3RW34-Variador de Velocidad

8/10/2019 3RW34-Variador de Velocidad

1/48

Siemens Energy & Automation, Inc.

SIKOSTARTTM 3RW34 Instruction Guide

3ZX1012-0RW34-1AN1

September, 2000


2/48

Siemens Energy & Automation, Inc.2

Hazardous voltage.

Will cause death

or serious injury.

Always de-energize and ground the equip-ment before maintenance. Read and

understand this manual before installing,

operating or maintaining the equipment.Maintenance should be performed only

by qualified personnel. The use of unau-

thorized parts in the repair of the equip-ment or tampering by unqualified person-

nel may result in dangerous conditionswhich may cause death or serious injury,

or equipment or property damage. Followthe pertinent standards and all safety

instructions contained herein.

QUALIFIED PERSON

For the purposes of this manual and product

labels, a qualified person is one who is familiarwith the installation, construction, operation ormaintenance of the equipment and the haz-

ards involved. In addition this person has thefollowing qualifications:

(a) is trained and authorized to energize,de-energize. clear, ground and tag cir-

cuits and equipment in accordance withestablished safety practices.

(b) is trained in the proper care and use of

protective equipment such as rubbergloves, hard hat, safety glasses or

face shields, flash clothing, etc., in

accordance with established safetypractices.

(c) is trained in rendering first aid.

SIGNAL WORDS

The signal words Danger, Warning and

Caution used in this manual indicate thedegree of hazard that may be encountered by

the user. These words are defined as:

Danger - Indicates death orserious injury will

result if proper precautions are not taken.

Warning - Indicates death, serious injury orproperty damage can result if proper precau-

tions are not taken.

Caution - Indicates some injury or property

damage may result if proper precautions arenot taken.


3/48

Siemens Energy & Automation, Inc. 3

Table of Contents

1 Introduction

1.1 Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . .5

1.2 SIKOSTART 3RW34 Features . . . . . . . . . . . . . . .51.3 Applications and Benefits . . . . . . . . . . . . . . . . . .5

2 Operating Principle

2.1 Function Overview . . . . . . . . . . . . . . . . . . . . . . .52.2 Functional Description . . . . . . . . . . . . . . . . . . . .52.3 Three-phase Systems . . . . . . . . . . . . . . . . . . . . .6

2.4 AC Motor Starting and Stopping . . . . . . . . . . . . .8

3 Controller Selection. . . . . . . . . . . . . . . . . . . . .10

4 Installation

4.1 Incoming Inspection . . . . . . . . . . . . . . . . . . . . .134.2 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

4.3 Installation Precautions . . . . . . . . . . . . . . . . . . .134.4 General Wiring . . . . . . . . . . . . . . . . . . . . . . . . .144.5 Power and Motor Connections . . . . . . . . . . . . .19

4.6 Control Connections . . . . . . . . . . . . . . . . . . . . .204.7 Installation Check . . . . . . . . . . . . . . . . . . . . . . .20

5 Wiring Diagrams

5.1 Typical Applications . . . . . . . . . . . . . . . . . . . . . .215.2 Circuit Devices . . . . . . . . . . . . . . . . . . . . . . . . .21

6 Setup and Operation

6.1 Setup Controls . . . . . . . . . . . . . . . . . . . . . . . . .30

6.2 LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . .316.3 Controller Setup . . . . . . . . . . . . . . . . . . . . . . . .31

6.4 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . .316.5 Initial Energization . . . . . . . . . . . . . . . . . . . . . . .31

6.6 Motor Starting Adjustments . . . . . . . . . . . . . . .32

7 Electrical Specifications . . . . . . . . . . . . . . . . .33

8 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . .36

9 Troubleshooting

9.1 Maintenance and Troubleshooting . . . . . . . . . . .37

9.2 Troubleshooting Tables . . . . . . . . . . . . . . . . . . . .379.3 Inside Delta Wiring Problems . . . . . . . . . . . . . .40

9.4 Shorted SCR Checks . . . . . . . . . . . . . . . . . . . .419.5 SCR (Thyristor) Testing . . . . . . . . . . . . . . . . . . . .41

10 Spare and Optional Parts10.1 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

10.2 Optional Parts . . . . . . . . . . . . . . . . . . . . . . . . . .45

Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46


4/48


1 SIKOSTART 3RW34 Block Diagram . . . . . . . . . . . . . . . 6

2 Basic Three-phase Waveforms . . . . . . . . . . . . . . . . . . . 6

3 Three-phase In Line-connected Arrangement. . . . . . . . 7

4 Three-phase Inside Delta-connected Arrangement . . . . 7

5 Wye and Delta Motor Connections . . . . . . . . . . . . . . . 8

6 Typical Torque/Speed Curves forMotor at Reduced Voltages . . . . . . . . . . . . . . . . . . . . . 8

7 Voltage and Time Curves forSoft Start with Coast to Stop. . . . . . . . . . . . . . . . . . . . 9

8 Voltage and Time Curves forSoft Start with Soft Stop . . . . . . . . . . . . . . . . . . . . . . . 9

9 Typical OverTemperature Switch Wiring . . . . . . . . . . . 15

10 Inductive Load Suppression . . . . . . . . . . . . . . . . . . . . 16

11 SIKOSTART ControllerPower and Motor Connections. . . . . . . . . . . . . . . . . . 17

12 SIKOSTART Controller Control Connections . . . . . . . . 18

13 Power wiring for motors,wired "In Line", in a vented enclosure (circuit breakeror fusible disconnect) . . . . . . . . . . . . . . . . . . . . . . . . 22

14 Control wiring for motors,wired "In Line", in a vented enclosure (circuit breakeror fusible disconnect) . . . . . . . . . . . . . . . . . . . . . . . . 23

15 Power wiring for a motor,wired "In Line" with bypass contactor . . . . . . . . . . . . 24

List of Figures

16 Control wiring for a motor,wired "In Line" with bypass contactor . . . . . . . . . . . . 25

17 Power wiring for motors, wired "Inside Delta"in a vented enclosure, with fusible disconnect andisolation contactor, and shunt trip circuit breaker. . . . 26

18 Control wiring for motors, wired "Inside Delta"in a vented enclosure, with fusible disconnect and

isolation contactor, and shunt trip circuit breaker. . . . 2719 Power wiring for a motor, wired "Inside Delta",

with bypass and isolation contactors . . . . . . . . . . . . . 28

20 Control wiring for a motor, wired "Inside Delta",with bypass and isolation contactors . . . . . . . . . . . . . 29

21 Setup Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

22 Potentiometer Settings . . . . . . . . . . . . . . . . . . . . . . . 32

23 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

24 Proper Inside Delta Wiring Connection. . . . . . . . . . . . 40

25 Typical Isolated Power Pole . . . . . . . . . . . . . . . . . . . . 41

26 Gate Triggering Test Diagram . . . . . . . . . . . . . . . . . . . 43

27 Latching/Holding Test Diagram. . . . . . . . . . . . . . . . . . 43

28 Typical 35 or 80 Amp SCR . . . . . . . . . . . . . . . . . . . . . 44

29 Typical 130 or 240 Amp SCR . . . . . . . . . . . . . . . . . . . 44

30 Typical 420 or 720 Amp SCR . . . . . . . . . . . . . . . . . . . 44

List of Tables

1 Motor Power Ratings (Kilowatts) TA = 40 C . . . . . . . . 10

2 Motor Power Ratings (Horsepower) TA = 50 C. . . . . . 11

3 Motor Power Rating (Kilowatts) TA = 60C . . . . . . . . . 12

4 Motor Power Ratings (Horsepower) TA = 60 C . . . . . 125 Terminal Screw and Ground Stud Nut Torque . . . . . . . 19

6 3-Lead Connections forDual Voltage 9-Lead Wye Motor. . . . . . . . . . . . . . . . . 20

7 6-Lead Connections for Dual Voltage12-Lead Delta Motor . . . . . . . . . . . . . . . . . . . . . . . . . 20

8 Potentiometer Setting Values . . . . . . . . . . . . . . . . . . . 30

9 Input (RUN) Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

10 Control Power Requirements . . . . . . . . . . . . . . . . . . . 35

11 LED Fault Indications . . . . . . . . . . . . . . . . . . . . . . . . . 3712 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

13 Inside Delta Wiring Problems. . . . . . . . . . . . . . . . . . . 40

14 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure Page Figure Page

Table Page Table Page


5/48


1 Introduction

1.1 Scope of Manual

This manual provides an overview for the installation, setup and

operation of the Siemens SIKOSTART 3RW34 controller.

Maintenance data consists of troubleshooting and spare partsinformation. Note that the instructions in this manual do not

cover all details or variations in equipment, nor provide for everypossible contingency to be met in connection with installation,

operation, or maintenance.

1.2 3RW34 SIKOSTART Features

The SIKOSTART 3RW34 product line is the next generation of

Siemens solid state reduced voltage controllers. This controllercom-bines DSP microprocessor and SCR technologies to provide AC

induction motor starting and operation. The sturdy compact frameaffords rugged, industrial grade reliability.

The SIKOSTART 3RW34 controller is a single ramp style con-troller using phase control for the operation of three-phase

induction motors. The controller can be set to operate eitherwye (star) or delta type motors. Each unit includes soft start and

stop parameters plus fault detection.The controller can be used

with an electro-mechanical starter or, when combined with anoverload relay, the controller can be used as a solid-state starter.

The SIKOSTART 3RW34 controller is available as an open type

(compact frame, no enclosure) or in a NEMA 1, 3R, 4, or 12enclosure. The unit can be ordered as a starter with overload

relays or as a combination starter with disconnecting means and

circuit overload protection devices. Additional options are alsoavailable such as push buttons, pilot lights, and meters.

1.3 Applications and Benefits

Typical applications for the SIKOSTART 3RW34 controller are to

soft start and soft stop AC induction motor driven equipment

such as fans, pumps and compressors. Applications alsoinclude controlling machines with gearbox, belt or chain drive

elements, such as: conveyors, sanders, planers, saws, packag-ing machines and punch presses.

Using the SIKOSTART 3RW34 controller provides benefits to

the drive system in the following ways:

1 )the life of mechanical drive transmission elements is

extended, e.g., gearbox jerking is substantially reducedresulting in less wear and tear;

2) reduced starting current relieves the supply network of cur-

rent peaks; and

3) smoother acceleration of loads eliminates process or product

damage.

2 Operating Principle

2.1 Function Overview

The SIKOSTART 3RW34 controller utilizes a voltage ramp design

to produce an output voltage to the motor that increases from a

customer selected initial voltage to full line supply voltage overan adjustable starting time. This voltage ramp produces a

reduced current start (soft start) similar to a current limit startwithout the load dependence of the current limit type start

Similarly, stopping time can be adjusted to provide a soft stopfor many pumping applications.

The SIKOSTART controller employs a DSP (digital signal proces-sor) to control the motor. This advanced type of microprocessor

allows the controller to contour the starting and stoppingramps. This contour adjusts for the nonlinearities of an induction

motor to produce a smoother and more linear motor start and

stop.

2.2 Functional Description

Power Poles: As is shown in the block diagram of figure 1, theincoming main power (L1, L2, L3) is connected to the con

trollers three power poles which control the voltage to the

motor windings. Each power pole consists of two SCRs in aback-to-back arrangement for each phase which allows alternat

ing current to pass to the motor.

Snubber PCB: The snubber printed circuit board(s) contains thetrigger circuit for each SCR. The firing signal for each trigger cir

cuit is generated at the logic printed circuit board. The snubbe

board sensing circuits send data to the logic board for factoringinto firing signal generation.The snubber board also includes an

RC network for a degree of protection against false firing of the

SCRs due to dv/dt and MOVs for transient protection.


6/48


X1

X2

A1

A2

13

14

27

28

RUN_OUT

RUN_LOCAL

POWER

SUPPLY

ASi+

ASi-

RUN_IN

RUN_OUT

UP-TO-VOLTAGE

FAULT

RUN_NET

RUN_IN

CONTROLLER

OR RUN_IN

RUN_OUT

UP-TO-VOLTAGE

FAULTUP-TO-

VOLTAGE

AS-i MODULE

DSP

38

37

FAULT_OUT

LOGIC PCB

Control

FIRE

SENSE

SNUBBER

PCB

FIRE

LINE SENSE

LOAD SENSE

FAN(S)

SCRs

1 L1 3 L2 5 L3

6 T34 T22 T1

6

3

3

Figure 1 3RW34 SIKOSTART Block Diagram Logic PCB. Apower supply on the logic printed circuit board accepts control

power (X1, X2) and provides power to the central processing unit(DSP), support circuitry, and cooling fan(s). The input coil termi-

nals (A1, A2) are for commanding the motor to RUN and STOP.

The three sets of numbered output terminals are for customercontrol devices related to Motor Running (e.g., start / stop

devices), Motor Running at Full Voltage (e.g., to drive a bypasscontactor), and Fault (e.g., phase loss or shorted SCR).

Setup Controls. Setup controls are connected to the logic boardbut are accessible from the controllers front cover. Three poten-

tiometers provide customer adjustments: T1 - the rate of thevoltage rise (accel ramp time); U - the initial motor start voltage;

and T2 - decel ramp time for a soft stop (pump stop).

A dip switch (SW1, figure 20) is used to set the controller soft-

ware to the proper application. The functions set are:

1. delay at stop: when bypass contactor is used.

2. delay at start: when isolation contactor is used.

3. circuit-type: In line or Inside Delta connection.

4. Fault output: opens or closes on fault.

2.3 Three-phase Systems

Since the controller can be used with In line or Inside Delta con-

nection a brief discussion of currents and voltages for three-phase wye and delta arrangements with balanced loads is

included here as an aid to understanding controller setup pro-cedures and to assure proper controller selection.

Figure 2 shows the voltage waveforms for a three-phase systemof three equal voltages separated by 120-degree phase angles.

The voltage in phase a, or Ua, leads the voltage in phase b, orUb, by 120. Likewise, Ub leads Uc by 120, and Uc leads Ua

by 120.

Figure 1 SIKOSTART 3RW34 Block Diagram

Figure 2 Basic Three-phase Waveforms

120 120 120


7/48


Figure 3 Three-phase In Line-connected Arrangement

Figure 4 Three-phase Inside Delta-connected Arrangement

Figure 3a

Figure 3b

Figure 4b

Figure 4a

I2Eb

b

U1,2

U2,3

U3,12

1

3I3

I1

Ec

Ea

a

c

Neutral

U1,2

U2,3

2

1

3

SIKOSTART

I_w3

Motor

w1

w2

w3

T2

T3

T1

L2

L3

L1

U3,1

I_scr3I_L3

scr2

scr1

scr3

I_scr = I_winding = 100% * I_Iine

I_scr = I_winding = 1/SqRt(3) * I_Iine = 57% * I_line

or

I_line = SqRt(3) * I_scr = 1.73 * I_scr = 1.73 I_winding

U1,2

U2,3

SIKOSTART

Motor

w

w2

w3

T2

T1

L2

L3

L1

U3,1

I_w2

I_L3

scr2L2

T3

L3

scr3

L1scr1

I_w3

2.3.1 Inline Connection

Figure 3a represents a three-phase inline-connected motor withthree sources connected to supply voltages, U1,2, U2,3, and U3,1.

The SIKOSTART controller is connected in line with the motorwindings.

As can be seen, the source current, the SIKOSTART current, and

the motor winding current are all equal.

2.3.2 Inside Delta Connection

Figure 4b represents a three-phase inside-delta-connectedmotor. The three sources are connected to supply voltages

U1,2, U2,3, and U3,1. The SIKOSTART controller is connectedinside of the delta in series with the motor winding.

As can be seen, the source or line current is split between two

motor windings. The winding current and SIKOSTART current is

therefore less than the source or line current. Note that themagnitude of a line current is greater than the magnitude of a

winding and SIKOSTART current by a factor of the square-root-of-three (1.73). This allows the SIKOSTART controller to operate

a motor of a higher current rating when connected inside of the

delta.


8/48

Figure 6 Typical Torque/Speed Curves for Motor at Reduced Voltages

Torque of the motor in the case of

a direct-on-line starting@Um (0) = 100% Ue

b starting with 3RW34

@Um (0) = 75% Uec starting with 3RW34

@Um (0) = 50% Ue

Relationship of voltage andspeed with respect to timein the case of soft - starting.Showing the effect of the

potentiometers Um and trlocated on the front panel ofthe devices.


Figure 5 Wye and Delta Motor Connections

2.3.3 Controller-to-Motor Connections

Wye Motor. The controller can be used for either a three- lead

or nine-lead wye motor. Connecting the controller to a wyemotor inserts the SCRs directly in the line wiring, referred to as

In Line wiring.

Delta Motor. The controller can be used for either 6 or 12 lead

delta motors. If the motor is hard wired as delta, the controllermust be connected and sized with In Line wiring as shown in

figure 5a.

Figure 5b shows the controller connected with the thyristorsinside the delta, referred to as Inside Delta wiring. For Inside

Delta wiring, the controller power rating may be increased (line

current = 1.73 phase current, figure 4) relative to the In Linepower rating.

2.4 AC Motor Starting and Stopping

Figure 6 shows three torque/speed curves (a, b, c) for a typical

induction motor.

a This curve shows the torque/speed relation when the motorstarting voltage, U, is 100% of line voltage (Ue).

b This curve shows the relation when the controller voltage

potentiometer, U (initial soft start voltage setting) is set for

75% of line voltage.

c This curve shows the relation when the controller voltage

potentiometer is set for 50% of line voltage.

The curve a motor (without soft starting) produces a very high

torque across most of the speed range, whereas, the curves band c motors (with soft starting) produce a much lower andadjustable torque. This allows slowerand smoother acceleration

of the motor and its load.

Figure 5a

Figure 5b

Volage U

t2= 0

t1

Time t

Um

3 or 9 Lead Wye Motors and 3 Lead Delta Motors

T1

T2

T3

T1

T2

T3

T1

L1

T2

L2

T3

L3

From Source Power

T1

T2

T3

T6

T5

T4

T1

L1

T2

L2

T3

L3

From Source Power

T6 T4 T5

6 or 12 Lead Delta Motors

Note Order of

T6 from L1T2 from L2

T5 from L3


9/48


2.4.1 Soft Start with Coast to Rest

Figure 7 shows the relationship of voltage and speed withrespect to time when a soft start is used with coast to rest.The

controller potentiometers have been set as follows.

Um The initial voltage is set at approximately 30%.

t1 The start time setting is greater than 0.

t2 The stop time is set at 0 which allows the motor to coast

to a stop.

On the voltage/time graph, the voltage starts at Um when the

run coil is energized and increases to 100% within the T1 timesetting. The voltage immediately drops to zero when the run

coil is de-energized.

The speed/time graph shows the motor accelerating from 0,when the run coil is energized, to operating speed. The time

required to accelerate may be more or less than the T1 setting

depending on the connected inertia. The motor speed coasts tozero when the motor is de-energized.

2.4.2 Soft Start with Soft Stop

Figure 8, like figure 7, shows the voltage and speed curves for asoft start but with controlled deceleration. The potentiometers

have been set as follows.

Um The initial voltage is set at approximately 30%.

t1 The start time setting is greater than 0.

t2 The stop time setting is greater than 0 which allows the

motor to soft stop.

The motor starting ramp is similar to the one shown in figure 7

But, when the run coil is de-energized, a motor stopping rampis formed where the motor voltage starts at 100% and decreas

es to 80% of Um (the initial start voltage) within the T2 time set-ting. Then the voltage immediately drops to zero. The time

required to decelerate may be more or less than the T1 settingdepending on the connected inertia.

When the run coil is de-energized, the speed decreasesthroughout the T2 time period and then coasts to zero.

Figure 7 Voltage and Time Curves for Soft Startwith Coast to Stop

Figure 8 Voltage and Time Curves for Soft Start with Soft Stop

MotorVoltage

F

0

100%

t2= 0

t1

U0

F

t

MotorSpeed

F

0

100%

t2= 0t1

U

0

F

M CoilInputEnergized

t

t

MotorVoltage

F

0

100%

t2

t1

U0

F

MotorSpeed

F

0

100%

t1

U

0

F

M CoilInputEnergized

F

0

t2

F

0

t

t

t


10/48


3 Controller Selection

Each controller has two ratings: In Line and Inside Delta.Inside Delta ratings are higher than In Line ratings.

Be sure to select equipment with the proper ratings for

the type of connections used.

For 24 VDC replace the ? in the catalog no. with 2.For 120 VAC replace the ? in the catalog no. with 3.

For 230 VAC replace the ? in the catalog no. with 4.

Table 1 - Motor Power Ratings (Kilowatts) TA = 40C

Catalog In Line Inside DeltaNumber le in Amps kW Voltage Amps kW Voltage

3RW3454-0DC?4 57 15/30 230/400 110 30/55 230/400

3RW3455-0DC?4 70 18.5/37 230/400 135 37/75 230/400

3RW3457-0DC?4 110 30/55 230/400 205 55/110 230/400

3RW3458-0DC?4 135 37/75 230/400 235 75/132 230/400

3RW3465-0DC?4 162 45/90 230/400 285 90/160 230/400

3RW3466-0DC?4 195 55/110 230/400 352 110/200 230/400

3RW3467-0DC?4 235 75/132 230/400 450 132/250 230/400

3RW3472-0DC?4 352 110/200 230/400 608 200/355 230/400

3RW3483-0DC?4 500 160/250 230/400 865 250/500 230/400

3RW3484-0DC?4 700 220/400 230/400 1216 400/710 230/400

3RW3486-0DC?4 1050 375/630 230/400 1720 530/1000 230/400

3RW3454-0DC?5 57 30/37 400/500 110 55/75 400/500

3RW3455-0DC?5 70 37/45 400/500 135 75/90 400/5003RW3457-0DC?5 110 55/75 400/500 205 110/132 400/500

3RW3458-0DC?5 135 75/90 400/500 235 132/160 400/500

3RW3465-0DC?5 162 90/110 400/500 285 160/200 400/500

3RW3466-0DC?5 195 110/132 400/500 352 200/220 400/500

3RW3467-0DC?5 235 132/160 400/500 450 250/335 400/500

3RW3472-0DC?5 352 200/220 400/500 608 355/400 400/500

3RW3483-0DC?5 500 250/355 400/500 865 500/630 400/500

3RW3484-0DC?5 700 400/500 400/500 1216 710/850 400/500

3RW3486-0DC?5 1050 630/710 400/500 1720 1000/1200 400/500


11/48


Each controller has two ratings: In Line and Inside Delta.

Inside Delta ratings are higher than In Line ratings.



For 24 VDC replace the ? in the catalog no. with 2.



Catalog In Line Inside DeltaNumber le in Amps Hp Voltage le in Amps Hp Voltage

3RW3454-0DC?4 42 20/22 230/400 81 30 200/230

3RW3455-0DC?4 57 25/30 230/400 110 40 200/230

3RW3457-0DC?4 81 30/45 230/400 162 50 200/230

3RW3458-0DC?4 110 40/55 230/400 205 75 200/230

3RW3465-0DC?4 135 50/75 230/400 235 75 200/230

3RW3466-0DC?4 162 75/90 230/400 285 125 200/230

3RW3467-0DC?4 195 100/110 230/400 352 175 200/230

3RW3472-0DC?4 285 150/160 230/400 500 250 200/230

3RW3483-0DC?4 450 200/250 230/400 700 300 200/230

3RW3484-0DC?4 608 300/355 230/400 1050 500 200/230

3RW3486-0DC?4 865 500/865 230/400 1416 600 200/230

3RW3454-0DC?5 42 30/40 460/575 81 60/75 460/575

3RW3455-0DC?5 57 40/60 460/575 110 75/125 460/5753RW3457-0DC?5 81 60/110 460/575 162 125/150 460/575

3RW3458-0DC?5 110 75/125 460/575 205 150/175 460/575

3RW3465-0DC?5 135 100/150 460/575 235 175/200 460/575

3RW3466-0DC?5 162 150/200 460/575 285 300/350 460/575

3RW3467-0DC?5 195 200/200 460/575 352 350/400 460/575

3RW3472-0DC?5 285 300/350 460/575 500 500/600 460/575

3RW3483-0DC?5 450 400/500 460/575 700 600/700 460/575

3RW3484-0DC?5 608 600/400 460/575 1050 1000/1200 460/575

3RW3486-0DC?5 865 800/1000 460/575 1416 1300/1700 460/575

Table 2 - Motor Power Ratings (Horsepower) TA = 50C


12/48


Each controller has two ratings: In Line and Inside Delta.

Inside Delta ratings are higher than In Line ratings.



For 24 VDC replace the ? in the catalog no. with 2.

For 120 VAC replace the ? in the catalog no. with 3.For 230 VAC replace the ? in the catalog no. with 4.

Catalog In Line Inside DeltaNumber le in Amps Hp Voltage le in Amps Hp Voltage

3RW3454-0DC?4 35 15 230 57 20 230

3RW3455-0DC?4 42 20 230 81 30 230

3RW3457-0DC?4 57 20 230 135 50 230

3RW3458-0DC?4 81 30 230 162 60 230

3RW3465-0DC?4 110 40 230 205 75 230

3RW3466-0DC?4 135 50 230 235 100 230

3RW3467-0DC?4 162 60 230 285 125 230

3RW3472-0DC?4 235 100 230 448 175 230

3RW3483-0DC?4 352 150 230 637 250 230

3RW3484-0DC?4 500 200 230 865 350 230

3RW3486-0DC?4 726 300 230 1216 500 230

3RW3454-0DC?5 35 25/30 460/575 57 40/50 460/575

3RW3455-0DC?5 42 30/40 460/575 81 60/75 460/575

3RW3457-0DC?5 57 40/50 460/575 135 100/125 460/575

3RW3458-0DC?5 81 60/75 460/575 162 125/150 460/575

3RW3465-0DC?5 110 75/100 460/575 205 150/200 460/575

3RW3466-0DC?5 135 100/125 460/575 235 200/250 460/575

3RW3467-0DC?5 162 125/150 460/575 285 250/300 460/575

3RW3472-0DC?5 235 200/250 460/575 448 350/450 460/575

3RW3483-0DC?5 352 300/350 460/575 637 500/600 460/575

3RW3484-0DC?5 500 400/500 460/575 865 700/800 460/575

3RW3486-0DC?5 726 600/750 460/575 1216 1000/1200 460/575

Table 4 - Motor Power Ratings (Horsepower) TA = 60C

Table 3 - Motor Power Ratings (Kilowatts) TA = 60C

Catalog In Line Inside DeltaNumber le in Amps kW Voltage le in Amps kW Voltage

3RW3454-0DC?4 35 11/18.5 230/400 57 15/30 230/400

3RW3455-0DC?4 42 11/22 230/400 81 22/45 230/400

3RW3457-0DC?4 57 16/30 230/400 135 37/75 230/400

3RW3458-0DC?4 81 22/45 230/400 162 45/90 230/400

3RW3465-0DC?4 110 30/55 230/400 205 55/110 230/400

3RW3466-0DC?4 135 37/75 230/400 235 75/132 230/400

3RW3467-0DC?4 162 45/90 230/400 285 90/160 230/400

3RW3472-0DC?4 235 75/132 230/400 448 132/250 230/400

3RW3483-0DC?4 352 110/200 230/400 637 200/375 230/400

3RW3484-0DC?4 500 160/250 230/400 865 250/500 230/400

3RW3486-0DC?4 726 220/400 230/400 1216 400/710 230/400

3RW3454-0DC?5 35 22 500 57 37 500

3RW3455-0DC?5 42 30 500 81 55 500

3RW3457-0DC?5 57 37 500 135 90 500

3RW3458-0DC?5 81 55 500 162 110 500

3RW3465-0DC?5 110 75 500 205 132 500

3RW3466-0DC?5 135 90 500 235 160 500

3RW3467-0DC?5 162 110 500 285 200 500

3RW3472-0DC?5 235 160 500 448 335 500

3RW3483-0DC?5 352 220 500 637 450 500

3RW3484-0DC?5 500 355 500 865 630 500

3RW3486-0DC?5 726 530 500 1216 850 500


13/48


4 Installation

4.1 Incoming Inspection

1. Unpack the controller from the carton and inspect for ship-ping damage. Check that the items on the packing list agree

with the order. File claims for loss or damage with thefreight carrier immediately.

2. If the controller will not be installed immediately, it should be

stored in a clean, dry area where the ambient temperature is

between 0C and 70C. Avoid storage environments withcorrosive atmospheres or high humidity.

Note: Installation must be performed by qualified personnel

as indicated on page 2 of this manual.

3. The carton and packing materials should be retained in case

there is a future need to return the controller to the factoryfor service or repair. The carton and packing material are

especially fitted to protect the controller from shipping dam-

age.If these materials are not used for shipping, claims for shipping

damage may be rejected by the freight carrier.

4.2 Mounting

1. Section 8 of the manual contains controller mounting dimen-

sions and data. Air flow through the unit is vertical, from bot-tom to top.

2. Adequate cooling is essential for proper operation. Leave a

least 6 inches of clearance above and below the unit to allowunimpeded convection or fan air flow. Wire bending

allowance may require more than this recommended mini-mum clearance.

3. When mounting the controller in an enclosure, the enclosuremust be properly sized or ventilated to provide cooling fo

the continuous power dissipation in the thyristors, approximately 3 watts per ampere of continuous rating. The fol

lowing vent areas are required for each inlet and each outleon customer furnished enclosures, motor contro

centers, etc.

Locate front ventilation air inlet vent at least 3 inches below thebottom edge of the controller. Locate the outlet air vent area a

least 6 inches above the controller top edge. Air filters impede

air circulation and require a fan at inlet and/or outlet.

Some enclosures use bypass contactors or heat exchangedevices to maintain the integrity of the type of protection

Establish a maintenance schedule for enclosures with hea

exchangers. Equipment cleaning frequency should be based onthe operating environment.

4.3 Installation Precautions

The following precautions are intended for use as guidelines fo

proper installation of the controller. Because of the variety o

applications, all of these precautions may not pertain to yousystem and they are not all-inclusive. In addition to the follow

ing, refer to codes and standards applicable to your particulasystem.

4.3.1 Motor Branch Circuit

The IEC standard and local regulations govern the installation o

the SIKOSTART controller and the motor it will control. Refer toIEC and DIN standards for requirements and data regarding 1

motor disconnecting means, 2) motor branch circuit short circuiand ground fault protection, and 3) motor overload regulations.

Voltage or fire hazard.Can cause death, serious injury, orproperty damage.

To prevent electrical shock or burns, do notleave foreign objects (wire clippings, metalchips, etc.) either inside or on top of the con-troller during installation procedures.

Heavy equipment.May cause injury or property damage.

To avoid personal injury or controller damage,

do not use the controller cover as a handlewhen moving and/or positioning the unit.

Fire hazard.Can cause death, serious injury, or

property damage.

To prevent a fire, the controller, especially anon-fan-cooled unit, must be mounted withits fins in a vertical direction only. Side waysmounting and improper ventilating can resultin fire.

Hazardous voltage.Can cause death, serious injury, or

property damage.

To avoid electrical shock, this controller

MUST be wired with motor disconnect-ing means and branch circuit protection

because the controller does not provide

electrical isolation to the motor when thecontroller is OFF.

Cat. Number sq. in. mm2 Continuous Amps

3RW3454 not reqd not reqd up to 57A

3RW3455-65 20 129 up to 131A

3RW3466-67 40 258 up to 248A

3RW3472-83 80 516 up to 480A

3RW3484-86 120 774 up to 960A


14/48


15/48


4.4.1 Power and MotorWiring

Power supply and motor wiring ampacity should be based onthe current ratings of the motor as specified on the nameplate

and in compliance with NEC and local codes. Power and motorsupply wiring should be routed in its own separate conduit or

wireway.

Each SIKOSTART controller is available in several power supplyvoltage range models. Ensure that the supply voltage and fre-

quency are within the rated range of the controller.

When welding cable or other fine wire cables are used for

power wiring, use crimp type solderless terminals due to thefine strand characteristic of this cable. Screw type compression

terminals are not recommended. The fine wires can jam thethreads of the terminal and prevent sufficient compression of

the wire strands. In addition, the fine wires can relax in the ter-

minal, which can lower the compression of the cable. If the con-tact ends of the cable are not properly compressed, arcing can

occur with the risk of a fire.

4.4.2 Grounding

The controller enclosure and the motor frame must be properlygrounded in a manner that meets all applicable wiring codes. A

ground stud at the line and motor terminals on the controllerframe is provided for connecting the SIKOSTART controller to

system earth ground.

A complex system must have only one ground point to common

power supplies, signal returns, etc. to prevent ground loops. Inmost cases a large grounded metal object, such as a control

cabinet, may be considered a single point. Using a short groundwire to a cabinet is better than using a long ground wire to a ter-

minal barrier bussing point.

4.4.3 Control Wiring

SIKOSTART 3RW3486 soft start controls rated at 960 amperes

require an over temperature shut off switch. Following is a

description of the mounting and wiring of this switch.

Mounting the Over Temperature Switch

The over temperature switch and bracket are mounted at thetop end of the SIKOSTART control without any cooling fans. This

is the main lines and utility power end of the control

(L1 to L3). The bracket is mounted under one of the middle casemounting bolts.

Fire hazard.

Can cause death, serious injury, orequipment damage.

Welding cable requires crimp type solderlessterminals to prevent arcing and possible fire,

CAUTIONOnly use flexible connectorsto connect power wires tocontroller busbar.

Wiring the OverTemperature Switch

The over temperature switch has a normally closed contac

that opens when an over temperature condition exists. The

contact has two (2) quick-connect terminals for connection tothe control circuit. The contact is wired in series with the

start/stop control circuit. The switch contact is rated fo220 VAC at 8 amps resistive maximum.

Hazardous voltage.Will cause death or serious injury.

To avoid electrical shock or burn, do not touchcontroller output terminals when voltage is applied

to the controller.Output terminals will have voltage present evenwhen the controller is OFF.

DANGER

Bypass

F1

Start

Stop RUN FAULT

G1

S1

S2

G1

G1

K1

A1

A2

X1

X227

28

G1G1

13

14

37

38

over tenp

RUN

U_Motor=100%

L1/L+

N/L-

Figure 9 Typical Over Temperature Switch Wiring

Hazardous voltage.

Can cause death, serious injury, or propertydamage.

To prevent electrical shock or burns, do not leaveforeign objects (wire clip-pings, metal chips, etc.)either inside or on top of the controller duringinstallation procedures.

WARNING


16/48


Control Wiring. The control wiring is connected at the logicboard terminals shown in figure 12.

Control Voltage. Each SIKOSTART controller is available in sev-eral control voltage models. Ensure that the control voltage and

frequency supplied match the controller model.

Wire Specifications. Each control terminal can accept a maxi-mum of two 14-AWG (2,5 mm2) stranded wires. Be sure ring

tongue terminals are sized correctly for the wire.

Labeling. Each wire should be appropriately labeled using

tape, shrink-tubing, or other dependable method.

Routing. All control wiring must be kept separate from powerand motorwiring and run in its own separate conduit. Keep con-

trol wire bundles physically separated from power wiring by atleast 6 inches. Where control and power wiring must cross,

they should intersect at right angles.

4.4.4 Coil Suppression

Relay, electromechanical brake, or solenoid coils produce elec-

trical noise transients (especially when being de-energized)which can be coupled into the controller circuitry and cause

erratic operation. For all such devices connected to or near thecontroller or its wiring, see figure 10 and observe the following.

24V DC Coils. Connect a diode directly across each DC coil. A

standard diode (e.g. 1N4004) is acceptable for most 24V DCapplications up to 1.0A. A varistor or surge suppressor can also

be used in place of the diode.

120V/230V AC Coils. Use an R-C circuit (0,47 F, 600V capaci-

tor in series with a 1/4 watt 220 ohm resistor) across each120V/230V AC coil. An appropriately rated varistor or surge sup-

pressor can be used in place of the R-C circuit, however, R-Ccircuits are recommended because they limit the rate of rise of

noise and thus help eliminate high frequency components.

CAUTIONThe control outputs are semiconductor (solid state) out-puts. Applying improper control voltage and/or frequen-

cy can damage the control circuits.

Use control circuits only at the rated voltage and frequency. DC24Vmodels have solid state FET outputs and should not be used on ACcircuits. Alternately, AC120V & AC230V models have triac outputsand should not be used on DC circuits.

AC Coil120/230VAC

220 ohm1/4 Watt

0,47 F600VDC/220VAC

Switch

DC Coil

+Switch

+

24VDC

Figure 10 Inductive Load Suppression

Cat.-No.3RW3486-....

End withno fans

Overtemperatureswitchassembly


17/48


Figure 11 SIKOSTART Power and Motor Connections

L1(1) L2(3) L3(5) PE

PE

Motor

3~

T1

(2)

T2

(4)

T3

(6)

Optional

Fusible Disconnect

Switch or

Circuit Breaker

SIKOSTART

OptionalOverload Relay

Optional Power

Factor Correction

Capacitor Contactor

Optional Power

Factor Correction

Capacitor

L1

L2

L3

PE


18/48


19/48


4.5 Power and Motor Connections

The controller input terminals L1, L2 and L3, are at the top ofthe unit and the output terminals T1,T2 and T3 are at the bot-

tom of the unit (figure 11). Observe the following:

1. Torque the power and motor terminal set screws according

to the wire size as indicated in table 5.

2. Torque the ground stud nut according to controller opera-tional current as indicated in table 5.

4.5.1 Power Connections

1. Connect the proper capacity 3-phase 50/60 Hz voltagesource to the controller input terminals L1, L2, and L3.These

terminals are not phase sensitive.

The voltage source must be correct because:

a. Connecting the controller to a line voltage higher than its

rating will open the protective resistor in the snubberboard and prevent controller operation; repair will be

required before the controller can be put into operation.

b. Connecting the controller to a line voltage lower than itsrating will: 1) cause erratic controller operation resultingin damage to the motor, or 2) prevent controller opera-

tion due to the low control voltage lockout protective fea-ture.

2. Connect the ground terminal (labeled with ground symbol)to earth ground.

4.5.2 Motor Connections

1. The VDE/NEC motor overload protection requirement can be

met with an optional overload relay.

2. The controller can be used for wye or delta motors with con-nections to the motor as either In Line wiring or Inside Delta

wiring (paragraph 2.3.3). Be sure the power ratings are cor-rect for the type of connection required for the application;

refer to section 3.

3. For a dual voltage 9-lead wye motor the 3-lead controller-to-

motor terminal connections are listed in Table 6.

Threaded Item

Terminal Screw

Wire Size Torque

AWG or MCM* mm2 lb-in. Nm

6 to 4 16-25 100 11

3 to 2 35 125 14

1 50 135 15

1/0 to 2/0 50-70 150 17

3/0 to 4/0 95-120 225 25

250 to 400 120-185 290 33

500 to 600 240-300 335 38

Nut on Ground Stud Controller Operational Current

=360A 110 12

* for 75C Aluminum or Copper Wire


To avoid electrical shock or burn, turn off mainand control voltages before performing instal-lation or maintenance.

Wrong power rating may cause injury or

property damage.

Confirm that the correct HP rating for the controllercorresponds to the type of connections being used;e.g. dont use Inside Delta rating for a controllerwired In Line.

Wrong motor connection will cause

property damage.

Confirm that the motor connections are accordingto the wiring diagrams in chap.5.

Hazardous voltage.Can cause death, serious injury or

property damage.

The controller case must be groundedto earth for operators safety.

Table 5 Terminal Screw and Ground Stud Nut Torque


20/48


Table 6 3-Lead Connections for Dual Voltage 9-Lead Wye Motor

High Voltage Wiring Low Voltage Wiring

Controller Motor Controller MotorTerminal Terminal Terminal Terminal

T1 T1 T1 T1 & T7

T2 T2 T2 T2 & T8

T3 T3 T3 T3 & T9

T4-T7* T4-T5-T6*

T5-T8*

T6-T9*

* Jumper * Jumper

4. 6-lead delta motor connection is shown in figures 17 and 18.Connections from controller to motor are one on one, i.e. T1

to T1,T2 to T2, etc.

5. For a dual voltage 12-lead delta motor the 6-lead controller-to-motor connections are listed in Table 7.

Table 7 6-Lead Connections for Dual Voltage 12-Lead Delta Motor

High Voltage Wiring Low Voltage Wiring

Controller Motor Controller MotorConnection Terminal Connection Terminal

T1 T1 T1 T1 & T7

T2 T2 T2 T2 & T8

T3 T3 T3 T3 & T9

T6 T12 T6 T6 & T12

T4 T10 T4 T4 & T10

T5 T11 T5 T5 & T11

T4-T7*

T5-T8*

T6-T9*

* Jumper

6. For multispeed application, the SIKOSTART controller can be

used with an electromechanical starter to provide soft start.The controller output must be connected to the line input of

the multispeed starter. Individual motor overload protectionshould be supplied for each motor speed separately. During

speed transitions, control input (A1, A2) must be off for a

minimum of 200 milliseconds.

7. When using the controller with part winding motors, thesemotors must be connected in their full voltage run winding

configuration, and the three motor leads connected to the

controller output terminals.8. The motor frame should be connected to the earth ground

terminal.

4.6 Control Connections

1. Connect the control power supply (Us) specified on the con-

troller label to the X1 and X2 terminals; see figure 12.

2. Connect control circuit pilot devices in accordance with the

application. Section 5 provides examples of several typicalarrangements; section 6 describes the dip switch (SW-1)

settings.

3. Torque the control circuit terminal screws according to thewire size as indicated below.

4.7 Installation Check

1. Check that all wiring and power connections are secure andthat mounting bolts are tight.

2. Remove all wire cuttings, installation particles, metal chips

and debris before energizing.

3. Shut enclosure doors to protect equipment from dust and

personnel from hazardous voltage.

Wire Size Torque

AWG mm2 lb-in. Nm

24 to 12 0.25-4 8 0.9


21/48


5 Wiring Diagrams

5.1 Typical Applications

This section contains four wiring diagram sets for typical appli-

cations as follows.

Figure 13 & 14 - Two Motors, Wired In Line, in a Vented

Enclosure

Figure 15 & 16 - Motor,Wired In Line, with Bypass Contactor

Figure 17 & 18 - Two Motors, Wired Inside Delta, in a VentedEnclosure, 1 with Isolation Contactor 1 with Shunt Trip

Figure 19 & 20 Single Motor, Wired Inside Delta, with Bypassand Isolation Contactors

Each diagram set consists of two sheets: one showing the

power and motor connections and one showing the controlwiring. The SW1 chart at the bottom of the power and motor

diagram indicates the switch settings required for that particular

configuration (refer to paragraph 6.1).

5.2 Circuit Devices

Common Circuit Devices. Some circuit devices common toeach application shown include:

an overload relay (F1, F2) for motor protection;

either a circuit breaker (Q1) or a fused disconnect switch(S1/F1) to connect and disconnect main power to the

application;

a Start/Stop control that is connected so when the startswitch is pushed, the RUN coil in the controller is energized,

and the controller RUN interlock contact closes and latches

in the RUN coil. When the stop switch is pushed or poweris lost, the circuit is broken and the controller drops out

which shuts off power to the motor. If a two wire Start/Stopcontrol connection is used, the motor may automatically

restart when power is restored to the controller.

Bypass Contactor. The applications shown in figures 15 and 19

include a bypass contactor (K2). The bypass contactor is rated

to handle the running current of the motor but not the startingcurrent. The bypass contactor remains open until the controller

has soft-started the motor. Once the motor is operating at linevoltage, the Up-to-Voltage contact closes and the bypass con-

tactor is energized causing motor current to flow through thebypass contactor rather than the controller.

A bypass contactor is useful when the controller is mounted ina IP 4x, or other airtight enclosure. When the motor current is

routed through the bypass contactor, no current is flowingthrough the controller SCRs, and the controller generates no

heat.

For both applications, the switch section SW1-1 is set to the

turn off delay position so that the bypass contactor de-energizesbefore the controller (refer to paragraph 6.1).

Isolation Contactor. The applications shown in figures 17 and

19 include an isolation contactor. The isolation contactor is ener-

gized when the controller is operating (RUN coil is On) and pro-

vides power to half of the windings of the 6-lead delta motor. Ifa controller fault occurs, the fault contact opens which de-ener-gizes the isolation contactor and the motor stops.

For both applications, switch section SW1-4 is set to open thefault contact on fault detection and switch section SW1-2 is set

so that the isolation contactor energizes before the controller(refer to paragraph 6.1).

Shunt Trip. A shunt trip circuit breaker is used on the second

motor in figure 17. The switch section SW1-4 is set to close the

fault contact on fault detection. With the circuit breaker (Q1closed and the controller operating (RUN coil is On), the shunt

trip coil is de-energized. If a controller fault occurs, the fault con-tact closes to energize the shunt trip coil which trips open the

circuit breaker and disconnects power to the controller and

motor.

The figure 17 application shows two methods of using the con-troller fault contact to stop the motor when a fault occurs: 1) the

fault contact opens to de-energize the isolation contactor forthe first motor (M1 and 2) the fault contact closes to operate

the shunt trip on the circuit breaker for the second motor (M2)


22/48


Figure 13Power wiring for motors, wired "In Line", in a vented enclosure (circuit breaker or fusible disconnect)

S1

F1

G2

L1 L2 L3 PE1 3 5

T1 T2 T3

2 4 6 PE

F3

U V W

M

3~M2

Q1

G1

L1 L2 L3 PE1 3 5

T1 T2 T3

2 4 6 PE

F2

U V W

M

3~M1

L1

L2

L3

PE

I > I > I >

Switch Settings for M1 Switch Settings for M2


23/48


Figure 14Control wiring for motors, wired "In Line", in a vented enclosure (circuit breaker or fusible disconnect)

X1

X2

A1

G1

A2

F2

13

14

G1

RUNINPUT

RUN FAULT Um=100%

G1

Stop

Start

S3

37

38

G1

27

28

G1S2

X1

X2

A1

G2

A2

F3

13

14

G2

RUNINPUT

RUN FAULT Um=100%

G2

Stop

Start

S5

37

38

G2

27

28

G2S4

N/ L

L1/L+


24/48


25/48


Figure 16Control wiring for a motor, wired "In Line" with bypass contactor

X1

X2

A1

G1

A2

F1

13

14

G1

RUNINPUT

RUN FAULT

G1

Stop

Start

S2

37

38

G1S1

27

28

G1

K1

Um=100%

Bypass

N/ L

L1/L+


26/48


Figure 17Power wiring for motors, wired "Inside Delta" in a vented enclosure, with fusible disconnect and isolation contactor, and shunt trip

circuit breaker

G2

L1 L2 L3 PE

1 3 5

T1 T2 T3

2 4 6 PE

F3

U1

V2

W1

M

3~

M2

PE

U2

W2

V1

S1

F1

G1

L1 L2 L3 PE

1 3 5

T1 T2 T3

2 4 6 PE

F2

U1

V2

W1

M

3~

M1

Q1

L1

L2

L3

PE

I > I > I >

K1

PE

U2

W2

V1

Noteorder ofterminalleads

T6 T4 T5

12 8 10

Shunttrip


Switch Settings for M1 Switch Settings for M2


27/48


Figure 18Control wiring for motors, wired "Inside Delta" in a vented enclosure, with fusible disconnect and isolation contactor, and

shunt trip circuit breaker

X1

X2

A1

G1

A2

F2

13

14

G1

RUNINPUT

RUN FAULT Um=100%

G1

Stop

Start

S3

37

38

G1

27

28

G1S2

K1

X1

X2

A1

G2

A2

F3

13

14

G2

RUNINPUT

RUN FAULT Um=100%

G2

Stop

Start

S5

37

38

G2

27

28

G2S4

Q1

Shunttrip

FAULT

N/ L

L1/L+


28/48


Figure 19Power wiring for a motor, wired "Inside Delta", with bypass and isolation contactors

S1

F1

G1

L1 L2 L3 PE

1 3 5

T1 T2 T32 4 6 PE

F2

U1

V2

W1

M

3~

M1

L1

L2

L3

PE

K1

PE

U2

W2

V1

T6 T4 T512 8 10

U1 V1 W1 W2 U2 V2

K2


Switch Settings for M1


29/48


Figure 20Control wiring for a motor, wired "Inside Delta", with bypass and isolation contactors

X1

X2

A1

G1

A2

F2

13

14

G1

RUNINPUT

RUN

G1

Stop

Start

S3

S2

27

28

G1

K2

37

38

G1

K1

Um=100% FAULT

Bypass Fault

N/ L

L1/L+


30/48


6 Setup and Operation

6.1 Setup Controls

The setup controls are at the right side of the controller and are

accessible without removing the cover. Figure 21 shows thecontrols: three potentiometers, T1, U, and T2; and DIP switch

SW1. Values for the potentiometer settings are listed in Table 6.

Use a small screwdriver to change the potentiometer setting,rotating clockwise to increase and counterclockwise to

decrease.

Note: The controls are set at the factory for a typical starter.Please verify the application for proper settings. (For detailed

picture of the potentiometers see figure 22)

T1 - Start Time. This 16-position potentiometer sets the accel-

eration ramp time up to 60 seconds maximum. This settingdetermines the time interval for the voltage to increase from theinitial setting (U) to line voltage.

U - Initial Voltage. This 16-position potentiometer sets the ini-tial voltage at a percentage of line voltage: 30% to 80 %. The

initial setting should be the level that causes the motor shaft toturn as soon as the run signal is given. .

T2 - Stop Time. This 16-position potentiometer sets the decel-

eration ramp time up to 60 seconds maximum. This setting

determines the time interval for the voltage to decrease fromline voltage to 80% of the initial setting (U).

SW1 - DIP Switch. This switch has four sections which provide

setting the controller software to correspond to the application.

Each switch section is positioned by sliding it to the right or leftas viewed in figure 21 (up or down when the controller is

mounted vertically). On the wiring diagrams in section 5, theposition of each switch section is indicated by an arrow pointing

to either the right or left.

1. SW1-1: This switch provides a turn off delay signal setting

(left position). The off delay allows a bypass contactor tode-energize 1,0 seconds before the controller RUN coil de-

energizes.

The right position of switch SW1-1 provides no delay.Whenthe stop device is actuated, the RUN coil de-energizes

immediately.

2. SW1-2: This switch provides a turn on delay signal setting

(left position). The on delay allows an isolation contactor toenergize first, at zero current, followed by the controller RUN

coil 1,0 seconds later. The delay maximizes contact life on

the isolation contactor. If no delay is set this can cause afailure (missing phase). Also use this switch for isolation

contactors behind the soft starter (e.g. Dahlander circuits).The right position of switch SW1-2 provides no delay. When

the start device is actuated, the RUN coil energizesimmediately.

3. SW1-3: This switch directs the controller software to oper-ate the SCRs for either a Wye motor - In Line wiring (left

position) or a Star/Delta motor - Inside Delta wiring (right

position).

Hazardous voltage.

Will cause death or serious injury.

To avoid electrical shock or burn, turn off

main and control voltages before per-forming installation or maintenance

Figure 21 Setup Controls

Table 8 Potentiometer Setting Values

Ramp TimeDial Initial Voltage U T1,T2

Setting (% Full Voltage) (Seconds)

0 30 0,51 33 1,02 36 2,03 40 4,0

4 43 6,05 46 8,06 50 107 53 12

8 56 159 60 20A 63 25B 66 30

C 70 35D 73 40E 76 50F 80 60

Factory Settings T1=8 (15 sec)

T2=0 (0,5 sec)

U=8 (56%)

T2U T1

When the switch is set to Standard Circuit, the motor

must also be operated in the standard circuit; andwhen the switch is set to Star-delta the motor must

also be operated in star-delta!

If the switch is set to a type of circuit not connected, this

can cause very high currents to occur during operation.

These currents can destory or demage thyristors and othercomponents. Be sure to set the soft starter to the type of

circuit actually in use.


31/48


4. SW1-4: This switch sets the fault contact, which is a nor-

mally open contact,to respond to a fault by either closing(arrow down position, switch to the left) or opening (arrow

up position, switch to the right).

With the open on fault position selected, contact status is as

follows.Power off - contact is open

Power on - contact closesFault occurs or loss of power - contact opens

With the close on fault position selected, contact status is

as follows.

Power off - contact is openPower on - contact is open

Fault occurs - contact closes

The contact remains open for a loss of power.

The factory settings for switch SW1 sections are:

SW1-4: close on fault (switch left)SW1-3: In Line wiring (switch left)

SW1-2: no on delay (switch right)SW1-1: no off delay (switch right)

6.2 LED Indicators

Two LED indicators are located above the potentiometers.These LEDs indicate controller status and fault conditions as fol-

lows.

LED 1 (Top)Constant Display Controller is ready for operation

Single Flashing FAULT: Main voltage phase loss*

Double Flashing FAULT: EEPROM parity error

LED 2 (Bottom)Constant Display Output voltage equals line voltage,

i.e., motor is up to speed

Single Flashing Output voltage is less than line voltage,i.e., motor is starting or stopping

Double Flashing FAULT: Shorted SCR

* no action to fault output

6.3 Controller Setup

Before the initial startup, set the controls as follows.

1. Set switch SW1 sections in accordance with the application.

2. Set Start Time T1. This setting is application dependent,

affected by load torque, motor voltage, and total inertia. Thefactory setting is 8, or 15 seconds.

3. Set Initial Voltage U. The factory setting is 8, or 56% ofthe line voltage.

4. Set Stop Time T2. The 0 setting allows the load to coast to

rest. If the soft stop feature is required for the application,set T2 to the 8 position. The factory setting is 0.

6.4 Preliminary Checks

With main power disconnect device open and control power off,check the following.

1. Power and Motor Connections. Check that the controller

has been properly connected to the power source andmotor per figure 11.

2. Control Connections. Check that control power, the

start/stop control, and applicable devices have been proper-ly connected to the control terminal board (figure 12).

3. AC Line PowerVerification. Verify that each phase of the ACline power at the disconnect device is within the rated value

of the controller as indicated on the controller nameplate.

4. Ground Check. Use an ohmmeter set to its highest scaleand observe the following.

a. Check for a ground between each controller output ter-minal (T1, T2,T3) and chassis ground. Each terminal to

ground reading should be over 500K ohms.

b. The measurement between each input terminal (L1, L2,L3) and ground should be over 500K ohms.

6.5 Initial Energization

1. Temporarily remove run signal connections by opening thecircuit at control terminals A1 and A2.

2. Turn on main AC power and control power to the controller;LED 1 comes on.

3. Measure input AC voltages L1 to L2, L2 to L3, and L3 to L1.

Voltages should be within the controllers rated range andbalanced for proper motor operation.

When the line voltages are not equal, unbalanced currents inthe stator windings occur. A small percentage voltage

unbalance results in a much larger percentage current unbal-

ance. Consequently, the temperature rise of the motoroperating at a particular load and percentage voltage unbal-

ance is greater than for the motor operating under the sameconditions with balanced voltages.

Hazardous voltage.

Will cause death or serious injury.

To avoid electrical shock or burn, turn offmain and control voltages prior to performingpreliminary checks.

Hazardous Voltage.

Can cause death, serious injury, orproperty damage.

To avoid electrical shock or burn, do notoperate controller with either the cover orthe control terminal finger guard removed.


32/48


33/48


Order number 3RW34..0DC2. ..0DC3. ..0DC4.

Coil Voltage 24VDC 120VAC 230VACIsolation Voltage, VAC 1500 1500 1500

Input Current, mA 10@24VDC 10@120VAC 10@230VAC

On Voltage, volts min. 17 VDC 85 VAC 170 VAC

On Current, mA min. 6 6 6

Off Voltage, volts max. 8VDC 40VAC 80VAC

Off Current, mA max. 3 3 3

Input Impedance,

ohms (typical) 13k 13k 13k

7 Electrical Specifications

Main Voltage Required In Line Application: 200/460V AC or 400/600V AC each15% (specified by catalog no.)Inside Delta Application: 200/400V AC or400/600V AC each 15% (specified by catalog no.)

Control Voltage Required 24V DC, 120V AC, or 230V AC, +10%, -15%(specified by catalog no.)

Control power requirements are listed below (table 9).

AC Frequency & Phase 50/60 Hz, working 45 to 65 Hz; 3 phaseTemperature Range 0 to 60C, inside enclosure in which unit is mounted.

Derating for 60C see table 3

Permissible Altitude 1000m at rated output2000m at 0.87*le3000m at 0.77*le

Overcurrent Protection The standard SIKOSTART controller is notequipped with overload protection. The user shouldprovide overload protection.

Ratings for Frequent Starts and Occasional - 20 times in any 60 minute period:Stops, Plugging or Jogging Applications Controller rating to be 133% of motor rating.

Severe - 5 times in any 60 second period:Controller rating to be 200% of motor rating.Very Severe - 10 times in any 60 second period:Controller rating to be 300% of motor rating.

Controller Current RatingsDuring Start and Run: Current Cold Start Time @ 50 C

115% Continuous200% 480 sec.300% 120 sec.450% 30 sec.500% 20 sec.600% 10 sec.

Adjustment Ranges -16 settings each:Start Time (Accel Ramp) 0.5 to 60 seconds*Stop Time (Decel Ramp) 0.5 to 60 secondsInitial Voltage 30% to 80% of nominal voltage (approximately

10% to 64% on normal starting torque)*Acceleration time of the motor will probably beless than the Start Time setting and will varydepending on the load friction and inertiacharacteristics of the system.

Table 9 - Input (RUN) CoilInput (RUN) Coil


34/48


User Outputs Rating N.O. outputs are rated 0.5 Amp maximum atThree solid state outputs are 24V DC, and 1.0 Amp at 120V AC and 230V AC.

available for the user to apply

Solid State Outputs M (RUN) When controller is operating,

the RUN contact is closed.

Um = 100 % When motor is running at 100 % of line

voltage (after starting is complete), the Umcontact is closed.

FAULT The FAULT contact closes for: an EEPROM

error or a shorted thyristor.Refer to paragraph 6.1 re SW1-4 settings.

Reset of fault simply by giving a new start signal.

Recommended Fuse Style * Two levels of short circuit protection can be provided by the user:

1. Type 1 protection is available where the short circuit protective

device protects the wiring and the integrity enclosure. The controllerwill probably damage and require replacement or repair befoe being

re-energized. Cirucit breakers and motor circuit protectors provide

this type of protection.

2. Type 2 protection is available where the short circuit protectivedevice protects both the wiring and the controller. The controller

should not require repair before re-energizing after the short circuithas been cleared. Fuses of an KR-1 type or HRC-1 type sized in

accordance with the NEC/CEC code or semiconductor type fusesprovide this kind of protection.

Type RK-1 Dual ElementPartial List of Manufacturers

Bussman LPN-RK (250V or less)LPS-RK (600V or less)

Gould A2D( )R (250V or less)A2D( )R (600V or less)

Littelfuse LLN-RK (250V or less)LLS-RK (600V or less)

User Output for ISOL Logic to Power 1500 V AC120V AC and 230V AC Rating 10 Amp Make

version 1 Amp Break1 Amp Continuous @ 120V AC / 230V AC

On Voltage Drop 1.2 V AC (typ)

On Current 25 mA (minimum)Off Leakage Current 2 mA (typ)

User Output for ISOL Logic to Power 1500 V AC

24V DC version Rating 1.5 Amp Make0.5 Amp Break

0.5 Amp Continuous @ 24VOn Voltage Drop 1.6 V DC (typ)Off Leakage Current 2 mA (typ)

* For a complete listing of Siemens SITORfuses, see Appendix A.


35/48


Current Required terminals X1, X2

Catalog 24V DC Control Voltage Number 120V AC Control Voltage Number 230V AC Control Voltage Number

Number Control Fans of fans Control Fans of fans Control Fans of fans

3RW3454 100 mA - 100 mA - 100 mA -

3RW3455 - 58 100 mA 450 mA 1 100 mA 200 mA 1 100 mA 100 mA 1

3RW3465 - 67 100 mA 300 mA 1 100 mA 150 mA 1 100 mA 75 mA 1

3RW3472 100 mA 600 mA 2 100 mA 300 mA 2 100 mA 150 mA 2

3RW3483 - 86 100 mA 900 mA 3 100 mA 450 mA 3 100 mA 225 mA 3

Operational Current Power Dissipation Surge Capacity I2t, (1/2 cycle)Catalog Rating @ Rated Current (1 cycle) Controller

Number (Amperes) (Watts) (Amps) (A2-sec)

3RW3454... 57 154 1,900 18,000

3RW3455... 69 166 3,200 80,0003RW3457... 80 192 4,400 97,000

3RW3458... 105 252 4,400 97,0003RW3465... 131 315 8,000 306,000

3RW3466... 195 468 8,000 320,0003RW3467... 248 595 14,500 1,051,0003RW3472... 361 866 6,000 460,000

3RW3483... 480 1152 14,920 1,540,0003RW3484... 720 1728 20,000 2,650,000

3RW3486... 960 2304 36,000 7,350,000

Electrical Data

Table 10 - Control Power Requirements


36/48


8 Dimensions

Catalog le, Wye Width Height Depth Mount Width Mount Height MountNumber (Amps) (W) (H) (D) Width Offset Height Offset Hole

(MW) (Q) (MH) (P) (BH)

3RW345*... 35-105 216 356 187 127/ 61 327 16 6 (4)

94

3RW346*... 131-248 292 381 189 248 22 332 27 6 (4)

3RW3472... 361 344 417 224 286 29 336 45 6 (4)

3RW3483.../84... 480, 720 442 517 231 133 (3) 18 450 32 6 (8)

3RW3486... 960 448 719 220 101/ 23 653 29 6 (8)138/

138

8.1 Dimensions (mm)

Figure 23 Dimension Drawings

94

127

23 39

101 138

133 133

138

18133


37/48


Table 11 LED Fault Indications

Indication Cause Check/Remedy

LED 1 single flashing Phase loss Verify that proper three-phase incoming power is present per

paragraph 6.5, steps 3 and 4.

Inside Delta wiring problem

See problem 2 in Table 13.

LED 1 double flashing EEPROM error Replace the logic board. Replacement instructions are included

with the new logic board. Return the faulty logic board to the fac-tory.

LED 2 double flashing Shorted SCR Check SCRs as described in paragraph 9.4.

9 Troubleshooting

9.1 Maintenance and Troubleshooting

Step 1. Regularly check (the frequency depends upon the

amount of airborne particulate matter) the fans and heatsink finsfor unimpeded air flow and check that the fans are moving

freely.

Step 2. In case of installation according to NEMA standards the

following NEMA standards should be used as the basis of apreventive maintenance program:

ICS 1.1-1984 (R1988) "Safety Guidelines for the Application,

Installation, and Maintenance of Solid State Control"

ICS 1.3-1986 (R1991) "Preventive Maintenance of IndustrialControl and Systems Equipment."

Step 3. If the torque requirements for wiring connections arenot legible, refer to UL 486E "Equipment Wiring Terminals for

use with Aluminum and/or Copper Conductors. for nominal

torque values.

Step 4. In the circumstance of a fault condition as indicated bythe opening of a short circuit protective device, refer to Annex A

("Maintenance of Motor Controllers After a Fault Condition") ofNEMA standard ICS 2-1993 "Industrial Control and Systems,

Controllers, Contactors, and Overload Relays Rated Not More

Than 2000 Volts AC or 750 Volts DC."

This checklist does not represent an exhaustive survey of main-

tenance steps necessary to ensure safe operation of the equip-ment. Particular applications may require further procedures

Should further information be desired or should particular prob-lems arise which are not covered sufficiently for the purchaser's

purposes, the matter should be referred to the local Siemens

sales office.

Dangerous voltages are present in the equipment which cancause death, serious injury, or property damage. Always deen-

ergize and ground the equipment before maintenanceMaintenance should be performed only by qualified personnel.

The use of unauthorized parts in the repair of the equipment otampering by unqualified personnel will result in dangerous con-

ditions which can cause death, serious injury, or equipmentdamage. Follow all safety instructions contained herein.

9.2 Troubleshooting Tables

Two LED indicators on the SIKOSTART controller provide fault

indications as listed in Table 11 which includes recommended

checks and remedies.

Table 12 is a general troubleshooting table listing troubles, theirpossible causes, and recommended checks and remedies.

Inside Delta wiring problems are described in Table 13.

Hazardous voltage/fire hazard.

Failure to properly maintain this equipmentcan result in death, serious injury, property

damage or product failure.The instructionsreferred to below should be carefullyreviewed, understood and followed regularly.


38/48


Trouble Cause Check/Remedy

Motor does not start Check input side of terminals L1, L2 and L3 for open dis

and LED 1 is not on. No main power connect switch, breaker trip, or insecure terminal

connections. Verify that proper three-phase incomingpower is present per paragraph 6.5, steps 3, 4 and 6.

No control power Check input side of control terminals X1 and X2 for blown

fuse, any open circuit condition or insecure terminal

connections.

Verify that proper control voltage is present (within+10%,-15% of nominal controller rating). If the control

circuit includes a control power transformer (CPT), verifythat the CPT primary voltage is present and proper for the

CPT primary tap.

Motor does not start Motor not connected Check that any series disconnect switch or

and LED 1 is to controller isolating contact is closed.glowing steadily

Check for tripped overload relay. Determine and remedy

cause of trip per Motor overload relay trips...

trouble below.

Verify that the motor is connected to the controller. With

proper incoming power and the motor connected butStopped, voltmeter readings across terminals T1 and T2,T2 and T3, and T3 and T1 should be zero. A reading of line

voltage indicates that the motor is not connected

properly.

Discontinuity in the Check that control power is present at terminals A1 and

control input circuit A2. If power is not present, check for insecure wiring

to the Run coil connections at terminals A1 and A2, at applicable controlterminals (13, 14, etc.), and at the control devices (e.g., start-

stop device, isolation contact) used in the inputcircuit to the Run coil.

Bad cable connection Remove control power and check that Logic PCBor defective printed -to-Snubber PCB cable is secure. If secure, remove main

circuit board (PCB) power and replace Logic PCB and/or snubbercomponent PCB or consult the factory for assistance.

Faulty motor Troubleshoot motor according to themanufacturers instructions.

Motor does not start

and both LEDs comeon at Run command Inside Delta wiring problem See problem 3 in table 13.

Motor starts but does Controller not finished Check that LED 2 is on, which indicates output

not come up to speed ramping to line voltage voltage equals line voltage. If motor is comingup to speed too slowly, decrease Start Time T1and/or increase Initial Voltage U; refer to

paragraph 6.6.

Motor growls or hums Initial Voltage U is set Raise setting of Initial Voltage U until motor just

at start but comes too low starts to rotate when power is first applied;up to speed refer to paragraph 6.6.

Table 12 Troubleshooting


39/48



Motor growls at start Motor unable to start load Check load for mechanical blockageand does not come (rocks, logs, seized bearings, etc.)

up to speed Increase motor size; for proper controllerselection, refer to section 3.

Controller not finished Check that LED 2 is on, which indicates outputramping to line voltage voltage equals line voltage. If motor is coming

up to speed too slowly, decrease Start Time T1and/or increase Initial Voltage U; refer to

paragraph 6.6.

Shorted SCR (LED 2

double flashing) Check SCRs as described in paragraph 9.4.

Motor comes up to Improper settings Adjust Start Time T1 and Init ial Voltagespeed too quickly or too U settings per paragraph 6.6.

slowly

Load is too light Adjust load or consider decreasing or increasing

or too heavy motor size; for proper controller selection, referto section 3.

Motor runs noisily with

very high current Inside Delta wiring problem See problem 1 in table 13.Motor starts hard,

not softly Improper setup Refer to paragraph 6.6 for motor startingadjustments.

Shorted SCR (LED 2

double flashing) Check SCRs as described in paragraph 9.3.

Inside Delta wiring problem See problem 4 in table 13.

Unsuitable delta motor A certain delta motor design (wired Inside Delta) will not

for Inside Delta wiring start softly with a high friction load (e.g., conveyor), only

with a low friction load (e.g., water pump). The soft startproduces balanced three-phase power to the motor, but it

becomes stuck at a low rpm until the end of the startramp at high current. It then jumps quickly to full speed

due to the high voltage and current. Consult the factory

for assistance.

Controller is off but Shorted SCRs Check voltage from terminal A1 to A2 tomotor is running (LED 2 double flashing) verify that Run coil is not energized. Check SCRs as

described in paragraph 9.4.

Motor overload relay Motor is overloaded

trips during starting while running Check for a mechanical cause of overload and clear.

Motor not able to Check that motor comes up to speed whenaccelerate load started by applying across-the-line full voltage directly to

the motor. An alternative is to use the controller with T1set at 0 (0.5 seconds) and U at F (80% full voltage).

a. If motor cant accelerate the load, increasemotor size; for proper controller selection,

refer to section 3.

b. If motor accelerates the load, continuechecking the following causes.

Improper overloadrelay Check overload relay to determine correct settings.

Overload relay current

transformers incorrectlywired Verify current transformer wiring per applicable diagram(s).

Table 12 Troubleshooting - Continued


40/48



Motor branch circuit Branch circuit protective Size the device in accordance with all applicable

protection trips during device incorrectly sized standards.starting or running

Check circuit breaker trip settings.

Incorrect power wiring Check all power wiring connections to determine

causing a short on Iif a phase-to-phase or phase-to-ground short is present.input or load side of

controller

9.3 Inside Delta Wiring Problems

Figure 24 shows a correct inside delta connection. With the cor-

rect connection, the motor runs properly with current limit dur-ing starting and the line and leg currents are balanced.

Table 13 lists four improper connection problems and the unsuc-

cessful response for each. The Example column illustrates

only one of many combinations that may be responsible for theproblem.

Table 13 Inside Delta Wiring Problems

Problem Response/Example

1. Reversed Winding The motor runs but makes

non-normal sounds and

the running current is very high.

2. Dead Ended Winding The controller trips out ona single phase fault.

The line with the Dead End

Winding will have no current flow.The other two lines will have very

large currents flowing.

Note: Repeated attemptsat starting with this connection

can damage the controller.

3. Dead Ended on

All Windings The motor does not start. Thereis no current flow on any of the

lines. The controller indicatorsLED 1 and LED 2 come on at the

same time when a run command

is given.

4. Starter to Fault ContactorLead Swaps The motor runs but there is no

current limiting during starting.

The line and leg currents arebalanced. Due to the phase

shift in the leg currents comparedto the controllers internal timing

for starting control, there is nocurrent limiting during

starting.

5. Switch position SW1-3 Incorrect firing pulses cause very

does not correspond high currents to flow in the motor.to the type of circuit These currents can destory the

in use soft starter.Figure 24 Proper Inside Delta Wiring Connection

L1

L2

L3

w1

w2

w3

scr1

scr2

scr3

T1

L1

L2

L3

T3

Motor

SIKOSTARTT4

T2T5

T6

L1

L3

L2

L1

T1

T4

T6

T3

L3

T5

T2

T2 L2

L1

L3

L2

L1

T1

T1

T4

T4

T6

T3

L3

T5

T5

T2

T2 L2

L1

L3

L2

L1

T1

T1T4

T4

T6

T6

T3T3

L3

T5

T5

T2

T2 L2

L1

L3

L2

L1

T1

T1

T4T4

T6

T6

T3T3

L3

T5

T5 T2

T2 L2

Table 13 - Inside Delta Wiring Problems

Problem 1 Problem 2 Problem 3 Problem 4

When the switch is set to Standard Circuit, the motor

must also be operated in the standard circuit; and

when the switch is set to star-delta the motor mustalso be operated in star-delta!

If the switch is set to a type of circuit not connected, thiscan cause very high currents to occur during operation.

These currents can destory or demage thyristors and other

components. Be sure to set the soft starter to the type ofcircuit actually in use.


41/48


9.4 Shorted SCR Checks

Perform one of the following checks to identify any shortedSCRs. These checks require no disassembly of the unit.

Extensive SCR tests are detailed in later paragraphs.

9.4.1 Resistance Check

Use an ohmmeter to check for shorted SCR(s) as follows.

1. Disconnect and lock out all power to unit.

2. Measure the resistance from the line to load terminals (L1

to T1, etc.), across each phase of the controller.

3. Any reading of less than 3,000 ohms indicates a shorted

SCR that must be replaced. Note that the reading can be ashigh as 3,000,000 ohms.

9.4.2 Voltage and Load Check

Main and control power are connected to the unit for this check.

To prevent motor operation during testing, disconnect the run

signal at terminals A1 and A2.

1. Measure AC voltage across each pole and check the load cir-cuit as described in paragraph 6.5, step 5.

2. If voltage measurements indicate a shorted SCR, replace

the SCR.

9.5 SCR (Thyristor) Functional Testing

The following basic and advanced tests may be used to verify

SCR module functionality.

9.5.1 SCR Description

SCR descriptions and illustrations are included here to help

identify the terminals for the functional tests.

The power switching device is furnished as an insulated dualSCR module. The two SCRs in each module are connected in

inverse parallel (back-to-back). One module, or power pole, in

each line gives bidirectional control of the AC voltage. Typicaconnections are shown in figure 25. Each SCR has two inter-

nally connected cathode terminations, a large power cathode

terminal, and a smaller auxiliary cathode terminal or wire for thecontrol connection.

A forward biased SCR (anode positive, cathode negative) wil

turn on and conduct current if positive control voltage is applied

to the gate terminal and gate current flows inside the SCR junc-tion to the cathode. The SCR turns on and stays on at anode

currents above the latching value. It remains on until anode cur-

rent falls below the holding value.The module and SCR characteristics listed below are represen-

tative of all modules and SCRs. The value for each characteris-

tic is a typical value.

Illustrations identifying terminals and connections for thyristorsof various current ratings are included at the end of this section


High voltage is present on all controller com-ponents except heat sinks, current transform-ers, and the basic control board. All bus bars,terminals, snubber boards and the SCRs areenergized at rated voltage.

Figure 25

K2

L TAK

A2

K1

G2

G1 K1

SCR2

SCR1

Typical Isolated Power Module

K = cathodeG = gateA = anode

L T

SCR2

SCR1

K1

G1

G2

K2

A2

A1

Typical Isolated Power Pole


42/48


9.5.2 Test Equipment

The following equipment is used for the functional tests.

1. Portable DC multimeter - volts, ohms, and amperes (analogtype preferred).

2. Insulation tester - 1,000 volt DC megohmmeter (megger)

battery operated amp probe AMB-4D or similar.

3. 9-volt battery NEDA 1604.

4. 100-ohm resistor, 1 watt minimum.

5. 20-ohm resistor, 5 watts minimum.

6. Battery clip and clip leads.

Ground or case internal insulation . . . . . . . . . .2500V AC rating

SCR reverse blocking voltage . . . . . . . . . . . .rating 1300V peak

SCR forward off state voltage . . . . . . . . . . .rating 1300V peak

Reverse leakage current and

forward off state leakage

current at room temperatureand operating voltage levels . . . . . .less than one milliamp

Gate junction typical resistance

range as measured with

typical multimeter ohms scales . . . .10 ohms to 50 ohms

Gate trigger voltage to switch on . . . . . . . . . . . . . . . . . .2V DC

Gate trigger current to switch on . . . . . . . . .100 milliamps DC

Anode circuit holding andlatching currents . . . . . . . . . . . . .300 milliamps to 1 amp

9.5.3 Basic SCR Tests

Make sure all power sources are disconnected from controllerand locked out before performing the following test. See figures

3RW34-Variador de Velocidad

Documents

Transcript of 3RW34-Variador de Velocidad