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Westinghouse Switch User Manual Download Page 11

Instruction Leaflet

30-470 (E)

Page 11

Replacing  Parts

The Robonic Automatic Transfer Switch has been designed to have all

components accessible and readily removable from the front of the

panels. The Robonic Transfer Switch is divided into two basic

sections. The upper section consists of the main contacts and

transfer mechanism, the lower section consists of all the automatic

control  devices.

Caution

When replacing any parts of the mechanism, control transformers or

breakers, isolate the Robonic Transfer Switch from any possible

source  of  power.

To remove the transfer mechanism of the LRO transfer switch, first

open the cover and remove the slide pin from the operating cam, then

remove the centre bolt, the mechanism will lift straight off. The

breakers  and  transfer  motor  bracket  are  held  by  four  screws  for  ease

of removal and replacement. When replacing the mechanism, first set

it on the Robonic with the breaker handles in the holes provided and

then fasten the centre bolt reasonably tight with the mechanism fully

movable with an equivalent swing distance up and down.

To remove the transfer mechanism of the RO transfer switch, remove

the four bolts holding it, taking note of which holes the bolts were in,

then lift the mechanism straight off. The breakers are held by two

bolts at one end and the bus connectors on the other end. The

transfer motor is mounted to the transfer mechanism cover and centre

drive gear. When replacing any part of the transfer mechanism, be

sure that the scribe lines of the gears are in a straight row (example

shown  below).

When replacing the mechanism move it about until the breaker toggles

fit between the mechanism fingers and then fasten the bolts tightly. To

test for proper operation first operate manually and then connect 120

volt, 60 hertz supply to motor leads and observe operation for free

movement and proper breaker operation.

The PRO transfer switch mechanism is similar to the RO with the

exception that the PRO mechanism has five gears and is mounted

horizontally. The breakers are fastened to the panel by six bolts.

All Robonic transfer switch breakers and mechanisms have allowed

some adjustments for mounting to assure proper operation without

slipping or binding. Be sure all hardware is tightened sufficiently

before  reenergizing  any  transfer  switch.

To replace any of the octal plug-in relays, pull old units straight out and

insert the replacement unit. Some of the timing relays have white clips

on the top and bottom to be released first. Due to the tight fit of the

receptacle and pins, you may have to move the relay about a little to

pull it out. 

DO NOT INTERCHANGE ANY RELAY WITH ANY OTHERS.

To prevent operation of the transfer switch while replacing mechanism

or  components,  disconnect  all  source  of  power.

SCRIBE LINE

Parts  List

Part Name

Style No.

Parts  Common  to  all  Robonics

Control Relay

3155A21H01

Voltage Sensor Fixed

3152A50H01

Voltage  Sensor  Adjustable

3152A50H02

Timer On Delay 5–180 sec.

688A887H03

Timer On Delay 20 s–10 m

688A887H04

Timer On Delay 1–30 m

688A887H05

Timer Off Delay 1–300 sec.

688A886H11

Timer Off Delay 2.5 s fixed

3152A51H01

Instantaneous Relay

3152A52H01

Socket Potter & Brumfield

3152A52H02

Socket Omron

688A887H01

Plant Exerciser

688A888H01

Battery Charger 12V

1259C26G01

Battery Charger 24V

1259C26G03

4 Position s/s fixed

3151A90H01

4 Position s/s keyed

3151A90H02

Terminal Block 300V

688A133H01

125V Control Transformer 600V

573B414H01

125VA  Control  Transformer  480/416V

573B414H02

125VA  Control  Transformer  240/208V

573B414H03

Sensing  Transformer  600V

573G414H04

Sensing  Transformer  480V

573B414H05

Sensing  Transformer  416V

573B414H06

Sensing  Transformer  208V

573B414H07

For  Type  LRO  Robonics

Mechanism

833C222G02

Motor  Assembly

833C223G01

Motor

688A732H02

Operating Cam

688A548G01

Slide Pin

688A731H01

Limit  Switches

688A747H01

For  Type  RO  Robonics

Mechanism 150 to 400A

833C226G01

Mechanism 600 to 1000A

833C226G01

Motor

688A749H01

Solenoid

688A740H01

Brake Shoe Assembly

688A738G01

Operating Cam

572B774H01

Auxiliary & Limit Switch

688A747H01

For Type PRO Robonic

Mechanism

688A109G01

Motor

688A749H02

Solenoid

688A740H01

Auxiliary & Limit Switch

688A747H01

300VA  Control  Transformer  600V/480V

554B408H04

Summary of Contents for Switch

Page 1: ... Leaflet 30 470 E Pages 1 12 Automatic Transfer Switches Index Warranty 2 Westinghouse Offices 3 General Description 4 Component Identification 5 LRO Description 5 RO Description 6 PRO Description 6 Application Information 7 Automatic Control 7 Replacing Parts 11 Trouble Shooting Guide 12 Recommended Maintenance 12 Operation and Maintenance Manual ...

Page 2: ...d to the negligence of the Company its employees or agents shall the Company be liable for special or consequential damages or damages for loss of use and on expiration of the Warranty period any liability of the Company shall terminate This constitutes the only warranty of the Company and no other warranty or condition statutory or otherwise shall be implied Important Check equipment for shipping...

Page 3: ...rest you Utility Sales Offices Calgary 265 1204 807 324 8th Avenue S W Montreal 812 2566 2723 1 Complexe Dejardins Edmonton 428 7540 303 10506 Jasper Avenue Toronto 595 9551 1012 790 Bay Street Fredericton 454 6952 460 440 King Street Vancouver 689 4243 2699 Harbour Centre Halifax 422 2221 720 Barrington Street Tower Winnipeg 475 9080 1146 Waverley St Bldg D Westinghouse Apparatus Service Centres ...

Page 4: ...load and short circuit protection Type B Robonics can also be built using Seltronic or SCB breakers which could include ground fault tripping as well as overload and short circuit For application information or assistance with type B Robonics refer to Westinghouse The Robonic provides automatic transfer of an electrical load to a standby power supply in the event of drop or loss of voltage of any ...

Page 5: ...n but never both normal and emergency breakers closed The type LRO can also be easily manually operated Open the lever cover remove the slide pin and place it in the hole supplied in the lever cover and close the cover Then the lever can be manually operated for what ever position desired without interference by the automatic control For automatic control again simply align the lever slot with the...

Page 6: ... will seek the power available The various control components are described under the section titled Automatic Control Type PRO Robonic Automatic Transfer Switch Rated 1200 amperes through 3000 amperes at 600 volts Ac or 250 volts Dc The transfer mechanism consists of a transfer motor a gear train and two breaker operating cams Spur Gear Meshing Relationship bottom view of top cover The transfer m...

Page 7: ...ker Frame Size Rating amperes Class J or L Class K5 or R 30 70 100 EHB FB HFB FB P 300 100 LA P c w 400 LAP10 150 225 CA JA KA HKA LA 400 225 HLA LB HLB MA NB LA P NB P c w 1000 NB14 MC NC 400 LA HCA LA P LB MA 600 400 HMA NB HNB NB P MC HMC NC HNC 600 MA HMA MC HMC 1200 600 NB NC HNC NB P 800 MA HMA NB HNB 1200 NB P MC HMC NC HNC 1000 NB HNB NC HNC PB P 1200 1200 NB HNB NC HNC PB P 1200 1400 2000...

Page 8: ...on momentary return of the normal power source Upon restoration of the normal source it begins timing and should the source fail again prior to completing the timing cycle the relay will reset to time again If the normal power source should remain restored longer than the timing cycle the EN will open its normally closed contact in the control relay CR initiating re transfer When used as an NE dev...

Page 9: ... to the emergency position Control Relay CR Ratings 1 2 volt amperes power consumption Input Coil Voltage 120 volts 60 hertz and 50 hertz Contact Rating 10 amperes resistive Operating Temperatures 10 C to 55 C Settings 50 hertz fixed sensing or 60 hertz fixed sensing Description This device CR is an octal plug in unit complete with solid state sensing single pole double throw set of contacts two s...

Page 10: ... switches 1 It may be used to simulate an interruption in the normal source of supply at selected intervals at least once per week causing the transfer switch components to function including start up of the engine generator set and transfer of load to the generator supply At the end of the interval it will initiate the transfer back to normal supply and shut down the engine generator or 2 It may ...

Page 11: ...d horizontally The breakers are fastened to the panel by six bolts All Robonic transfer switch breakers and mechanisms have allowed some adjustments for mounting to assure proper operation without slipping or binding Be sure all hardware is tightened sufficiently before reenergizing any transfer switch To replace any of the octal plug in relays pull old units straight out and insert the replacemen...

Page 12: ...ectric tests on the equipment with the control components in the circuit 2 DO NOT use loctite 3 Check lubricant in high speed bearings of the motor and the low speed bearings of the gear box For lubrication use Dow Corning Silicon DC44 or equivalent on the high speed bearings and Aero Shell No 6 grease or equivalent in gear box after 5000 operations 4 Check if control components are tight in socke...

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