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Instruction Leaflet
Westinghouse Canada
30-471 (E)
Electronics, Control and Distribution Products Division
Page 1
September, 1984
Robonic II Automatic
New Information
Transfer Switches
Operation and
Maintenance Manual
Index
Warranty .........................................2
Westinghouse Offices ..................... 3
General Description ........................ 4
Component Identification ................ 7
LRO Description ............................. 5
AUTOMATIC TRANSFER SWITCH
RO Description
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Instruction Leaflet 30-471 (E) Page 2 Warranty The company warrants the apparatus to be supplied hereunder to be of the kind designated or specified. The company shall repair or replace any defective part or parts, f.o.b. the company’s factory, repair shop or warehouse, which prove to be defective under normal and proper use within one year from the date of shipment, provided that the purchaser gives the Company immediate written notice of any such defect or defects. In no event (including, but
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Instruction Leaflet 30-471 (E) Page 3 Westinghouse industrial products, and a complete line of electrical construction products, are For Supply distributed across Canada by WESCO (Westinghouse Sales & Distribution Company). For product application, delivery or pricing information, call the WESCO office nearest you. WESCO Sales Office St. John’s 726-9073 95 O’Leary Ave, Regina 525-5841 1625-8th Avenue Halifax 454-5851 3377 Kempt Rd. Saskatoon 242-1296 509-44th St E. Moncton 854-8600 400 Edinburgh
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Instruction Leaflet 30-471 (E) Page 4 General Description Mechanical Component Identification CSA Standard C22.2 No. 178-1978 defines an automatic transfer switch as, “self acting equipment for transferring one or more load conductor connections from one power source to another.” The same Standard also gives definitions for type A and type B automatic transfer switches. “Transfer” switch type A means an automatic transfer switch that does not employ integral overcurrent devices.” “Transfer switc
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Instruction Leaflet 30-471 (E) Page 5 Solid State Logic Control Panel Type LRO Robonic II Automatic Transfer Switch Rated 30 amperes through 100 amperes at 600 volts Ac maximum 50 or 60 Hertz. Emergency Normal The mechanism is a lever operated device controlled by a 120 volt unidirectional motor. The transfer motor drives a nylon cam which in turn operates a steel lever by sliding a pin along a slot in the back of the lever. The lever, in turn, operates the two breaker handles. The distance tra
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Instruction Leaflet 30-471 (E) Page 6 Type “RO” Robonic II Automatic Transfer Switch Type “PRO” Robonic II Automatic Transfer Switch A complete line rated from 150 amperes through 1000 amperes at 600 Rated 1200 amperes through 3000 amperes at 600 volts Ac or 250 volts Ac or at 250 volts Dc. volts Dc. The transfer mechanism consists of the transfer motor, a gear train and The transfer mechanism consists of a transfer motor, a gear train and two breaker operating cams. two breaker operating cams.
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Instruction Leaflet 30-471 (E) Page 7 Table 1 — Interrupting, Closing and Withstand Rating — Table 3 — Maximum Upstream Circuit Protective Devices for Robonic Type A Type A Robonics, 90% or Larger Motor Load Robonic rms symmetrical amperes Robonic Maximum Upstream Maximum Upstream Continuous Fuse-Rating¬ Rating Type 600 Vac 480 Vac 120,208,240 Vac Type Continuous Breaker Frame Size Class Class 30 to 100 amps LRO 14,000 14,000 18,000 Rating J or L K5 or R 150 to 225 amps RO 22,000 22,000 25,000 (
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Instruction Leaflet 30-471 (E) Page 8 Both under and overfrequency cards are factory calibrated at 60 Hz. Relay Driver The actual values of pickup and dropout are as follows: S#1266C77G02 Option#1A, 1B, 1C, 3A, 3B, 3C, 4A, 4B, 4C, 4D Type Dial Setting Pickup Dropout This card is used in place of any of the timing modules when Hz Hz Hz instantaneous operation is required. Underfrequency 60 57 55 Underfrequency 50 47 45 Overfrequency 60 63 65 Overfrequency 50 53 55 Undervoltage / Underfrequency Mo
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Instruction Leaflet 30-471 (E) Page 9 Adjustments The relay is incorporated in the control scheme to stop the transfer switch with both breakers open. This is to allow residual load voltage Timer and frequency modules can be adjusted as per module front to decay prior to closing on another supply which could be out of plate. Voltage sensing modules can be adjusted as follows: phase. When the timing cycle is complete, the relay re-initiates transfer to the available source. Undervoltage Module
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Instruction Leaflet 30-471 (E) Page 10 This time delay relay is an octual plug-in, sychronous motor type. It is Plant Exerciser Option# 23A, 23B, 23C complete with clutch and mechanical load switch giving one instantane- ously operated normally open contact and a timed single pole double Ratings - Input voltage 120 volts throw contact in a dust-tight grey capsule. The mechanism is con- Contact rating 20 Amps at 120 volts resistive S.P.D.T. structed to operate for the time set on the indicating d
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Instruction Leaflet 30-471 (E) Page 11 or 2. It may be used to start an engine-generator set at selected intervals, at least once per week, but without causing the transfer switch to operate and transfer the load to the generator supply. At the end of the interval it will cause the engine-generator to shutdown. INSTRUCTIONS — TO OPERATE THE ENGINE FOR AN INTERVAL ONCE EACH WEEK, WITH OR WITHOUT OPERATION OF THE TRANSFER SWITCH. 1. Extend the tabs of Dial A outwards, except those representing the
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Instruction Leaflet 30-471 (E) Page 12 Schematic of Robonic II Transfer Switch Consider the Robonic II in the normal operating position, with normal First, the normal interrupter is opened, and then the emergency power available and the normal interrupter closed. The following are interrupter is closed. At this point, the ELS (emergency limit switch) energized: U.V. (undervoltage module), TDES (time delay engine contacts change state, and the BS (motor brake) closes, preventing start), and NR (n
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Instruction Leaflet 30-471 (E) Page 13 Replacing Parts Parts List The Robonic Automatic Transfer Switch has been designed to have all Part Name Style No. components accessible and readily removable from the front of the Parts Common to Robonic II panels. The Robonic Transfer Switch is divided into two basic sections. The upper section consists of the main contacts and transfer mechanism, Plug-in Modules the lower section consisting of all the automatic control devices. Timer,1-60 sec. adjustable
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Instruction Leaflet 30-471 (E) Page 14 Trouble Shooting Guide Recommended Maintenance Symptoms Possible Causes 1. DO NOT perform dielectric tests on the equipment with the control components in the circuit. • refusal to re-transfer to normal • a voltage sensing relay did not source upon restoration energize 2. DO NOT use loctite. • emergency to normal time delay 3. Check lubricant in high speed bearings of the motor and the low relay has failed speed bearings of the gear box. For lubrication use
