Westinghouse 30-471E User Manual
Westinghouse Canada
Electronics, Control and Distribution Products Division
Instruction Leaflet
30-471 (E)
Page 1
September, 1984
New Information
AUTOMATIC TRANSFER SWITCH
Robonic II Automatic
Transfer Switches
Operation and
Maintenance Manual
Index
Warranty ......................................... 2
Westinghouse Offices ..................... 3
General Description ........................4
Component Identification ................ 7
LRO Description ............................. 5
RO Description ............................... 6
PRO Description ............................. 6
Application Information ................... 7
Logic Control .................................. 7
Replacing Parts ............................ 13
Trouble Shooting Guide ................14
Recommended Maintenance ........ 14
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 not limited to the
negligence of the Company, it’s 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 damage immediately on receipt. In
case of damage call the carriers concerned at once for inspection,
and request an inspection report. Do not write to us first - notify
the carrier instead. If this precaution is not taken we cannot assist
you in recovering the amount of the claim against the carrier.
Instruction Leaflet
30-471 (E)
Page 3
For Supply
Westinghouse industrial products, and a complete line of electrical construction products, are
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 Dr. Calgary 253-7561 810-59th AveSE
Chicoutimi 549-0368 1533, boul. Talbot Calgary 253-756 11316-11th Ave SW
Montreal 631-9471 2125, 23 ave. Edmonton 452-7920 14760-116th Ave NW
Quebec 656-1025 2385, rue Watt Edmonton 437-3660 4484-97 St NW
Rimouski 724-9224 170 rue industrielle Red Deer 343-2113 1-7743 - 50th Avenue
Sept-Iles 962-6552 253, avenue Joliette Abbotsford 859-3111 34446 S. Fraser Way
Hamilton 528-8811 1910 Barton St. E. Kamloops 374-2112 961A Laval Cresent
Kitchener 893-6630 10 Goodrich Drive Kelowna 860-3918 1936 Kent Road
London 1-800-265-8241 Nanaimo 758-1777 1809 Freemont Road
Ottawa 733-2500 1800 Bank St. Prince George 562-3306 2223 Nicholson St N.
Sarnia 336-0722 1127 N. McGregor St. Surrey 588-6501 13811-103rd Avenue
Sudbury 673-8413 48 Pacific Ave. Trail 368-6474 1050 Eldorado St.
Thunder Bay 622-0638 700 Norah Crescent Vancouver 688-0277 1000 Beach Avenue
Toronto 445-0550 840 York Mills Rd. Victoria 382-7265 481 Cecelia Road
Windsor 966-2300 59 Eugenie St. E. Burnaby 299-5566 6000 Lougheed Hwy.
Winnipeg 772-9401 1460 Ellice Avenue
Westinghouse products for electrical utilities are available through the listed Utility Sales offices.
Call the office nearest you.
For Service
Utility Sales Offices
Fredericton 454-6952 460-440King St. Winnipeg 772-9906 1460 Ellice Acve.
Halifax 422-4441 720 Barrington St Tower Calgary 265-1204 707-324 8th Ave SW
Montreal 842-2566 2723-1, Complexe Desjardins Edmonton 428-7540 516-10303 Jasper Ave
Toronto 595-9551 1012-790 Bay St. Burnaby 299-5566 6000 Lougheed Hwy.
Westinghouse Service Centres provide after-sales service, installation and start-up supervision,
also testing and inspection, system verification, field repairs, alignment and balancing, rewind of
all types of motors and generators, modification and rebuilding for all makes of electrical and
mechanical equipment. Call the centre nearest you for service at all hrs.
Service Centres
St. John’s 722-7282 89 O’Leary Ave, Sudbury 674-3356 48 Pacific Avenue
Dartmouth 469-8400 71 Wright Avenue Swastika 642-3252 Westinghouse Ave.
Sydney 562-2242 RR2 Marion Bridge Thunder Bay 577-4267 635 Mountdale Avenue
Moncton 382-4457 80 Enterprise St. Toronto 255-8551 55 Goldthorne Ave.
Campbellton 753-3590 144 Water Street Windsor 944-0121 4080 E.C. Row Ave. E.
Saint John 542-7708 71 Crown Street Winnipeg 775-8643 1460 Elice Avenue
Montreal 748-8811 180, rue Authier Regina 352-5606 545 Dewdney Ave. E.
Quebec 656-1026 2385, rue Watt Saskatoon 934-5251 800-47th Street E.
Sept-Iles 962-9803 180, rue Maltais Calgary 273-0991 1856 Centre Ave. S.E.
Chicoutimi 549-6968 1533 Boul. Talbot Edmonton 465-7541 8011 Davies Rd., NW
Hamilton 545-1151 717 Woodward Ave. Ft. McMurray 743-8123 8204 Fraser Avenue
Kingston 389-8565 637 Justus Drive Nanaimo 758-9171 2311 McCullough Road
Kitchener 744-1161 20 Alpine Court Prince George 562-5571 2235 Nicholson St N.
London 453-0470 45 Pacific Court Vancouver 278-9841 13300 Vulcan Way
St. Catharines 277-1020 475 Glendale Avenue
Sarnia 337-3285 348 Queen Street S.
You can be sure...if it’s Westinghouse
Instruction Leaflet
30-471 (E)
Page 4
General Description
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 switch,
type B means an automatic transfer switch that (does) employ integral
overcurrent protection”. Westinghouse Robonics in type A are
equipped with special instantaneous magnetic only interrupter. The trip
settings of these special interrupter are set (and fixed) at higher than
standard values. They are intended to trip only if the upstream
protective device fails to clear a fault. Incorporating these special
magnetic only interrupter, a type A Robonic operates in exactly the
same way as a transfer switch not having this feature. In the event that
both devices trip, the Robonics control circuitry will automatically
initiate transfer to the alternate source. The transfer operation will reset
the “tripped” magnetic only interrupter. Information on instantaneous
trip value, interrupting, closing and withstand ratings, and recommendations for maximum upstream protective devices for type A Robonics,
are given in tables 1, 2, 3 on page 7. The information given in these
tables is necessary for proper application. Type B “Robonics” are
equipped with standard thermal-magnetic breakers which will provide
the required overload 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 protection.
For application information or assistance with type B Robonics, refer to
Westinghouse.
The Robonic II provides automatic transfer of an electrical load to a
stand-by power supply in the event of drop or loss of voltage of any or
all phases of the normal power supply. Upon the restoration of the
normal supply, the electrical load is automatically re-transferred to the
normal power supply.
The transfer motor utilizes the power from the source to which the
electrical load is being transferred. The mechanism is also designed to
leave both breakers trip free in the closed position, permitting incorporation of the thermal and short-circuit protection in either or both
breakers. In the higher ampacity models, type RO and PRO, an alarm
switch contact is supplied. This contact is connected in the transfer
motor circuit to lock the motor circuit out of operation when the
breaker(s) trip on an overload or short-circuit condition. Then the
breaker has to be manually reset. Instructions for the reset procedure
are located on the front of the operating mechanism.
Mechanical Component Identification
Type RO
All of the control modules are plug-in units which are easily replaced.
Type LRO
Solid State Logic Control Panel
Instruction Leaflet
30-471 (E)
Page 5
Type LRO Robonic II Automatic Transfer Switch
Rated 30 amperes through 100 amperes at 600 volts Ac maximum 50
or 60 Hertz.
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 travelled is
determined by two projections on the cam. These projections operate
two micro switches (NLS, ELS) which in turn disconnect the power to
the transfer motor causing a brake to operate.
The type LRO has three operating positions. They are the normal
breaker closed and the emergency breaker open, the emergency
breaker closed and the normal breaker open or both the normal and
emergency breakers open 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
hole in the operating cam and replace the slide pin.
The various automatic control components are described under the
section titled “Logic Control”.
Emergency Normal
Pivot Post
Operating Arm
Projection To
Operate Limit Switch
Slide
Pin
Cam
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