Westinghouse 30-470 E User Manual
Westinghouse Canada
Switchgear and Control Division
Instruction Leaflet
30-470 (E)
Page 1
October, 1979
Supersedes issue dated October, 1975
Instruction 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
Instruction Leaflet
30-470 (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 Companys 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, 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 damage immediately on
receipt. In case of fire 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
30-470 (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 near you.
WESCO Sales Offices
Abbotsford 859-3111 34446 South Fraser Way Red Deer 343-2113 1-7743 50th Avenue
Calgary 253-7561 810-59th Avenue S.E. Regina 525-5841 1625-8th Avenue
Calgary 253-7561 1316-11th Avenue S.W. Rimouski 724-9224 46, rue St-Germain est
Chicoutimi 549-0368 1533,boulevard Talbot St. Johns 726-9073 95 Oleary Avenue
Corner Brook 639-9771 46 Raymond Heights Sarnia 336-0722 1127 North McGregor Rd.
Edmonton 452-7920 14760-116th Avenue Saskatoon 242-1296 509-44th Street East
Edmonton 478-7757 13475 Fort Road Sept-Iles 962-6552 253, avenue Joliette
Edmonton 465-0311 7549-72A Street Sudbury 673-8413 97 St. George Street
Halifax 454-5851 3377 Kempt Road Surrey 588-6501 13514-106th Avenue
Hamilton 528-8811 1910 Barton Street East Thunder Bay 622-0638 700 Norah Crescent
Kamloops 374-2112 705 Notre Dame Drive Toronto 445-0550 840 York Mills Rd. Don Mills
Kelowna 860-3918 1936 Kent Road Trail 368-6474 860 Eldorado Street
Kitchener 893-6630 10 Goodrich Drive Vancouver 682-5533 1000 Beach Avenue
Moncton 854-8600 400 Edinburgh Drive Victoria 382-7265 481 Cecelia Road
Montreal 631-9471 2125, 23e avenue Lachine Windsor 966-2300 59 Eugenie Street East
Ottawa 733-2500 1800 Bank Street Winnipeg 772-9401 1460 Ellice Avenue
Prince George 562-3306 2223 Nicholson Street N.
Quebec 656-1025 2385, rue Watt Ste-Foy
Westinghouse products for electrical utilities are available through the listed Utility Sales offices.
Call the office nearest you.
For Service
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 provide after-sales service, installation and start-up
supervision, also testing and inspection, systems 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 hours.
Apparatus Service Centres
Calgary 273-0991 1857 Centre Avenue S.E. St. Catharines 682-8336 234 Welland Avenue
Dartmouth 469-8400 71 Wright Avenue Burnside St. Catherines 688-2263 5 Seapark Dr.(Marine Serv)
Edmonton 465-7541 8011 Davies Road St. Johns 722-7282 89 OLeary Avenue
Fort McMurray 743-8123 8204 Fraser Avenue Sarnia 337-3285 348 Queen Street South
Hamilton 545-1151 717 Woodward Avenue Saskatoon 653-4313 800-47th Street East
Kingston 389-8565 639B Justus Drive Sept-Iles 962-9803 180, rue Maltais
Kitchener 893-7420 350 Manitou Drive Sudbury 522-3210 1360 Kelly Lake Road
London 453-0470 1921 Huron Street East Swastika 642-3252 Westinghouse Avenue
Medicine Hat 526-0759 1248 Brier Parkway N.W. Sydney 562-2242 RR2 Marion Bridge
Moncton 382-4457 80 Entreprise Street Thunder Bay 577-4267 635 Mountain Avenue
Montreal 748-8811 180, rue Authier St-Laurent Toronto 255-8551 55 Goldthorne Ave.
Nanaimo 758-9171 2311 McCullough Road Vancouver 278-9841 1330 Vulcan Way
Prince George 562-5571 2235 Nicholson Street N. Windsor 944-0121 4080 E.C. Row Unit 22, RR1
Quebec 656-1026 2385, rue Watt, Ste-Foy Winnipeg 775-8643 1460 Ellice Avenue
Regina 352-5606 545 Dewdney Avenue East
Instruction Leaflet
30-470 (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.
Transfer switch type A means an automatic transfer switch that
does not employ integral overcurrent devices. Transfer switch, type B
means an automatic switch that (does) employ integral overcurrent
protection. Westinghouse Robonic automatic transfer switches are
available in both types. Robonics in type A are equipped with special
instantaneous magnetic only breakers. The trip settings of these
special breakers are set (and fixed) at higher than standard values so
that they will trip only if the upstream circuit protective device trips.
Incorporating these special magnetic only breakers, 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 upstream protective
device and the magnetic only breaker in the Robonic) the Robonics
control circuitry will automatically initiate transfer to the alternate
source. The transfer operation will reset the tripped magnetic only
breaker.
Mechanical Component Identification
Type LRO
Information on interrupting, closing and withstand ratings, and
recommendations for maximum upstream protective devices for type
A Robonics, are given in tables 1, 2 and 3, on page 7.
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. 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 or
all phases of the normal power supply. Upon the restoration of the
normal supply, the electrical load is automatically retransferred to the
normal power supply.
The transfer motor utilizes the power from the source to which the
electrical load is being transferred. The mechanism provides a positive
mechanical interlock to prevent both breakers being closed at the
same time. The mechanism is also designed to leave both breakers trip
free in the closed position, permitting incorporation of 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.
Most of the control components are plug-in units which are easily
replaced.
Type RO
1. Normal Source Connections
2. Emergency Source Connection
3. Load Connections
4. Neutral Connections
5. Control Panel
6. Transfer Mechanism
7. Customer Connections
8. Control & Sensing Transformers
9. Transfer Motor
Type PRO
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