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1.1
INTRODUCTION
This manual has been prepared especially for the purpose of famil-
iarizing personnel with the design, application, installation, opera-
tion and servicing of the applicable equipment. Read the manual
carefully and comply with all instructions. This will help to prevent
accidents or damage to equipment that might otherwise be caused
by carelessness, incorrect application, or improper procedures.
Every effort has been expended to make sure that the contents
of this manual are both accurate and current. The manufacturer,
however, reserves the right to change, alter or otherwise improve
the product at any time without prior notice.
1.2
EQUIPMENT DESCRIPTION
The automatic transfer switch is used for transferring electrical
load from a UTILITY (NORMAL) power source to a EMERGENCY
( STANDBY) power source. Such a transfer of electrical loads
occurs automatically when the UTILITY power source has failed or
is substantially reduced and the EMERGENCY source voltage and
frequency have reached an acceptable level. The transfer switch
prevents electrical feedback between two different power sources
(such as the UTILITY and EMERGENCY sources) and, for that rea-
son, codes require it in all standby electric system installations.
The transfer switch consists of a transfer mechanism, a relay con-
trol, and a terminal strip for connection of sensing wires.
This switch is suitable for control of motors, electric discharge
lamps, tungsten filament and electric heating equipment and the
tungsten load does not exceed 30% of the switch rating.
The transfer switch is for use in optional standby systems only.
A 100A rated switch is suitable for use on circuits capable of
delivering not more than 10,000 RMS symetrical amperes, 250
VAC maximum, when protecty by a 100A maximum circuit breaker
(Siemens types QP or BQ) or 150A maximum circuit breaker
(Square D Q2, Westinghouse CA-CAH, General Electric TQ2 and
Siemens QJ2).
A 200A rated switch is suitable for use on a circuit capable of
10,000 rms symmetrical amperes, 240 VAC when protected by
a circuit breaker without an adjustable short time response or by
fuses.
2
Section 1 — General Information
RTS "HS" Type Transfer Switch
1.3
TRANSFER SWITCH DATA
DECAL
A DATA DECAL is permanently affixed to the transfer switch enclo-
sure. Use this transfer switch only within the specific limits shown
on the DATA DECAL and on other decals and labels that may be
affixed to the switch. This will prevent damage to equipment and
property.
When requesting information or ordering parts for this equipment,
make sure to include all information from the DATA DECAL.
Record the Model and Serial numbers in the space provided below
for future reference.
MODEL #
SERIAL #
1.4
TRANSFER SWITCH
ENCLOSURE
The standard switch enclosure is a National Electrical Manufacturer's
Association (NEMA) 3R type. NEMA 3R type enclosures primarily
provide a degree of protection against falling rain and sleet and is
not damaged by the formation of ice on the enclosure.
1.5
SAFE USE OF TRANSFER
SWITCH
Before installing, operating or servicing this equipment, read the
SAFETY RULES (inside front cover) carefully. Comply strictly
with all SAFETY RULES to prevent accidents and/or damage to
the equipment. The manufacturer recommends that a copy of the
SAFETY RULES are posted near the transfer switch. Also, be sure
to read all instructions and information found on tags, labels and
decals affixed to the equipment.
Two publications that outline the safe use of transfer switches are
the following:
•
NFPA 70; National Electrical Code
•
UL 1008, STANDARD FOR SAFETY-AUTOMATIC TRANSFER
SWITCHES
It is essential to use the latest version of any standard to ensure
correct and current information.
NOTE:
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