9.
5
.1
INTRODUCTION
This manual has been prepared especially for the purpose of familiar-
izing personnel with the design, application, installation, operation
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 careless-
ness, 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.
9.
5
.2
EQUIPMENT DESCRIPTION
The automatic transfer switch is used for transferring electrical
load from a UTILITY (NORMAL) power source to an GENERATOR
(STANDBY) power source. Such a transfer of electrical loads occurs
automatically when the UTILITY power source has failed or is sub-
stantially reduced and the GENERATOR source voltage and frequen-
cy have reached an acceptable level. The transfer switch prevents
electrical feedback between two different power sources (such as
the UTILITY and GENERATOR sources) and, for that reason, codes
require it in all standby electric system installations.
The transfer switch consists of a transfer mechanism, UTILITY SER-
VICE DISCONNECT circuit breaker, a relay control, fuses, and a
terminal strip for connection of sensing wires.
This transfer switch is suitable for use as service entrance equip-
ment as it meets the requirements of CSA C22.2, No. 178 for type B
transfer switches.
9.
5
.3
TRANSFER SWITCH MECHANISM
These switches are used with a single-phase system, when the
single-phase NEUTRAL line is to be connected to a Neutral Lug and
is not to be switched.
Solderless, screw-type terminal lugs are standard.
Switch
Wire
Conductor Tightening
Rating
Range
Torque
100A
#14-1/0 AWG
50 in-lbs.
200A Utility
#6-350 MCM
375 in-lbs.
200A Load &
Generator
#6-250 MCM
275 in-lbs.
This transfer switch is suitable for control of motors, electric discharge
lamps, tungsten filament and electric heating equipment where the
sum of motor full load ampere ratings and the ampere ratings of other
loads do not exceed the ampere rating of the switch and the tungsten
load does not exceed 30 percent of the switch rating.
This CSA certified transfer switch is for use in optional standby sys-
tems only.
This transfer switch is suitable for use on a circuit capable of 22,000
rms (200A) and 10,000 (100A) symmetrical amperes, 240 VAC
maximum.
Larson Electronics, LLC
Phone: (877) 348-9680
Fax: (903) 498-3364
www.larsonelectronics.com
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