Product Manual

General Information
Automatic Transfer Switch Owner’s Manual 5
Section 2: General Information
Unpacking
Carefully unpack the transfer switch. Inspect closely for
any damage that might have occurred during shipment.
The purchaser must file with the carrier any claims for
loss or damage incurred while in transit.
Check that all packing material is completely removed
from the switch prior to installation.
Equipment Description
This automatic transfer switch is used for transferring
electrical load from a utility (normal) power source to a
generator (standby) power source. Transfer of electrical
loads occurs automatically when the utility power source
has failed or is substantially reduced and the generator
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 generator sources) and, for that reason,
codes require it in all standby electric system installations.
The transfer switch consists of a transfer mechanism,
utility service disconnect circuit breaker, a control relay, a
Smart A/C module, fuses, terminal strip, and fuse holder
for connection of sensing wires.
Transfer Switch Mechanism
See Figure 2-1. This switch is 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.
The conductor size range is as follows:
This transfer switch is suitable for control of motors, electric
discharge lamps, tungsten filament lamps, 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 UL listed transfer switch is for use in optional
standby systems only (NEC article 702).
The switch is suitable for use on a circuit capable of
delivering not more than 22,000 RMS symmetrical
amperes, 240 VAC maximum when used with Siemens
or Murray 1 inch breakers.
Figure 2-1. Typical Single-Phase ATS Transfer
Mechanism
Switch
Rating
Wire Range
Conductor
Tightening Torque
200A #6-250 MCM (Cu/Al) 275 in-lbs (31 Nm)
A Utility Closing Coil
B Generator Closing Coil
C Utility Lugs (N1 & N2)
D Generator Lugs (E1 & E2)
E Load Lugs (T1 & T2)
000219
A
B
C
D
E