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2 Generac
®
Power Systems, Inc.
Section 1 — General Information
Generac GTS “W” Type Transfer Switch
1.1 INTRODUCTION
This manual has been prepared especially for the
purpose of familiarizing 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 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. Generac, 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 critical 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 reason,
codes require it in all standby electric system
installations.
The transfer switch consists of a solid state
intelligence circuit, a transfer mechanism and a
control panel.
1.3 TRANSFER SWITCH DATA DECAL
A DATA DECAL is permanently affixed to the transfer
switch enclosure. Use this transfer switch only with
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.
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;
undamaged 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. Generac recommends that a copy of the
SAFETY RULES be 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
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