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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 appli-
cation, or improper procedures.
Every effort has been expended to make sure that the
contents of this manual are both accurate and cur-
rent. 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
critical electrical loads from a UTILITY (NORMAL)
power source to an EMERGENCY (GNERATOR)
power source.
The transfer switch prevents electrical feedback
between the UTILITY and EMERGENCY sources. For
that reason, electrical codes require a transfer switch
in all standby electric system installations.
When the transfer switch is connected to the engine
generator control panel, the control panel constantly
monitors the UTILITY voltage and controls the opera-
tion of the transfer switch.
Should the UTILITY voltage drop below a preset value,
and remain at this low voltage for a preset amount of
time, the generator cranks and starts. After the gen-
erator starts, the transfer switch transfers the load
circuits to the generator, the generator then supplies
the loads. When UTILITY returns above a preset level
the load is transferred back to the UTILITY and the
generator shuts down.
2
Section 1 — General Information
RTS "HS" Type Transfer Switch
1.3
TRANSFER SWITCH DATA LABEL
A DATA LABEL is permanently affixed to the transfer
switch enclosure. Use this transfer switch only with
the specific limits shown on the DATA LABEL 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 LABEL.
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) and UL 3R type.
UL and 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 equip-
ment, read the SAFETY RULES (inside front cover)
carefully. Comply strictly with all SAFETY RULES
to prevent accidents and/or damage to the equip-
ment. The manufacturer recommends a copy of the
SAFETY RULES are made and posted near the trans-
fer 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 stan-
dard to ensure correct and current information.
NOTE:
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