TS 970 Transfer Switch
PM163 REV 0 20/02/05 5 Thomson Power Systems
switch must be installed in an environment where the temperature range is within +5° to +122°
Fahrenheit (-15° to +50° Celsius) and humidity range not exceeding 5%-95% non-condensing.
NOTE: The transfer switch must not be installed in a location where it is subjected to direct
sunlight on the front of the transfer switch door. In these applications, an optionally available
sun-shade kit must be installed.
3.4. POWER CABLING
All power cabling entering/exiting the enclosure must be installed in suitably sized conduit per
NEC/CEC requirements. Ampacity, type and voltage rating of current carrying conductors must
also comply with NEC/CEC requirements and local authorities having jurisdiction. To ensure
satisfactory installation of this equipment, refer to manual SECTION 10 Cable Terminal
Information regarding power cable connection tightness requirements. All mechanical and
electrical connections must be checked for tightness prior to placing this equipment in service
to ensure proper operation and to validate applicable warranty coverage.
3.5. CONTROL WIRING
All control wiring for engine start, load shed, alarm and remote test must be installed in
separate conduits from all power cabling and must utilize suitably sized conduits per NEC/CEC
requirements. All control wiring shall be sized for minimum #18 AWG. Control wiring type and
voltage rating must also comply with NEC/CEC requirements and local authorities having
jurisdiction.
NOTE: All field wiring/communication cabling that may be field installed directly onto any ATS
door mounted components must be suitably routed and protected across the door hinge to
prevent possible mechanical damage upon door opening and/or door closing.
3.6. GENERATOR SET AUTOMATIC OPERATION
The TS 970 transfer switch operates in conjunction with any generator set with remote
automatic starting capabilities utilizing a 2 wire, remote start control contact input. A dry
contact is provided for remote generator starting control (contact closes to start generator and
opens to stop generator).
3.7. LOAD TYPES
The standard TS 970 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.
3.8. UPSTREAM OVER CURRENT PROTECTION
TS 970 transfer switch models do not contain any integral over current protection and require
upstream over current protection devices for both Utility and Generator sources.
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