TS 910 TRANSFER SWITCH
PM140 REV 2 14/01/23 58 Thomson Power Systems
14. Visually verify on the transfer switch enclosure that there are no gaps, holes, or potential
for water ingress.
b) EQUIPMENT ENERGIZATION
DANGER
HAZARD OF ELECTRICAL SHOCK, EXPLOSION, OR ARC FLASH
• This equipment must be serviced only by qualified electrical personnel utilizing safe
work practices and appropriate Personal Protective Equipment (PPE).
• Many components of this equipment operate at line voltage. DO NOT TOUCH. Use
only electrically isolated tools.
Failure to do so may cause personal injury or death
1. Confirm Utility, Generator and loads can be energized in a safe manner.
2. Energize utility supply and confirm voltage is 120/240V (or 120/208V 3 Phase) and
phasing is correct at the source.
3. Verify the status of the following indicator lights on the TSC 9 HMI faceplate:
- Utility Source Green light is “ON”
- Load on Utility Green light is “ON”
4. Run the generator manually and confirm generator supply voltage is 120/240V (or
120/208V 3 Phase) and phasing is correct at the source.
5. Verify the status of the following indicator lights on the TSC 9 HMI faceplate:
- Generator Source Red Light is “ON”
6.
Using appropriate personal protective equipment (PPE) and insulated tools/meters,
remove the transfer switch front cover while energized.
7. Verify at the transfer switch (while energized), the utility and generator supply voltage,
phasing and phase rotation is correct.
8. Manually stop generator and place the generator controls in the "AUTOMATIC" position.
9. To confirm automatic starting and load transferring of the generator, perform the following
steps:
a) To test, press and hold the “T” pushbutton on the TSC 9 controller faceplate for 2
seconds until light above pushbutton comes ON. The generator will star
transfer on load per Automatic Sequence.
b) To determine correct operation, observe the following on the TSC 9 faceplate:
- Gen Start Red light is “ON”
- Gen Source Red light is “ON”
- Load on Gen Red light is “ON
10. To stop the generator and transfer load back to the utility supply, press and hold the “T”
pushbutton for 2 seconds until light above pushbutton goes OFF. The load will re-
transfer back to the utility power as per Automatic Sequence.
11. Perform a utility power outage test by opening the upstream utility feeder breaker. The
TSC 9 controller Utility supply light will turn off; the generator set will start after the 3-
second engine start delay has expired, the generator should start and transfer on load as
per Automatic Sequence.
12. Return the transfer switch to utility power by re-closing the upstream utility breaker. The
load should re-transfer back to the utility supply as per Automatic Sequence.
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