APPENDIX “A”
THOMSON TECHNOLOGY
©
TYPICAL AUTOMATIC TRANSFER SWITCH
COMMISSIONING PROCEDURES
Model Series TS 840
9087A - 198
th
Street, Langley, B.C. Canada V1M 3B1
•
Telephone (604) 888-0110
•
Telefax (604) 888-3370
CAUTION: FAILURE TO OBTAIN THE CORRECT ATS PHASING WILL
RESULT IN EQUIPMENT MALFUNCTION AND DAMAGE.
3) Confirm cable size is correct for the lugs supplied in the transfer switch (line and
load). Confirm the cables were meggered by the electrical contractor to ensure
no cross phase connections or conduction to ground.
4) Confirm cable lugs are properly torqued. Confirm cable installation; ensure the
cables do not interfere with normal equipment operation or which may cause
component damage.
5) Manually operate the transfer mechanism to the appropriate source of supply
using the manual operation handle. Leave the Isolation Plug disconnected until
final Transfer Switch Commissioning is to be completed.
Final Commissioning
1) Verify installation of the Automatic Transfer Switch as per installation manual and
verify wiring (also see the Pre-Commissioning Checks). Confirm phase, neutral
and grounding conductors are installed as per electrical code requirements
. Note
:
Confirm neutral conductors of both sources are correctly installed and are solidly
grounded for 3 phase 4 wire configurations.
2) Check for mechanical damage (shipping or installer).
3) Verify correct control wire interconnects to the engine/generator set auto
start/stop circuitry. Ensure the engine controller automatic start circuit does not
draw more than 5.0 amps (resistive) across the TSC 80 Engine Start contact.
The TSC80 Engine Start contact is voltage free and the only voltage measured
should result from the engine controllers internal control logic.
Note
: The ATS
Engine Start contact CLOSES to start the engine and OPENS to stop the engine.
4) Place the generator engine controller in the "OFF" position and open the
generator local circuit breaker.
5) Ensure the ATS isolation plug is disconnected prior to application of voltage of the
supply sources.
6) Energize the utility supply and the generator supply sources and verify these
meet the correct voltage, phasing and phase rotation for the ATS and system.
Once these have been confirmed to be correct, de-energize both sources before
installing the isolation plug.
7) Once the isolation plug is connected, the ATS and system load may be energized
with utility power once the site electrical contractor and or owner (as required)
give authorization to proceed.
8) If Utility power is within nominal limits, the ATS should transfer to the utility
source. To determine correct operation, observe the following on the TSC 80
faceplate:
i) Utility Source green LED is “ON”
ii) Green LED above mimic bus for the Utility source is “ON”
