O&M Manual –90E1720004
Section 6 Pre-Energizing Checkout Procedure Page 23 of 52
Section 6 Pre-Energizing Checkout Procedure
Conduct a complete inspection before the switch is energized to ensure that all components
function and operate properly. Complete every step of the checkout procedure listed before
energizing the transfer switch.
1. Check all field-installed bus bar connections.
2. Check all accessible connections for tightness.
3. Check all factory and field-installed lug terminations for tightness.
4. Check the rigidity of all bus bar supports.
5. Verify the phase rotation of both the S1 and S2 sources are the same.
6. Check the enclosure for dents or other damage that reduces electrical clearances
inside the enclosure.
7. On closed transition switches. Verify that at least one of the source breakers is
equipped with a shunt trip and is wired to either the source 1 or source 2 circuit
breaker trip connections on the customer connection terminal strip.
8. Insure the transfer switch is in the utility source position (S1). On closed
transition switches, insure that the switch contacts are not closed on both sources,
by observing the position indicator on the contact shafts.
9. Remove all foam blocks, or other temporary cushioning or retaining material,
from the electrical devices.
10. If provided, open and close all circuit breakers and other operating mechanisms,
checking for correct alignment and free operation.
11. Check all relays, meters, and instrumentation to verify that all field installed
wiring connections are made properly and that the devices function properly.
To Next Page
Loading...
Need help?
General
