8.2 Grounding
The breaker cabinet includes a standard NEMA 2 hole drilled stainless steel pad on the rear
for grounding. Any voltage transformers used should be grounded to the main ground wire
leading from the breaker to ground.
To ground the control cabinet, use the connector provided which accepts a #6 - 2/0 AWG
conductor. Ground the control cabinet to the main ground wire from this external connector.
All ground wire used must be #6 AWG minimum.
8.3 Arrester Protection
ABB recommends that surge arresters be properly applied in the substation.
8.4 Control Power
Supply the control power as indicated on the wiring diagram. If 240 VAC is used, verify the
connections for the heaters before applying power.
For breakers not equipped with DIN-Rail style connectors, check all terminal block
connections for proper tightness.
For details of the overall control circuit refer to the specific wiring diagrams supplied with the
breaker.
8.5 Final Inspection
When the breaker has been installed and all mechanical and electrical connections
completed, EXCEPT ENERGIZING THE POWER LINE, the following points of inspection are
recommended:
1. Ensure the breaker is properly leveled and securely anchored.
2. Make a final check of tightness of all hardware.
3. Check that the heaters work.
4. Securely tighten terminal and ground connections.
5. Check control cable entrance fittings for tightness.
6. Operate the breaker from the control box to verify normal operation.
7. Secure all doors and ensure proper gasketing for weather.
8. Ensure that all tools are removed.
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