MuhammadFaheemMustaqee
Member
- Location
- Ras tanura
- Occupation
- Electrical inspector
If all SAT activities for an MV switchgear have already been completed and the plan is to energize it in phases as follows:
Phase 1: Only the incomer breaker is closed. The busbar is energized (highlighted in red), while all outgoing feeders are isolated (open and racked out, shown in gray).
Phase 2: Each outgoing feeder is individually racked in, closed, and energized only after its specific energization package is approved and executed. This powers its downstream load (e.g., a transformer or motor).
Considering that all tests related to both incomer and outgoing feeders are already completed, is this phased approach to energization technically acceptable and safe?

Phase 1: Only the incomer breaker is closed. The busbar is energized (highlighted in red), while all outgoing feeders are isolated (open and racked out, shown in gray).
Phase 2: Each outgoing feeder is individually racked in, closed, and energized only after its specific energization package is approved and executed. This powers its downstream load (e.g., a transformer or motor).
Considering that all tests related to both incomer and outgoing feeders are already completed, is this phased approach to energization technically acceptable and safe?
