ABB ZX2 - Line Side Grounding of Panels in Single Busbar Systems; Line Side Grounding of Panels in Double Busbar Systems

5. OPERATION 69
5.2.1. Line side grounding of panels in single busbar systems
Step 1:
Feeder
energized
Observe the following single line diagrams for
grounding the line side of a feeder panel.
Step 2:
Open
circuit-breaker
Step 3:
Open
disconnect switch
Step 4:
Close
grounding switch
Step 5:
Grounding via
closing the
circuit-breaker
5.2.2. Line side grounding of panels in double busbar systems
Step 1:
Feeder
energized
Observe the following single line diagrams for
grounding the line side of a feeder panel (initial
situation: panel connected to rear busbar exemplary)
Step 2:
Open
circuit-breaker
Step 3:
Open
disconnect switch
Step 4:
Close
grounding switch
Step 5:
Grounding via
closing the
Circuit-breaker
—
Fig. 5.2.1.1:
Line side ground-
ing, single bus
—
Fig. 5.2.2.2:
Line side grounding
double bus
—
Fig. 5.2.1.1
—
Fig. 5.2.2.1