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11.3 External Breakers
The G8000 UPS units are not equipped with circuit breakers. The electrical contractor should provide
the external breakers for AC input, Bypass input, DC input, and AC output. See Figure 11.1 for the
position of the breakers.
Table 11.9 shows the minimum rating for each capacity of G8000 UPS breakers. The Bypass input and
the AC output require 4-pole breakers.
Table 11.9 External Breaker Rating.
Capacity
AC input / Bypass input / AC output
Minimum Breaker Rating
DC input
Minimum Breaker Rating
100kVA 480V - 150A 500VDC – 400A
125kVA 380V - 250A 500VDC – 600A
150kVA 480V - 225A 500VDC – 600A
180kVA 380V - 350A 500VDC – 750A
225kVA 480V - 350A 500VDC – 900A
250kVA 380V - 500A 500VDC – 1100A
300kVA 480V - 450A 500VDC – 1,200A