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Site Preparation (UPS and XR) – Operating Environment
AIS® 3000 10-30kVA, 208V, Site Preparation and Installation Manual – 990-1957 21
Minimum setting of breakers for 20kVA UPS
Note 1: For the output value, the short-circuit-level is indicated.
Minimum setting of breakers for 30kVA UPS
Note 1: For the output value, the short-circuit level is indicated.
Overload
Event
Mains input Bypass input Output Duration Notes
Internal fault 4 kA 3.4kA 14 kA <10ms 1
800%
overload
bypass
operation
– 444A 444A 500ms
150%
overload
normal/battery
operation
– – 84A 30s
125%
overload
normal/battery
operation
– – 70A 60s
Continuously 68A 62A 62A
∞
Overload
Event
Mains input Bypass input Output Duration Notes
Internal fault 5 kA 4.2 kA 14 kA <10 ms 1
800%
overload
bypass
operation
– 667A 667A 500ms
150%
overload
normal/battery
operation
– – 125A 30s
125%
overload
normal/battery
operation
– – 105A 60s
Continuously 102A 92A 92A
∞