APC 3000 Minimum setting of breakers for 20kVA UPS, Minimum setting of breakers for 30kVA UPS

Site Preparation (UPS and XR) – Operating Environment

Minimum setting of breakers for 20kVA UPS

Overload	Mains input	Bypass input	Output	Duration	Notes
Event
Internal fault	4 kA	3.4kA	14 kA	<10ms	1
800%	–	444A	444A	500ms
overload
bypass
operation
150%	–	–	84A	30s
overload
normal/battery
operation
125%	–	–	70A	60s
overload
normal/battery
operation
Continuously	68A	62A	62A	∞

Note 1: For the output value, the short-circuit-level is indicated.

Minimum setting of breakers for 30kVA UPS

Overload	Mains input	Bypass input	Output	Duration	Notes
Event
Internal fault	5 kA	4.2 kA	14 kA	<10 ms	1
800%	–	667A	667A	500ms
overload
bypass
operation
150%	–	–	125A	30s
overload
normal/battery
operation
125%	–	–	105A	60s
overload
normal/battery
operation
Continuously	102A	92A	92A	∞

Note 1: For the output value, the short-circuit level is indicated.

AIS® 3000 10-30kVA, 208V, Site Preparation and Installation Manual – 990-1957 21