American Power Conversion 208/220 installation manual Minimum breaker settings for 15 kVA UPS

Site Preparation – Operating Environment

Minimum breaker settings for 15 kVA UPS

Overload Event	Mains input	Bypass input	Output	Duration	Notes
Internal fault	2.5 kA	2.1 kA	14 kA	<10 ms	1
800% overload bypass	–	333 A	333 A	500 ms
operation
150% overload normal/	–	–	63 A	30 s
battery operation
125% overload normal/	–	–	52 A	60 s
battery operation
Continuously	51 A	46 A	46 A	∞

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

Minimum breaker settings for 20 kVA UPS

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

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

Minimum setting of breakers for 30 kVA UPS

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

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

14 Smart-UPS® VT 10-30 kVA, 208/220 V Site Preparation and Installation Manual 990-1598B