APC 6000 Mains 2 line protection, Rated inverter output Maximum permissible current KVA

Appendix (to be carried out by qualified personnel only)

Mains 2 line protection

The rating of the mains 2 line upstream protection circuit-breaker must be chosen:

◗to protect the static switch thyristors with respect to maximum permissible currents. Refer to the table opposite for a 400V mains 2 voltage;

◗to ensure discrimination with respect to the UPS output fuses (refer to fuse time-current curves below) and to the downstream protective devices.

rated inverter output	maximum permissible current
(kVA)
250 to 300	10 In for 20 ms
400 to 450	13 In for 20 ms
500 to 600	27 In for 20 ms

UPS 250 to 450kVA

t(s)

104

103

102

101

1

10-1

10-2

10-3

10-4

102103104

Time-current curve 630A fuse

UPS 500kVA

t(s)

104

103

102

101

1

10-1

10-2

10-3

I(A) 10-4

102103104

Time-current curve 800A fuse

UPS 600kVA

t(s)

104

103

102

101

1

10-1

10-2

10-3

10-4	103	104	I(A)
102

I(A)

Time-current curve 1250A fuse

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