Apc GALAXY 7000 User Manual download pdf (Page 59)

Electrical characteristics >

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2. Appendices

2.3 Electrical characteristics

Selection of protection devices

UPS short-circuit current with inverter coupled and bypass AC source out of tolerances

When sizing the upstream circuit breakers, the parameters presented below must be taken into account.

Time/current curves for UPS input and output fuses

Sn 250 kVA 300 kVA 400 kVA 500 kVA

In (at 400 V) 361 A 433 A 577 A 721 A

Isc 1085 A 1085 A 1446 A 1975 A

Q4S

Q5N

NORMAL AC

BYPASS AC

Upstream

(not supplied)

Downstream

(not supplied)

output

fuses

input

fuses

Upstream

(not supplied)

Load

I (A)

t (s)

400 kVA : 800A

500 kVA : 1000A

250-300 kVA : 630A

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Apc GALAXY 7000 User Manual Page 59