Apc GALAXY 7000 Bedienungsanleitung PDF herunterladen (Seite 20)

Prerequisites >

34020846EN/AD - Page 20

1. Installation

Recommended maximum downstream protection

Battery protection

Pn = rated power at a power factor of 0.9, for other values please consult the after-sales support or the local office.

See the necessary precautions during connection of circuit breakers / switch-disconnectors in the installation

manual of the battery circuit-breaker enclosure, doc. no. 34021529.

Recommended residual-current protection

If these recommendations are not followed, a short-circuit on an output circuit can result in a break in power longer than 20

milliseconds on all the other output circuits.

UPS cabinets in kVA CB / switch-

disconnector

Trip unit

250 NS 100N

C120N

TM D 80

C 80A

B 125A

300 NS 100N

C120N

TM D 80

C 80A

B 125A

400 NS 100N

NG 125N

C 125H

TM D 100

C 125A

500 C125N

NS 160N

NG 125N

D 125A

TM 160D

D 125

Depending on the installation, the CB/SD may be replaced by a CB/SD with a higher breaking capacity.

These protective devices ensure discrimination for each circuit downstream of the UPS, with or without a bypass AC input.

UPS cabinets in kVA Battery backup time at

Battery CB/switch-disconnector QF1

Type Trip unit magnetic setting in A

250 All NS630 DC MP1 1200

300 ≤ 15 min.

> 15 min.

NS630 DC

C1251N DC

MP1

P21

1200

1600

400 ≤ 5 min.

> 5 min.

NS630 DC

C1251N DC

MP1

P21

1200

1600

500 All C1251N DC P21 1600

Requirements for residual-current protection.

For common normal and bypass AC inputs

- The same residual-current protection may be used for the two lines.

For separate normal and bypass AC inputs

- A transformer is required upstream of either the normal AC line or the bypass AC line.

- Equip each line with a circuit breaker or switch-disconnector with residual current protection.

See “System earthing arrangements”, page 24.

The recommended minimum residual current protection is 3A, provided the conditions defined in IEC364.4-41 are

respected.

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