Emerson 480V ユーザーズマニュアル

Electrical Connections

2.1.4 Cable Connections

The rectifier input, bypass and output are easily accessible from the front of the unit for installation.

All require lug type terminations. They are connected to busbars on the front side of the Liebert NX

and below the circuit breaker, as shown in Figure 4. These busbars are accessible when the front

side panel is removed. Busbars to connect external batteries are accessible from the front of the UPS.

Figure 4

Input and output busbars

NOTE
External connection access requires removal of a protective panel on the lower front of the UPS.

NOTE

There is no battery fuse in the UPS; the battery cabinet must include a circuit breaker

to cut off the current in case of short circuit. Refer to Table 8 for current ratings.

Rectifier Input

Busbars

(Phases are

indicated by

letters below the

bars)

Output Busbars

(Phases are

indicated by

letters below the

bars)

Battery Input

Connections

Bypass Input Busbars

(Phases are indicated by

letters below the bars)

Ground

Busbar

Rectifier Input

Busbars

(Phases are

indicated by

letters below the

bars)

Output Busbars

(Phases are

indicated by

letters below the

bars)

Battery Input

Connections

Bypass Input Busbars

(Phases are indicated by

letters below the bars)

Ground

Busbar

Liebert NX 40-120kVA Connections

Liebert NX 160-200kVA Connections