Emerson 480V Benutzerhandbuch

4. Identify and make power connections with incoming cables according to Steps 5 through 10.

5. For common bypass and rectifier inputs, connect the AC input supply cables between the power 

distribution panel and the UPS input busbars (A-B-C terminals) and tighten the connections to 

88 lb-in. (10 N-m) using the M8 bolt provided.

6. Remove the internal links installed between the Input circuit breaker (CB1) busbars and Bypass 

Input busbars as shown in Figure 4.

7. For the bypass, connect the AC input supply cables between the power distribution panel and the 

UPS input busbars (A-B-C terminals) and tighten the connections to 88 lb-in. (10 N-m) using the 

M8 bolt provided.

8. For the Rectifier Input, connect AC input supply cables between the power distribution panel and 

the UPS input circuit breaker (A-B-C terminals).

9. Connect the system output cables between the UPS output busbars (A-B-C terminals) and the 

critical load and tighten the connections to 88 lb-in. (10 N-m) (M8 bolt).

Observe the battery cable polarity. Be sure that the battery connector is made with the cor-

rect polarity.

10. Refit all protective covers removed for cable installation

If a frequency converter configuration is used, connect the AC input supply cables to the rectifier 

input busbars (A-B-C terminals). Torque to 88 lb-in (10N-m) for M8 bolts. Ensure correct phase rota-

tion. There will not be any AC bypass supply cables to the bypass input (A-B-C terminals) and tighten 

the connections.

NOTE
Both the rectifier and bypass feeds MUST come from the same utility source.

If the load equipment will not be ready to accept power on the arrival of the commissioning 

engineer, then ensure that the system output cables are safely isolated.

NOTE
The operations described in this section must be performed by authorized electricians or 

NOTE
For frequency converter operation, ensure that the linking busbars between the bypass and the