Liebert Ship-Ahead Input/Output Cabinet NXL - Manual (Page 10)

Electrical Installation
6
Top Cable Entry
When making the power connections, the recommended order of pulling and installing cables
is to start from the top connections to the bottom connections. The cables must be routed
around the fault braces (see Detail in Figure 3). This is to prevent the cables from contacting
other busbars. The recommended conduit layout is shown in Figure 1.
Bottom Cable Entry
When making the power connections, the recommended order of pulling and installing cables
is to start from the bottom connections to the top connections. The cables must be routed
around the fault braces (see Detail in Figure 3. This is to prevent the cables from contacting
other busbars. The recommended conduit layout is shown in Figure 1.
5. Close and secure the interior and exterior doors.
NOTE
For a Single Input configuration, linking busbars must be installed between the bypass and
the rectifier input.
!
WARNING
Risk of electrical shock. Can cause injury or death.
If the load equipment will not be ready to accept power on the arrival of the commissioning
engineer, ensure that the system output cables are safely isolated at their termination.
!
WARNING
Risk of electrical shock. Can cause injury or death.
When connecting the cables between the battery extremities to the circuit breaker always
connect the circuit breaker end of the cable first.
NOTE
If fault bracing brackets were removed during installation, they MUST be replaced.
Table 1 Current ratings—rectifier input
UPS Rating Voltage, VAC
Nominal
Current
Maximum
Current
External
100% Breaker
Trip, Amps
External
80% Breaker
Trip, Amps kVA kW Input Bypass Output
250 225 480 480 480 313 392 400 500
300 270 480 480 480 376 469 500 600
400 360 480 480 480 500 625 700 800
Table 2 Current ratings—bypass input
UPS Rating Voltage, VAC
Nominal
Current
10 Minute
Overload
External Breaker
Trip, Amps kVA kW Input Bypass Output
250 225 480 480 480 301 376 400
300 270 480 480 480 361 451 500
400 360 480 480 480 481 601 700
Table 3 Current ratings—output
UPS Rating Voltage, VAC
Nominal
Current
10 Minute
Overload
External Breaker
Trip, Amps kVA kW Input Bypass Output
250 225 480 480 480 301 376 400
300 270 480 480 480 361 451 500
400 360 480 480 480 481 601 700