Connection of system input
1. Common input configuration
Connect the AC input cables to the bypass input terminals (bA-bB-bC) in the cabinet and tighten the
connection. Connect the input neutral line to the neutral terminal N in the cabinet and tighten the connection.
Ensure correct phase rotation.
NOTE: Ensure that the shorting copper bars between the rectifier input terminals and the bypass input terminals are
connected respectively.
2. Split bypass configuration (default)
Remove the shorting copper bars. Connect the rectifier input cables to the rectifier input terminals (mA-mB-mC)
in the cabinet and connect the bypass input cables to the bypass input terminals (bA- bB-bC) in the cabinet and
tighten the connection. Connect the rectifier input neutral line and bypass neutral line to the neutral terminal N in
the cabinet and tighten the connection. Ensure correct phase rotation.
Connection of system output
Connect the system output cables between the output terminals (oA-oB-oC-N) in the cabinet and the load and
tighten the connection. See Table 4.1 on page34 for the torque value. Ensure correct phase rotation.
WARNING! Risk of electric shock and arc flash. Can cause equipment damage, property damage, personnel
injury or death. Make sure that the system output cables are safely isolated at their end if a power supply is
not required for the load equipment before arrival of the service engineer.
Connection of batteries
1. If the built-in battery module is selected, there is no need to connect the battery cable. If the purchased battery is
an external battery cabinet, the battery cable needs to be connected to the UPS separately. The specific wiring
method and copper bar location are shown in Figure 4.4 on the facing page.
2. Ensure correct polarity of the connections from the battery string terminals to the battery switch box and from
the battery switch box to the battery input terminals (BAT+, BAT-) in the UPS cabinet, that is, (BAT+) to (+) and
(BAT-) to (-), (N) to (N). Do not reconnect these links and do not close the battery switch box before authorized
to do so by the service engineer.
40 Proprietary and Confidential ©2023 Vertiv Group Corp. 4 Electrical Installation
Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual
To Next Page
Loading...
