W A RN IN G!
1. The earth cables and neutral line m ust be connected in accordance w ith local and n ational
codes of practice.
2. Failure to observe could result in electric shock or fire risk .
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 connect the input neutral line to
the neutral terminal N in the cabinet. Ensure correct phase rotation.
2. Split bypass configuration
Remove the shorting copper bar of common input configuration, see Figure 4.2 on page40. 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. Connect the rectifier input neutral line and bypass neutral line to the neutral terminal N in the
cabinet. 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. Refer to Table 4.1
on page36 for the torque value. Ensure correct phase rotation.
W A RN IN G! If there is no requirem ent of power supply for the load b efore arrival of the service
engineer, ensure that the system output cables are safely isolated at their ends.
Connection of batteries
Ensure correct polarity of the connections from the battery string terminals to the BCB and from the BCB to the battery input
terminals (BAT+, BAT-) in the UPS cabinet, that is, (BAT+) to (+) and (BAT-) to (-), but disconnect one or more battery cell
links in each tier. Do not reconnect these links and do not close the BCB before authorized to do so by the service engineer.
N O T E: W hen connecting the cables betw een battery term inals and BCB, the connection should begin
from the BCB term inal.
Now the connection is finished.
N O T E: A fter connection, take appropriate m easures to seal the cable entry h oles.
4 Electrical Installation
45
Vertiv™ Liebert® EXM2 UPS User Manual
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