Chapter 1 Installation Of UPS Module 11
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
3. Connect the protective earth cable and all other necessary earth cables to the earth terminals (PE).
Note
The earth cables and neutral line connection must be in accordance with local and national codes of practice.
4. Identify and make power connections for the input cables according to one of the following two procedures,
depending on the type of installation.
Common input connections
1) In common bypass and rectifier input configuration, for 30kVA ~ 160kVA UPS, connect the AC input cables to the
main input terminals (mA-mB-mC-mN); for 200kVA UPS, connect the AC input cables to the bypass input terminals
(bA-bB-bC-mN). Refer to Table 1-1 for the torque. Ensure correct phase rotation.
Split bypass connections
2) If a split bypass configuration is used, connect the main input cables to the main input terminals (mA-mB-mC-mN),
and connect the bypass input cables to the bypass input terminals (bA-bB-bC-mN). Refer to Table 1-1 for the torque.
Ensure correct phase rotation.
Warning
For split bypass operation, ensure that the linking busbars between the bypass input and maiin input are removed. The main
input and bypass input must be referenced to the same neutral point.
System output connection
5. Connect the system output cables between the UPS output terminals (oA-oB-oC-oN) and the critical load. Refer to
Table 1-1 for the torque. Ensure correct phase rotation.
Warning
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 safetly isolated at their ends.
Warning: hazardous battery terminal voltage 400Vdc
1. Ensure correct polarity of batter string end connections to the UPS terminals, that is, (+) to (+), (–) to (–) and (N) to (N). But do
not make these connections before authorized by the commissioning engineer.
2. Ensure correct polarity of battery string end connections to the battery circuit breaker (BCB) and from the BCB to the UPS
terminals, that is, (+) to (+) and (–) 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 by the commissioning engineer.
6. For frequency converter applications ensure the bypass links are removed.
7. Replace the protective cover.
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