Chapter 2 - Installation Procedure Liebert Hipulse E Installation Manual
Installation (Electrical) Single or '1+N' UPS System
Page 2-6 (07/04)
2.1.8 12-phase wiring procedure (for 300 kVA UPS)
Important
The operations described in this section must be performed by authorised electricians or qualified technical
personnel. If you have any difficulties do not hesitate to contact our Customer Service & Support department at
the address given at the beginning of this manual.
12 Pulse UPS
Once the equipment is in position, and before it is anchored in place permanently
, make the electrical power and
auxiliary connections and mechanically join the two cabinets of the (12 pulse) UPS.
Refer to the drawings provided in Chapter 6 for guidance during connection.
Power connections
1. Connect the wires provided (+\-) from the UPS rectifier bridge to the connection bar of the second rectifier
bridge (optional 12 pulse cabinet). The wire numbered 215 (+) must be connected to the positive bar, while the
wire numbered 214 (-) must be connected to the negative bar. Perform the connection in the order specified.
2. Connect the wires provided (205\206\207) from transformer T2 (in the optional 12 pulse cabinet) to the L1 -
A’\B’\C’ inductor connection bar on the UPS. The wire numbered 205 must be connected to the terminal
marked A’, wire 206 to B’, and wire 207 to C’. Perform the connection in the order specified.
Auxiliary connections
3. Insert the flat cable (W13) provided in the optional 12 pulse cabinet to the fixed connector (X4) on the Rectifier
Logic card (code 4520074A) in the UPS cabinet. Follow connection directions precisely.
4. Insert the loose connectors provided in the UPS cabinet to the fixed connectors in the optional 12 pulse cabinet.
The loose connector (X25) must be inserted in the fixed 6-way connector; repeat the same operation for the
loose connector (X24) on the fixed 4-way connector.
5. The two units must be positioned side by side and bolted together using the holes on the uprights at the sides of
the cabinet.
6. Proceed to make input connections as described in the previous section.
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