Chapter 2 - Installation Procedure Liebert Hipulse E Installation Manual
Installation (Electrical) Single or '1+N' UPS System
Page 2-8 (07/04)
Common Input Connections
9. For common bypass and rectifier inputs, connect the a.c. input supply cables between the mains distribution
panel and the UPS rectifier input busbars (U1-V1-W1 terminals) and tighten the connections to 45 Nm (M12
Bolt). Additional connecting cables must be used (see note in paragraph 2.1.1) from the rectifier input bars
(U1-V1-W1) to the bypass input bars (U3-V3-W3). The input neutral cable must be connected to the bypass
input bar (N3).
Note: It is important that the connections between the input cables from the external distribution box and the
additional cables (links) are connected to the rectifier input bars (U1-V1-W1).
ENSURE CORRECT PHASE ROTATION.
Split Bypass Connections
10. If a 'split-bypass' configuration is used, connect the a.c. input supply cables to the rectifier input busbars (U1-
V1-W1 terminals) and the a.c. bypass supply cables to the bypass input basbars (U3-V3-W3-N3 terminals)
and tighten the connections to 45 Nm (M12 Bolts).
ENSURE CORRECT PHASE ROTATION.
Output System Connections
11. Connect the system output cables between the UPS output busbars (U2-V2-W2 N2 terminals)
and the critical load and tighten the connections to 45 Nm (M12 Bolt).
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 safely isolated at their ends.
UPS Battery Connections
12. Connect the battery cables between the UPS terminals (+\-) and its associated battery circuit breaker (as
shown in Chapter 6).
Note: When connecting the cables between the battery extremities to the circuit breaker always connect the
circuit breaker end of the cable first.
The auxiliary cables of the battery must be screened and double insulated. Connect screened auxiliary cables
from each battery circuit breaker controller board (P/N 4520079F) to the UPS auxiliary terminal block
(X3) (as shown in Chapter 6) of their metal frame of the battery circuit breaker box (if used), not of UPS.
OBSERVE THE BATTERY CABLE POLARITY.
WARNING
Do not close the Battery circuit breaker before the equipment has been commissioned
Auxiliary Connections
13. Connect the auxiliary cables of any external interface/signals to the respective connections of the output
auxiliary terminal block (X4) (see Chapter 6).
14. Refit the lower metal protective cover.
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