Liebert EXL S1 Installation
User Manual 10H52226UM60 - Rev. 1 - 01/2017
47
3.7. Power connections
The power connections (see Fig. 24-Fig. 37) on the front of the UPS are:
• U, V, W - LINE POWER INPUT
• U1, V1, W1 - LINE POWER BYPASS (only at the standard UPS type)
• N - NEUTRAL BAR (PEN/N) (COMMON TEST POINT FOR PRIMARY INPUT NEUTRAL, BYPASS
INPUT NEUTRAL AND OUTPUT NEUTRAL)
• U2, V2, W2 - UPS OUTPUT TO LOAD
• D-, C+ - BATTERY TERMINALS
• GROUND CONNECTION (PE)
The 600/800/1000/1200kVA ratings are supplied without the maintenance bypass switch
(corresponding to QS3 on other ratings). It is recommended that the Customer provide an external
Bypass switch, ensuring that it is correctly rated (see Table 1 on page 38, chap. 9. on page 102).
Auxiliary signal contacts shall be assigned to a programmable input of XP11 (see Fig. 41), so that the
status of the switch can be monitored during the normal operation.
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