Vertiv | Liebert EXS 80kVA UPS | User Manual
54
UPS Operating Instructions
• If the UPS system is composed of more than two paralleled UPS modules, do not use the internal
maintenance bypass switch.
Q5
: Output switch, which connects the UPS output to the load.
Figure 5-1 UPS Power Switch
5.1.3. Check Before Start-up
1.
Check and confirm that the UPS power distribution mode is correct, the power cables and signal cables are
connected correctly, and there are no short circuits.
2.
Check that the batteries are properly installed, the cables are correctly connected, and that the positive and
negative battery poles are correct.
3. Measure the mains voltage and frequency and verify that they are correct.
4.
The UPS output terminals are energized when the UPS is switched on. If the load has already been
connected to the output terminals, ensure that it is safe to apply power to it.
Important
The UPS can only be switched on by the user when the UPS is fully installed, and the authorized service engineer has
completed the commissioning tests and the external power input switches are shut down.
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