Vertiv Liebert EXL - Maintenance Bypass Operation; Placement into Service Procedures; Forming of Capacitors

Liebert EXL S1 Normal and safe operation
User Manual 10H52226UM60 - Rev. 1 - 01/2017
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5.5.3. Bypass operation
In this operating mode, the connected loads are supplied from line power via the Static Bypass Switch.
The Static Bypass Switch is used to provide power to the loads. If an overload or short-circuit on UPS
output occurs, the Static Bypass Switch is automatically activated to provide uninterrupted power to
the loads. The Bypass operating condition is displayed. From this operating mode, the UPS
automatically reverts to on-line operation after the fault is corrected.
Bypass operation can also be specifically selected from the control panel using the push button.
Figure 46 - Power flow in Bypass operation
5.5.4. Maintenance Bypass
In this operating mode, the connected loads are supplied directly from line power. The Display/Control
Panel is disabled.
Maintenance Bypass is used to supply the connected loads during maintenance work on the UPS.
Figure 47 - Power flow during Service Bypass operation