Vertiv EXM 0080kTK16FN01000, Руководство пользователя

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Chapter 1 Overview 3
Liebert EXM 80kVA ~ 200kVA UPS User Manual
Mains recovery
When the mains resumes normal within allowable time, the rectifier will start automatically and supply the
load and charge the battery again. Therefore, the power supply to the load will not be interrupted.
Battery disconnection
To disconnect the external battery from the UPS system for maintenance, use the external isolating
switch. At this time, except for the battery backup function upon mains failure, other functions and all the
steady state performance of the UPS will not be affected.
UPS module failure
In case of inverter failure and output fuse blowout, the load will automatically transfer to the bypass, and
the output power supply will not be interrupted. In this situation, please contact the local customer service
center of Vertiv Tech Co., Ltd for technical support.
(Parallel System) In the event of a fault in a UPS module, it will automatically exit from the parallel system.
If the system is still capable of providing the required load, the remaining modules will continue to supply
the load with no interruption. If the remaining modules are no longer capable of fulfilling the power
requirements, the load will automatically transfer to the bypass.
Overload
If the inverter is overloaded or the inverter current remains outside the specifications (refer to Table 11-6)
longer than the specified time, the load will automatically transfer to the bypass without power
interruption. If both the overload and the current are reduced to a level within the specified range, then
the load will be transferred back to the inverter. In case of output short circuit, the load will be transferred
to the bypass, and the inverter will shut down. Five minutes later, the inverter will start up automatically. If
the short circuit is removed at this point, the load will be transferred back to the inverter. The transfer is
determined first of all by the features of the protective device of the system.
In the above two situations, the UPS operator control and display panel will display alarm messages.
(Parallel System) The control logic system constantly monitors load requirements and controls the power
supplied by each UPS module. In the event that an overload condition is sustained for greater than a
preset time, the load will transfer to the bypass, when the number of active modules is unable to satisfy
load requirements. The load returns to the inverter if the power is reduced to a value that can be
sustained by the number of active modules in the system.
Maintenance bypass
The UPS has a second bypass circuit, i.e. maintenance bypass, which provides a safe working environment
for the engineers to provide regular maintenance or repair to the UPS system and at the same time
provide unregulated mains supply to the loads. The maintenance bypass can be manually selected
through the maintenance bypass switch, and it can be disconnected by turning the switch to OFF.
Warning
If the UPS system is composed of two or more UPS modules, and when the load capacity exceeds the single
module capacity, do not use the internal maintenance bypass switch.
1.2.4 UPS Power Supply Switch Configuration
The UPS has four switches: rectifier input switch Q1, bypass input switch Q2, maintenance bypass switch
Q3, and output switch Q5. Note that switches Q1, Q2, and Q5 are optional.