Vertiv™ |
Liebert® EXM™ UPS 20-100kVA, 50/60Hz User Manual
|
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6.11
Parallel Operations—Software Version 1.1
6.11.1
De-Energize a Liebert
®
EXM Parallel System—Software Version 1.1
To shut down a UPS parallel system using V1.1 controller software:
1.
Log in as Operator, Administrator or Service.
2.
Verify that the system and the connected load are prepared for shutdown.
3.
Touch the OPERATE tab
4.
Touch the
Inverter Off
button. A pop-up window states that the system is operating in a multi-module system and asks
whether to control one inverter or the entire system.
5.
Touch
System.
The power module run lights will start flashing yellow while the unit goes through the inverter shutdown sequence. After a
few seconds, the inverter will turn Off, the static bypass will close and the power module run lights will be Off. All UPS units
in the system will go to bypass
6.
Check the parallel switchgear.
NOTICE
Risk of loss of power to the connected load. Can cause equipment damage.
The following procedure will remove power from the critical bus. Before beginning these steps, shut down the connected
load or transfer the connected load to an input power supply not dependent on the Liebert
®
EXM system that is being
de-energized.
a.
If the parallel switchgear is a matching Vertiv
™
cabinet, open the Maintenance Isolation Circuit Breaker (MIB).
b.
Open all Module Output Breakers (MOB).
7.
Open the input breaker for each UPS and the breaker feeding the Maintenance Bypass Breaker (MBB) in the parallel
switch gear.
The system is now de-energized, and its output power supply is Off.
6.11.2
Re-Energize a Liebert
®
EXM Parallel System—Software Version 1.1
To restart a Liebert
®
EXM parallel system from a fully powered-down condition using V1.1 controller software:
1.
Log in as Operator, Administrator or Service.
2.
Close the input breakers for all UPS units
3.
The LCD on each UPS will turn On, the LCD icons will begin flashing green and the rectifier will start.
The bypass and output icons will illuminate green.
The battery LED will illuminate red.
4.
Close the Module Output Breakers (MOB) circuit breaker to each UPS.
5.
Close the MIB circuit breaker.
6.
Touch the OPERATE tab
7.
Touch the
Inverter On
button. A pop-up window states that the system is operating in a multi-module system and asks
whether to start one inverter or the entire system.
8.
Touch
System.
The LCD icons will start flashing green while the unit goes through the inverter startup sequence. After about a minute,
the inverter will turn On, the static bypass will open and the icons will be solid green.
9.
Close all battery breakers.
6.12
Emergency Shutdown With EPO
This circuit has been designed to switch Off the UPS in emergency conditions (e.g., fire, flood, etc.). The system
will turn Off the rectifier, inverter and stop powering the load immediately (including the inverter and bypass),
and the battery stops charging or discharging.
WARNING
Risk of electric shock. Can cause equipment damage, injury and death.
The following procedure will supply power to the critical bus. Before beginning, notify all personnel that
input power is being supplied to the circuits. Verify that the connected load is prepared for input current.
Summary of Contents for Liebert EXM
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