Control And Operation Devices; Isolators (Dc Input And Ac Output); Emergency Power Off Button (Epo) - AEG UPS 10 kVA User Manual

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3.4

CONTROL AND OPERATION DEVICES

The control and operation devices of the UPS are indicated below:
AC isolator on rectifier input (RCB)
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AC isolator on bypass line input (SBCB)
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Isolator on UPS output (OCB)
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Manual bypass isolator (MBCB)
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Battery Isolator / Circuit breaker (BCB)
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Emergency power off button (EPO)

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Normal/Bypass selector
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LCD control panel
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CHECK THE PERSONNEL TRAINING
The use of the operation and control devices of the UPS is intended for
authorized personnel only. We recommend checking the training of the
personnel responsible for the use and maintenance of the system.
3.4.1

ISOLATORS (DC INPUT AND AC OUTPUT)

The isolators provided on the UPS are used to isolate the power
components of the device from the AC supply line, from the storage
battery and from the loads.
VOLTAGE PRESENT ON TERMINALS
The isolators do not isolate the UPS completely, where the AC line and
battery voltages are still present on the terminals. Before carrying out
any maintenance on the unit:
Isolate the device completely by operating the external
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circuit breakers;
Wait at least 5 minutes in order to allow the capacitors to discharge.
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3.4.2 EMERGENCY POWER OFF BUTTON (EPO)
The emergency power off command is used to disconnect the UPS
output immediately, interrupting the load supply. It also shuts down the
inverter.
OPERATE THE COMMAND ONLY IN CASE OF REAL EMERGENCY
The components of the system are subject to a high stress when the
emergency power off command is pressed under load presence.
Use the emergency power off button only in case of real emergency.
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OMD94016 REV. C