Modifications reserved Page 91/103
OPM_LPS_33E_60K_M12_2GB_V010.doc Operating Manual LP 33 Series 60-80-100-120 kVA / S2
8.2.8 Restore to normal operation after “EPO – Emergency Power Off”
NOTE !
Make sure the all units of the Parallel System to be status of the activation of “EPO -
Emergency Power Off”, i. e. Q1 closed, Q2 open and the external battery fuses
connected.
View of the synoptic diagram, on all UPS units, after pressing
the push-button “EPO - Emergency Power Off”:
• All Contactors are open.
• Booster, Inverter and Static-Switch shutdown.
1. Reset the push-button “EPO”.
Press MUTE key to reset Alarm and Acoustical alarm.
LED Alarm remains lit.
2. Reset the UPS by pressing “Inverter OFF” ( O ) key on all UPS units.
The load is supplied by the mains through the automatic bypass.
The booster starts automatically.
The synoptic diagram must display the status “LOAD SUPPLIED BY
AUTOMATIC BYPASS”.
3.
Insert the inverter by pressing “Inverter ON” ( I ) key on first UPS unit.
In case of sufficient output power, the output will transfer to
Inverter.
LED Alarm turn Off and the LED Operation must be is lit.
The Synoptic diagram, on first UPS unit, must display the status
“LOAD SUPPLIED BY INVERTER”.
4.
Insert the inverter by pressing “Inverter ON” ( I ) key on all other UPS units.
Do not start the next inverter until the sequence of the previous one ends.
As soon as the output power of the inverters is sufficient to supply the load, the output of the units with
running inverter will transfer to inverter.
LED Alarm turn Off and the LED Operation must be lit.
The Synoptic diagram, on all UPS units, must display the status
“LOAD SUPPLIED BY INVERTER”.
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