Modifications reserved Page 65/86
OPM_SGS_USM_M40_M50_1US_V020.doc Operating Manual SG Series 400 & 500 kVA
7.3.8 Restore to normal operation after EPO (Emergency Power Off)
UPS panel after activation of EPO
(Emergency Power Off) with Utility not
available, i.e. complete shutdown of the
UPS and LCD screen OFF.
In this case wait until Utility is again
available, then proceed to restart the UPS
as described below Points 1 through 3.
UPS panel after activation of EPO (Emergency Power Off) with Utility available.
• All Contacts are open. Rectifier, Inverter and Static-Switch shutdown.
The Battery remains connected to the UPS in case of configuration without external
Battery Breaker Release!
First operated unit All other units of the system
1. Reset the EPO (Emergency Power Off) button.
• Press mute, to reset alarm and buzzer.
First operated unit All other units of the system
2. Press “inverter off” ( O ) key on all Units.
• Rectifiers start with blinking LED.
• After pressing the “inverter off” key on the last unit of the parallel system, the output
of all Units connect to Bypass Utility.
• The LCD screen shows: “LOAD ON BYPASS”.
First operated unit All other units of the system
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