Modifications reserved Page 49/86
OPM_SGS_USM_M40_M50_1US_V020.doc Operating Manual SG Series 400 & 500 kVA
7.2.2 Complete UPS shutdown (No Load supply)
NOTE !
The Load must be disconnected.
Initial status:
Load supplied from Inverter.
1. Press “total off” button.
• Load is disconnected from UPS.
• Rectifier is shut down and all output and
input contactors will be opened.
• LED’s, Rectifier, Inverter and Load are OFF.
• Press mute, to reset alarm and buzzer.
The Battery remains connected to the UPS in case of configuration without external
Battery Breaker Release!
2. Open Q1 (Pos. O).
• LED service check lights up.
4. Disconnect the Battery from the UPS (only for UPS configuration without external
Battery Breaker Release).
• Wait 5 minutes for DC-Link Capacitors to discharge.
Before you proceed with any kind of
intervention on the UPS, make sure the
DC-Link voltage be less than 15 VDC.
Ub=15V
Ib= + 0A
Battery Temp= + 20
°
C
Charge Level= 87%
Autonomy = 12min
metering
alarms
parameters
+
–
ok
4. Disconnect the Utility.
• All LED’s are OFF.
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