Modifications reserved Page 62/86
OPM_SGS_USM_M40_M50_1US_V020.doc Operating Manual SG Series 400 & 500 kVA
3. Disconnect the Battery from all Units (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
First operated unit All other units of the system
4. Disconnect the Utility supply from all Units.
• All LED’s are OFF.
First operated unit All other units of the system
END OF PROCEDURE
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