GE Industrial Solutions SG Series 225 & 300 Operating Manual - Manual (Page 69)

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OPM_SGS_USM_M22_M30_2US_V010.doc User Manual SG Series 225 & 300 UL S2
7.2.6 Complete Parallel System shutdown
NOTE !
Follow this procedure only in case the UPS Parallel System and the Load must be
completely powered-down.
If eBoost™ option is available, make sure that eBoost™ Operation Mode is disabled
before starting the shutdown procedure.
Initial situation:
The Load is powered by SG Series 225 & 300 Parallel System supplying the Parallel
Bus.
With the UPS Parallel System in normal operation and the Inverters supplying the Load, the UPS Output
Switches Q1 and the External Battery Switch or Fuses are closed (Pos. I) and the Manual Bypass
Switches Q2 (option) are open (Pos. O).
Initial status:
Load supplied from all Inverters of the Parallel System.
1. Press the “Load Off” key on anyone of the Parallel Units.
• Load is disconnected from UPS Parallel System.
• Rectifiers and Inverters are shut down and all output and input Contactors will be opened.
• LED 3 (Rectifier ON), LED 5 (Inverter available) and LED 10 (Load on UPS) are OFF.
• LED Alarm is lit and the LED Operation is Off.
Synoptic Diagram of first unit Synoptic Diagram of other units
2. Open the UPS Output Switch Q1 (Pos. O) on all Units.
• LED 7 (Q1 closed) is Off.
Synoptic Diagram of first unit Synoptic Diagram of other units
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