GE 400 User Manual

Also see for 400 Series: Maintenance manual User manual Instruction Instructions Instructions

Contents

GE 400 User Manual Manual pdf 51 page image

Modifications reserved Page 51/79OPM_SGS_USM_M40_M50_2US_V010.doc User Manual SG Series 400 & 500 UL S27.1.3 From Manual Bypass Q2 (option) to normal function VFINOTE !UPS system has been turned OFF following the “Maintenance shutdown (Load onManual Bypass Q2)” procedure and the Load is still powered by Manual Bypass Q2(option).The Load must be transferred back to the UPS system.Open the front door and make sure that:• The safety screens are fixed in their position.• The UPS Output Switch Q1 and the External Battery Switch or Fuses are open (Pos. O).• The Manual Bypass Switch Q2 (option) is closed (Pos. I).• LED Alarm is lit.Initial status:Load supplied from Manual Bypass Q2 (option).1. If not already supplied (separate Utility Inputs), switch-ON the Utility power to the Rectifierinput.2. Close the UPS Output Switch Q1 (Pos. I).• Load is now supplied parallel through Automatic Bypass and Manual Bypass Q2.LED 8 (Automatic Bypass ON) and LED 9 (Manual Bypass Q2 ON) are lit.• Rectifier starts automatically, blinking LED 3 (Rectifier ON) indicates Soft-start.• At the end of Rectifier Soft-start the LED 3 (Rectifier ON) remains lit.The Synoptic Diagram must display the status “LOADSUPPLIED BY AUTOMATIC BYPASS AND MANUAL BYPASSQ2”.3. Connect the Battery to the UPS by closing (Pos. I) the External Battery Switch or Fuses.LED 4b (Charging Battery) should be lit indicating battery charge.ATTENTION !Before performing this operation, the LED 3 (Rectifier ON) must remain lit, thusindicating that the DC-Link has reached floating voltage (540Vdc)!Continue ►