Liebert Hipulse E - Procedure for Switching the UPS on from a Maintenance Power Condition

Chapter 9 - Operating Instructions Liebert Hipulse E User Manual
Procedure Single or '1+N' UPS System
Page 9-8 (07/04)
5. Unfasten the lock, release the internal safety bar and close the maintenance bypass power switch Q3. Open the
Rectifier input power switch Q1, the Output power switch Q4, the bypass power switch Q2 and the Battery circuit
breaker.
The unit will power down but the load will continue to be supplied by the manual Maintenance bypass.
WARNING
WARNING: Wait 5 minutes for the internal d.c. bus bar capacitors to discharge.
WARNING
The following points will be live within the UPS:
• Bypass a.c. input supply terminals and busbars
• Maintenance Bypass power switch
• Static Bypass power Switch
• UPS output terminals and busbars
Input and output terminals remain protected by a metallic cover.
Your load is now powered from the maintenance bypass system and the UPS is completely shut down.
Caution
The load equipment is not protected from normal supply aberrations when operating in the maintenance bypass
mode.
9.5 Procedure for Switching the UPS ON from a Maintenance Power condition.
Follow the procedure for ‘UPS Start-Up: without interrupting power to the load’ referring to the paragraph 9.2,
start from point number 2.