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Network energy UPS5000-A mains three-phase current is imbalance

Publication Date:  2017-09-01 Views:  680 Downloads:  0
Issue Description

After communicate with FSE, the problem are Alarm ID 0358-001(UPS is working in Bypass mode) and Alarm ID 0193-001(mains three-phase current is imbalance) on UPS LCD.

 


Alarm Information

Handling Process

1.      For Alarm 0358-001, The UPS is working in Bypass mode from 2017.06.11.If the AC input is outage, the load will be shut down.

  Ø  Start the inverter. Let UPS transfer to invertor mode.  When AC input is outage, the UPS will transfer to battery mode automatically. 

2.     For Alarm 0193-001,the mains three-phase current is imbalance.
   

  Ø  The current of Phase A and Phase B are 0 A. Only phase C is 9.7A. The AC output phase current is imbalance. And have confirmed with customer, they didn't connect load on phase A and phase B. So this alarm is normal.

      Ø  When UPS is working in invertor mode, it will not affect UPS working. if customer don't want to see this alarm. We can disable this alarm.


 

     



Root Cause

Customer didn't connect load on phase A and phase B. So load is imbalance in each phase.

Solution

  Ø  Start the inverter. Let UPS transfer to inverter mode.  when AC input is outage, the UPS will transfer to battery mode automatically

  Ø  If customer have many loads, it is better to let each phase loads balance.

  Ø  If customer only has little load. and don’t want to see this alarm. Please Disable the Min. main input cur.exceed option. 

      Step 1. Click system Info

      
      Step 2 Click setting

      
      Step 3 Input user name and password. Default user name: admin. Default password: 000001

     
      Step 4 Click PDU Param.  to set related parameters

      

 
      Step 5 Find Min. main input cur.exceed option, and disable this option.

     

      Note: If the version of UPS5000 is V100R002C41SPC100. We need to set Min. main input cur.exceed to disable this alarm. But if it is V100R002C41SPC300, We need to set Min. input 3-phase cur.imb to disable 

   

END