Jump to content

Unbalance Load


Recommended Posts

Dear sir

pl;s be informed that wehave power transformer the measurment current display on the digital protection relay un balanced ( 380 ,150 ,380 A) but when we accumalted the all loads found the load balanced on the three phases (380 ,380 ,380)

could you advise me what the reason for this strange problem.

looking forward your kind replay as soon as possible

osama

Link to comment
Share on other sites

Dear sir

pl;s be informed that wehave power transformer the measurment current display on the digital protection relay un balanced ( 380 ,150 ,380 A) but when we accumalted the all loads found the load balanced on the three phases (380 ,380 ,380)

could you advise me what the reason for this strange problem.

looking forward your kind replay as soon as possible

osama

 

Hello Osama,

 

My first line of action will be to check the CT.

 

you can cross check the CT by checking the secondary current of CT with clampmeter and then multipliying with the ratio

 

for example....if you read 4 amps on the secondary of CT and your CT ratio is 1000/5 then your primary currnt is 4 X 1000/5= 800 amps.

 

Cheers

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...