(CT) can the go bad and give fault reading

Discussion in 'General Electronics Chat' started by techone, Aug 24, 2010.

  1. techone

    Thread Starter New Member

    Aug 24, 2010
    Hey guys i am a new member,

    My question is, can a (CT) current transformer, malfunction and cause the reading on a three phase meter to reflex more that what is use by the client?

    The problem i am facing here is that, one of my client lights bill double for three straight months and the power company came by and said that she actually use the current. Then two days after they came back and change the (CT) in there transformer and then the current consumption went back to normal.

    I am confuss need some help here.

    thanks much guys
  2. marshallf3

    Well-Known Member

    Jul 26, 2010
    Yes, like any other coil with windings they can malfunction exactly as you indicate. If some turns get shorted, and the ones inbetween the shorted points burn open, then you end up with a CT that has less turns reading the current. I won't go into detail as to how they work but it would indicate more power being used than actually is.