I would like to be able to test a current sensing relay. (A field application relay for a synchronous motor.)
This relay looks for a drop in inrush current, from over 300 amps to around 150 amps. The CT output falls from 15 to 3 amps, indicating the motor has reached the proper speed. The ratio dosent appear linear but thats how it looks when it works
Would this be as simple as a 120v isolation transformer with a variable resister?
Or should I use an actual CT and somehow get the ratio correct for a more reasonable primary current.
Thanks
This relay looks for a drop in inrush current, from over 300 amps to around 150 amps. The CT output falls from 15 to 3 amps, indicating the motor has reached the proper speed. The ratio dosent appear linear but thats how it looks when it works
Would this be as simple as a 120v isolation transformer with a variable resister?
Or should I use an actual CT and somehow get the ratio correct for a more reasonable primary current.
Thanks
