Hi,
At work I had a transformer, primary was 110V, secondary was 18-0-18.
I had information that the 0v on the secondary maybe should be connected to mains earth. But others said it didn't need to be, so I didn't as it didn't seem right to connect a secondary winding to earth...
The problem is, when I powered up, the secondary windings melted, the insulation burnt off and destroyed the transformer. This was only on for 30 seconds.
No components on the motor driver it was connected to got hot and after testing there was not short circuit anywhere on the input, so excessive current should not have happened.
My question is, did I destroy the transformer by not connecting the 0V to earth, or could the transformer have been faulty anyway?
If it depends on the device the transformer is connecting to, is there a way of telling if the 0V needs to be connected to earth or not?
At work I had a transformer, primary was 110V, secondary was 18-0-18.
I had information that the 0v on the secondary maybe should be connected to mains earth. But others said it didn't need to be, so I didn't as it didn't seem right to connect a secondary winding to earth...
The problem is, when I powered up, the secondary windings melted, the insulation burnt off and destroyed the transformer. This was only on for 30 seconds.
No components on the motor driver it was connected to got hot and after testing there was not short circuit anywhere on the input, so excessive current should not have happened.
My question is, did I destroy the transformer by not connecting the 0V to earth, or could the transformer have been faulty anyway?
If it depends on the device the transformer is connecting to, is there a way of telling if the 0V needs to be connected to earth or not?