[SOLVED] SMPS transformer testing

[anand003]

Dear Folks,

I want to test smps transformer (230v to 20v). Can I test it by giving 230v AC directly to the primary???.. (In fact I have tested it connecting to 230v AC but the MCB trips when it is tested, is it possible to test a SMPS transformer to connect directly to the AC ??) . Is the SMPS transformer is like normal step down transformer.. ???

As I am not a hardware expert please advice..

 

[FvM]

is it possible to test a SMPS transformer to connect directly to the AC

No, as already found out by trial.

Is the SMPS transformer is like normal step down transformer

It's a step down transformer operating at several 10 kHz. Your question suggests, that you don't have the means to test it, possibly except for measuring winding resistances and isolation.

 

[liteon]

The smps transformer is not normal step down transformer. Generally they operate at higher frequencies.The frequency of AC power is 50Hz/60HZ. Thats why in SMPS the AC power is first synchronized and converter to DC voltage and fed to the transformer along with some driver chip.
Putting a Pure SMPS transformer directly to AC power source may fry it almost immediately.