Jump to content

Who Is Expereinced?


Recommended Posts

Greeting for everybody,


I've a 50Hz dry type transformer which will be used for lighting. The applicable standard material specification requirement is a minimum of 4% impedance for this particular transformer. But, the actual impedance of the transformer is 3%.


Can any one of you explain to me what is the impact of using this transformer which has an impedance below the minimum requirement?

Link to comment
Share on other sites

Hello Engineer


For a given load, the voltage drop through the transformer will be lower. This is not usually a problem.


The other consideration is that because the impedance is lower, the fault current could be higher.

In most cases, that is not an issue either. The fault current is determined by a combination of the primary side fault current and the transformer impedance.


Best regards,


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...