Current Sense Transformer Clarification

[sabu31]

Dear All,

Are the attached current sense transformers interchangeably used except for max current limit.

Also is there any limit for terminating resistance. Or can we increase it based on the voltage requirement.

Thanking you.

 

[FvM]

The CT have rougly similar data.

Burden resistor is primarily limited by core saturation flux (V*us integral). The values given in the pulse datasheet are related to the specified lower frequency limit and rated current, at higher operation frequencies or lower currents, increased Rt may be feasible.

 

[KlausST]

...
And in the Coilcraft datasheet Rtmax is given in the table.

Klaus

 

[FvM]

And in the Coilcraft datasheet Rtmax is given in the table.

My bad, I meant Rt values in Coilcraft datasheet.

 

[KlausST]

Concluding:
* Pulse datasheet: Rt_max is given via Vt (and one can calculate Rt for different (fundamental) frequencies)
* Coilcraft datasheet: Rt_max is given in the table for f_min .... (and one can simply can multiply it with: f_app/f_min )
... where f_app means the fundamental frequency in your application.
Even low DC will kill performance!

Klaus