[b]MEASUREMENT TRANSFORMERS[/b] 1

[aism]

Dear All,
Can any one tell me please the differences between the inductive and capacitive measurement transformers.
Wich is much better for use Inductive or Capacitive measurement transformers?

Best Regards.

 

[wbd]

I believe what you are calling an inductive measurement transformer is a common transformer that steps the voltage down to a useable level, such as 120 V. It is commonly refered to as a Potential Transformer and will have a metering accuracy associated with it.
What you refer to as capacitive transformer is a coupling capacitor. It is a series of capacitors with a tap at a location where the voltage is graded down to a useable level. These are typically used on high voltage systems, especially power line carrier signals.

 

[scottf]

Check out these links.

Your refering to VTs (wound-type voltage transformers) and CCVTs (coupling capacitor voltage transformers).

http://www.ritzusa.com/Adobe/VT vs CVT Comparison.PDF

http://www.ritzusa.com/Adobe/OTEF 36.5 to 245kV.pdf

http://www.ritzusa.com/Adobe/OTEF-362 to 550kV.pdf

http://www.ritzusa.com/Adobe/CCVTGeneral.PDF