Electronetics designs sensing transformers that deliver extremely accurate output while maintaining high isolation, small size and low cost.
Current Sensing Transformers
These transformers sample high current through the primary and deliver an exact replica to the secondary at a lower current. May be high or low frequency, but are frequently in the 10KHz to 1MHz range. Minimum isolation voltage is often required between primary and secondary.
Important specifications: Fundamental operating frequency (i.e. operating frequency of the source); maximum Volt-Seconds on the secondary; ratio between the primary and secondary; required frequency response (a reflection of how accurate the waveform being sampled must be reproduced at the secondary.)
Voltage Sensing Transformers
Like current sensing transformers, voltage sensing transformers sample high voltage through the primary and deliver an exact replica to the secondary at a lower voltage. They are most often used for line frequency applications at 50 Hz and 60 Hz, but the range can be as wide as that of the current sensing transformer. Minimum isolation voltage is often required between primary and secondary.
Important specifications: Fundamental operating frequency (i.e. operating frequency of the source); maximum voltage on the primary; ratio between the primary and secondary; required frequency response (a reflection of how accurate the waveform being sampled must be reproduced at the secondary.)
