Introduction to Measurement Transformers
Measuring instruments, such as ammeters, voltmeters, kilowatt-hour meters, etc, whether electromechanical or electronic, meet insuperable design problems if faced with the high voltages or high currents commonly used in power systems.
Current transformers are therefore used with the measuring instruments to:
(a) Isolate the instruments from the power circuits,
(b) Standardise the instruments, usually at 5 amps or 1 amp.
The scale of the instrument (according to the CT ratio), then becomes the only non-standard feature of the instrument.
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If you require more information on Measuring class, please refer to our guide -> PDF
To help explain some of the terminology we use for our range of current transformers, we have produced a terminology section for your assistance.