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Definition of "Current Transformer" |
An instrument transformer specifically designed to give an accurate current ratio for measurement and/or control purposes. They are always connected in series with the circuit (like an ammeter) and hence should never be allowed to have their secondary to be on open circuit to avoid saturation cycle One complete set of values through which an alternating voltage or current passes successively. / [CT] A transformer used to measure current in a circuit by placing the primary winding of the transformer in series with the circuit being measured. A current transformer is used to supply information for measuring power flows and the electrical inputs for the operation of protective relays associated with the transmission and distribution circuits or for power transformers. These current transformers have the primary winding connected in series with the conductor carrying the current to be measured or controlled. The secondary winding is thus insulated from the high voltage and can then be connected to low-voltage metering circuits. / Current transformer can be used to supply information for measuring power flows and the electrical inputs for the operation of protective relays associated with the transmission and distribution circuits or for power transformers. / Current Transformer is used for measurement of alternating electric currents. Current transformers, together with voltage transformers,potential transformers, are known as instrument transformers. / A potentiometer measuring instrument is essentially a voltage divider used for measuring electric potential. the component is an implementation of the same principle, hence its name. Potentiometer. |
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