International

Electrotechnical

Commission

Area: 321: Instrument transformers Index language:

Section 321-01: General and common terms
	321-01-01	instrument transformer
	321-01-02	instrument autotransformer
	321-01-03	combined transformer
	321-01-04	primary winding (of a current transformer)
	321-01-05	primary winding (of a voltage transformer)
	321-01-06	secondary winding (of a current transformer)
	321-01-07	secondary winding (of a voltage trans-former)
	321-01-08	secondary circuit
	321-01-09	primary current (of a current trans-former)
	321-01-10	primary voltage (of a voltage transformer)
	321-01-11	rated primary current (of a current transformer)
	321-01-12	rated primary voltage (of a voltage transformer)
	321-01-13	secondary current (of a current transformer)
	321-01-14	secondary voltage (of a voltage transformer)
	321-01-15	rated secondary current (of a current transformer)
	321-01-16	rated secondary voltage (of a voltage transformer)
	321-01-17	actual transformation ratio of a current transformer
	321-01-18	actual transformation ratio of a voltage transformer
	321-01-19	rated transformation ratio of a current transformer
	321-01-20	rated transformation ratio of a voltage transformer
	321-01-21	current error
	321-01-22	voltage error
	321-01-23	phase displacement
	321-01-24	accuracy class
	321-01-25	burden (of an instrument transformer)
	321-01-26	rated burden
	321-01-27	rated output (of an instrument transformer)
Section 321-02: Current transformers
	321-02-01	current transformer
	321-02-02	bushing type current transformer
	321-02-03	bus type current transformer
	321-02-04	cable type current transformer
	321-02-05	split core type current transformer
	321-02-06	bar primary type current transformer
	321-02-07	bar primary bushing type current transformer
	321-02-08	support type current transformer
	321-02-09	wound primary type current transformer
	321-02-10	fully insulated current transformer
	321-02-11	extended rating type current transformer
	321-02-12	single-core type current transformer
	321-02-13	multi-core type current transformer
	321-02-14	compound-wound current transformer
	321-02-15	auto-compound current transformer
	321-02-16	summation current transformer
	321-02-17	current matching transformer
	321-02-18	measuring current transformer
	321-02-19	protective current transformer
	321-02-20	residual current
	321-02-21	residual current transformer
	321-02-22	rated short time thermal current
	321-02-23	extended rating current
	321-02-24	rated dynamic current
	321-02-25	rated continuous thermal current
	321-02-26	composite error
	321-02-27	rated instrument limit primary current (IPL)
	321-02-28	instrument security factor (FS)
	321-02-29	rated accuracy limit primary current (of a protective current transformer)
	321-02-30	accuracy limit factor (of a protective current transformer)
	321-02-31	secondary limiting e.m.f.
	321-02-32	exciting current
	321-02-33	internal burden (of a current transformer)
	321-02-34	knee point voltage
	321-02-35	turns correction
Section 321-03: Voltage transformers
	321-03-01	voltage transformer
	321-03-02	unearthed voltage transformer
	321-03-03	earthed voltage transformer
	321-03-04	measuring voltage transformer
	321-03-05	protective voltage transformer
	321-03-06	dual purpose voltage transformer
	321-03-07	cascade (inductive) voltage transformer
	321-03-08	voltage matching transformer
	321-03-09	residual voltage
	321-03-10	residual voltage transformer
	321-03-11	residual voltage winding
	321-03-12	rated voltage factor
	321-03-13	secondary limiting thermal current
	321-03-14	capacitor voltage transformer
	321-03-15	capacitor voltage divider
	321-03-16	high-voltage terminal
	321-03-17	low-voltage terminal (of a capacitor voltage transformer)
	321-03-18	intermediate-voltage terminal (of a capacitor voltage transformer)
	321-03-19	high-voltage capacitor (of a capacitor voltage transformer)
	321-03-20	intermediate-voltage capacitor (of a capacitor voltage transformer)
	321-03-21	electromagnetic unit (of a capacitor voltage transformer)
	321-03-22	open-circuit intermediate voltage
	321-03-23	voltage ratio of a capacitor divider
	321-03-24	protective device (of a capacitor voltage transformer)