SECTION 321-01 - GENERAL AND COMMON TERM
321-01-19
rated transformation ratio of a current transformer
The ratio of the rated primary current to the rated secondary current of a current transformer.
SECTION 321-02 - CURRENT TRANSFOMRERS
321-02-18
measuring current transformer
A current transformer intended to transmit an information signal to measuring instruments and meters.
SECTION 321-02 - CURRENT TRANSFOMRERS
321-02-19
protective current transformer
A current transformer intended to transmit an information signal to protective and control devices.
NOTE - The accuracy clas of a protective transformer is designated by its class index followef by the letter P (standing for "Protection").
SECTION 321-02 - CURRENT TRANSFOMRERS
321-02-28
instrument security factor (FS)
The ratio of rated instrument limit primary current to the rated primary current.
SECTION 321-02 - CURRENT TRANSFOMRERS
321-02-30
accuracy limit factor (ALF)
(of a protective current transformer)
The ratio of the rated accuracy limit primary current to the rated primary current.
SECTION 321-03 - VOLTAGE TRANSFOMRERS
321-03-04
measuring voltage transformer
A voltage transformer intended to transmit an information signal to measuring instruments and meters.
SECTION 321-03 - VOLTAGE TRANSFOMRERS
321-03-05
protective voltage transformer
A voltage transformer intended to transmit an information signal to protective and control devices.
NOTE - The accuracy clas of a protective transformer is designated by its class index followef by the letter P (standing for "Protection").