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Current Transformer

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Current Transformer Product Details:


Instrument transformers include Current transformer (CT) and voltage transformers (VT) (potential transformers (PT)).

CT is used for measurement of electric currents. When current in a circuit is too high to directly apply to measuring instruments, a current transformer produces a reduced current accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. Current transformer also isolates the measuring instruments from what may be very high voltage in the monitored circuit. It commonly used in metering and protective relays in the electrical power industry.



IEC-60044 Instrument transformers


Supply scope:

Ø  35~500kV oil immersed inverted current transformer

Ø35~500kV SF6 gas insulated inverted current transformers

Ø  35~500kV capacitor voltage transformer

Ø 35~500kV SF6 gas insulated voltage transformers for mounting in GIS

Ø 35~220kV inductive voltage transformers

Ø 10~220kV oil immersed tank type current transformers


Application: metering and protective functions in electrical power industry. 

Typical specification:

ØType: Oil immersed Current transformer

Ø Rated ratio: 220kV

Ø Rated frequency: 50Hz

Ø Creepage distance: 7900mm

Ø Rated primary current:2*600~2*800

Ø Accuracy classes: 0.2; 0.5; 0.2S; 0.5S; 5P; 10P

Ø Rated power frequency withstand voltage (r.m.s):60kV

ØRated lighting impulse withstand voltage(full wave)(peak): 1050kV

ØRated lightning impulse withstand voltage (chopped wave)(peak): 1208kV




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