Dry-type Current Transformers

1. Products Explanation:

Model: LGB
The dry-type current transformer, assembling by a bushing-type primary winding and secondary winding(s).Possessing those advantages of light frame, oil-free, gas-free, porcelain-free, fire-proof and explosion-proof etc, used for current measurement and relay protection in the power system with the rated voltage of 35kV.

 

1. Technical Parameters:

   Rated voltage is 35kV up to 220kV
Highest voltage for equipment is 40.5kV up to 252kV
Rated primary current is 50A~4000A
Rated secondary current is 5A or 1A
Rated frequency is 50Hz or 60Hz
Rated output: 20VA~40VA (If any other rated output required, we can satisfy it.)
Accuracy classes and their combinations: Steady accuracy classes are 0.2S, 0.2, 0.5S, 0.5, 5P, 10P, PR and PX; transient accuracy classes are TPS, TPX, TPY and TPZ. There are 1~6 pcs secondary winding(s) in a CT.
Instrument security factor (FS) of measuring class is 5 or 10
Accuracy limit factor (ALF) of protective class is 5, 10, 15, 20, 30 or 40
Arcing distance is ≥410mm
Non-effectively earthed neutral system

1. Main Features:

   The frame of the dry-type current transformer is upstanding, its parts which outside of the case are the bushing-type assemblies which made by silicon rubber umbrellas, and there are the primary terminal blocks at the top of the assemblies; The secondary winding(s) are going through the bushing-type primary winding, which put inside the case, there is a secondary terminals box in the obverse of the case; There are 4 pcs lifting eyebolts at the bottom of the case. The main insulation of the dry-type current transformer is made by the new organic composite materials, comparing to the other current transformers of the same voltage, it has the advantage of oil-free, gas-free, small volume, light and excellent performances.