JLD Combined Instrument Transformer

Our Features

The combined instrument transformer is used to separate the protection and measurement devices from the high voltage and convert the current and voltage to be measured on the high voltage line into the power equipment with a certain accuracy of current and voltage signals suitable for the protection and measurement devices.

Technical Specs

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Small volume: the volume is basically the same as the current transformer of the same grade;
Good anti ferromagnetic resonance performance: the voltage part adopts a new open T-type iron core to avoid ferromagnetic resonance;
Excellent lightning impulse resistance and system over-voltage performance: the voltage primary coil is divided into multiple sections, which are connected in parallel with the capacitance screen inside the main insulation to increase the longitudinal capacitance of the primary winding and improve the product's ability to withstand lightning impulse over-voltage and system over-voltage;
Low product temperature rise: the primary winding of the product is thin and high compared with the traditional structure, the total heat dissipation area is large, the product temperature rise is low, and the product performance is reliable;
The product occupies a small area, reducing the investment in substations;