1、 Overview
The LDJ-10 series current transformer with contact box is suitable for current and energy measurement and relay protection in AC lines with rated frequency of 50, 60Hz, rated voltage of 10kV and below indoor devices.
The LDJ-10 series current transformers with contact boxes are fully enclosed and maintenance free products formed by epoxy resin casting.
2、 Structure Introduction
The primary and secondary coils of the LDJ-10 series current transformer with contact box are in a chain structure,. The metrological grade iron core is made of ultrafine crystalline alloy, and the protective grade iron core is made of high-quality silicon steel sheets rolled. The secondary wires are evenly wound on the iron core. The primary coil is made of high-quality soft copper strip or glass wire enameled wire.
3、 Scope of application (if you want to order a product, please consult with me to determine if the scope of application exceeds the following)
1. Equipment type: indoor;
2. The altitude of the installation site shall not exceed 1000m;
3. Environmental temperature: -5 to+40 ℃;
4. There is no pollution, corrosive or explosive medium in the atmosphere that seriously affects the insulation performance of transformers.
4、 Technical data of LDJ-10 series current transformer with contact box (if you want to order product technical data beyond the following range, please consult with me to determine)
1. The product complies with IEC and GB1208-97 "Current Transformers";
2. Rated insulation level: 12/42/75kV;
3. Rated frequency: 50, 60Hz;
4. Rated secondary current: 1A, 5A;
5. Load power factor: COS φ=0.8 (lag);
6. The product is allowed to operate for a long time at 120% of the rated current;
7. The rated output and dynamic thermal stability current can be found on the product nameplate.


LDJ-10 series current transformer with contact box