Medium Voltage Cable Accessories

EC Insulator Jiangxi Co., Ltd. is one of the most reliable manufacturers and suppliers of medium voltage cable accessories in China. With abundant experience, we are committed to offering high quality custom service. Please feel free to wholesale premium medium voltage cable accessories made in China here from our factory.

We've been making the parts that join and terminate medium-voltage cables for over fifteen years. Our fittings show up in underground distribution, substations, switchgear rooms, industrial plants, and the bigger solar and wind jobs. An MV termination or joint has one job - carry the rated voltage and stay sealed - and when it fails the whole feeder is down, so nobody treats this as a commodity. The range covers cables from about 6 kV up to 35 kV. We mould the silicone rubber and core rod ourselves instead of buying them in; that's a habit we kept from the insulator side of the business.

Everything we ship is designed and tested to IEC 60502-4, the standard LV/MV accessory makers work to. The stress-control element keeps partial discharge down - and honestly, that's the number that predicts how long the part will last. Outdoor, indoor and GIS terminations get housings matched to where they'll sit, so a unit for a dusty switchroom isn't the same spec as one on a pole. Before anything ships we confirm cable type, size and voltage class against your order; if you want a datasheet, we'll send one.

Exact ratings depend on the model and your cable. Send the cable type, cross-section and system voltage and we will pin down the right unit plus a datasheet.

Fig. 3 MV T-type Separable Connector

These are built for MV cable routes - underground feeders, substations, switchgear rooms, industrial plants, and the larger renewable or commercial sites. Indoor units go into switchgear; outdoor units take weather housings; separable connectors and GIS ends handle ring-main units and SF6 switchgear. Coastal, polluted or high-altitude sites change the answer, so tell us the conditions and we will say whether the standard range holds or you need a custom build.

Fig. 5 MV Cold-shrink Accessory Kit

The part is three layers, each doing one thing. The EPDM or silicone housing keeps moisture and weather out and supplies the insulation. Beneath it, the stress-control layer spreads the field where the cable screen ends - get that right and partial discharge stays low for the life of the accessory. Metal fittings make the connection to the cable and the switchgear. It is not a clever design; it just has to be done carefully, and doing it carefully is easier when you make the materials yourself.

Design and testing follow IEC 60502-4, which lays down the electrical and mechanical tests for LV/MV accessories. Every batch gets factory tests - partial discharge, dielectric withstand, mechanical and sealing checks - and the test report ships with the goods. The exact sequence can vary by model, so we confirm it on the specific unit you order.

 

 

Pick the termination type, the fitting method (heat-shrink, cold-shrink or pre-moulded), the conductor range and the shed profile. Non-standard sizes, special terminations or project fittings get a technical review before we quote - it's cheaper to catch a mismatch now than after you've placed the order.

Cartons or reinforced wooden crates, cushioned so the fittings don't get knocked about in transit. Each consignment ships with a packing list and the factory test report. Lead time depends on quantity and model, and we confirm it in the PI before you pay.

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