Outdoor Current Transformer

Outdoor current transformers are critical components in modern power systems, enabling accurate measurement and protection in outdoor switchyards and substations. At ZHNYU ELECTRIC, we combine decades of expertise with advanced manufacturing to produce outdoor current transformers that excel in accuracy, durability, and safety. Our production process begins with rigorous material selection: high-permeability silicon steel cores for low losses, and high-grade epoxy resin or silicone rubber for insulation. These materials are tested for dielectric strength, thermal stability, and UV resistance. The core is precisely wound with copper wire, and the secondary winding is machine-layered to ensure consistent turns ratio and low leakage reactance. Our automated winding machines, part of our 100+ production equipment, achieve tolerance within ±0.5%, far exceeding industry norms. Each transformer undergoes vacuum casting to eliminate voids and partial discharge, followed by curing in controlled chambers.