Core Balance Current Transformer for Earth Leakage Protection
A Core Balance Current Transformer (CBCT) is a specialized device used to detect earth leakage and residual currents in electrical systems. CBCTs are designed to work with Earth Leakage Relays (ELRs), providing fast and reliable protection against electric shocks, insulation failures, and fire hazards in industrial and commercial installations. Unlike standard current transformers, core balance current transformers enclose all live conductors within a single magnetic core to detect any current imbalance caused by leakage to earth. When such an imbalance occurs, the CBCT sends a signal to the ELR, which can quickly trip a breaker or contactor to prevent accidents.
These transformers are essential in power distribution panels, industrial control panels, motor control centers, and electrical enclosures, where high sensitivity and accurate earth fault detection are critical. Our range of CBCTs comes in multiple aperture sizes, including 20mm, 30mm, 40mm, 60mm, 80mm, and rectangular designs, making them suitable for diverse cable configurations. Designed for easy installation and reliable operation, these core balance current transformers are compatible with leading ELR systems and meet international safety and quality standards.
Using a Core Balance Current Transformer ensures enhanced personnel safety, equipment protection, and compliance with industrial electrical regulations, making them an indispensable part of any modern industrial electrical system.
