Circular Residual Current Transformer for Leakage Detection

 Circular Residual Current Transformer (RCT), also known as a residual current transformer, RCD current transformer, or leakage current sensor, is used to detect leakage and imbalance currents in power distribution systems, improving electrical safety and fire protection.

Circular Residual Current Transformer Applications

Circular Residual Current Transformers are widely applied in:

• Power distribution boards and switchgear
• Industrial automation and control panels
• Commercial buildings and residential systems
• Earth leakage and electrical fire protection systems

They are especially effective in detecting low-level leakage faults that traditional overcurrent protection devices cannot identify.

Key Advantages

• High sensitivity to leakage current, enabling early fault detection
• Through-core circular design allows cables or busbars to pass directly through
• Reduced magnetic interference for stable and accurate measurement
• Multiple through-hole sizes and current ratings for flexible system integration

The Circular RCT series from Jiangyin Yucheng Electric supports various configurations for different distribution system requirements.

Installation

Installation is simple and efficient:

• Pass the cable or busbar through the circular core
• Connect the secondary output to a relay, controller, or monitoring device

The compact structure makes it suitable for new installations and retrofit projects.

Circular Residual Current Transformer Maintenance

• Periodic visual inspection and functional checks are sufficient
• Minimal maintenance required during operation
• When integrated with smart meters or monitoring systems, residual current data can support predictive maintenance and energy management

Explore our range of Circular Residual Current Transformers

Contact us to request technical specifications, application support, or customized solutions.