The CBCT (Core Balance Current Transformer), developed by Borna Electronics, is a specialized current transformer designed for earth leakage and ground fault detection systems. The device operates based on the vector summation of all conductors passing through its core. Under normal operating conditions, the vector sum of the currents is zero, resulting in no output signal. When an earth leakage fault occurs, the current imbalance generates a proportional output signal that can be detected by an Earth Fault Relay.

The CBCT provides reliable leakage current detection while maintaining complete electrical isolation from the power network, making it suitable for both industrial and commercial protection systems.

Features

• Earth leakage current fault detection
• Electrically isolated from the power network
• Compatible with Borna Electronics Earth Fault Relays
• Can be calibrated for use with third-party earth fault relays
• Available with internal diameters of 4 cm, 8 cm, 14 cm, and 28 cm
• Suitable for three-phase applications
• Suitable for single-phase applications
• DIN rail and panel mounting capability
• Can be installed on incoming, outgoing, or earth conductors
• Dedicated terminal for connection to earth fault relays

Technical Specifications

Applications

• Earth fault protection systems
• Ground leakage monitoring
• Industrial electrical panels
• Power distribution systems
• Motor protection applications
• Integration with earth fault relays

The CBCT Core Balance Current Transformer provides accurate and dependable earth leakage current measurement, enabling fast fault detection and improving electrical system safety and reliability.