TBC Residual Current Operated Circuit Breaker (RCCB)

Operating Principle: The TBC RCCB operates on the principle of residual current detection. It continuously monitors the balance between phase and neutral currents (or all phases in 4-pole models). When an earth leakage fault occurs, the residual current (difference between incoming and outgoing currents) exceeds the preset sensitivity threshold (IΔn), triggering the magnetic mechanism to trip and disconnect the circuit within milliseconds.

Type AC Characteristics: This device is classified as Type AC, designed to detect and respond to sinusoidal alternating residual currents. It provides reliable protection for standard AC loads commonly found in residential, commercial, and light industrial applications.

Electrical Ratings: The RCCB is rated for voltages up to 230V (2-pole) and 400V (4-pole) at 50/60Hz frequency. With a rated insulation voltage of 500V and impulse withstand voltage of 4kV (1.2/50 μs waveform), it offers excellent protection against transient overvoltages. The device has been tested to withstand 2.5kV dielectric strength for 1 minute at 50Hz, ensuring safe operation under normal and abnormal conditions.

Short-Circuit Performance: With both rated conditional short-circuit current (Inc) and rated conditional residual short-circuit current (IΔc) rated at 10kA, the TBC RCCB can safely interrupt high fault currents when used in conjunction with appropriate over-current protective devices (MCBs or fuses) as per IEC/EN 61008-1 requirements.

Installation Requirements: Designed for Installation Category II/III and Pollution Degree 2 environments, the device is suitable for fixed installations at altitudes up to 2000m. It must be installed in enclosures providing at least IP20 protection and mounted on standard 35mm DIN rails. Terminal connections accommodate cables up to 25mm² and busbars up to 10mm², with a recommended tightening torque of 2 N·m.

Compliance & Standards: Fully compliant with IEC/EN 61008-1 international standards for residual current operated circuit breakers without integral over-current protection. CE marked and manufactured under ISO9001 quality management systems.

• Residential Installations: Protection of household circuits, especially in bathrooms, kitchens, outdoor areas, and other locations with increased shock risk
• Commercial Buildings: Office complexes, retail spaces, hotels, and public facilities requiring personnel protection and fire prevention
• Industrial Facilities: Manufacturing plants, warehouses, and workshops where earth leakage protection is mandated by safety regulations
• Healthcare Facilities: Hospitals, clinics, and medical centers requiring sensitive leakage detection for patient and staff safety
• Educational Institutions: Schools, universities, and training centers with high occupancy and diverse electrical loads
• Agricultural Applications: Farm buildings, livestock facilities, and irrigation systems where moisture increases shock hazards
• Outdoor Installations: Garden lighting, pool equipment, and exterior power outlets requiring enhanced earth leakage protection
• Temporary Power Distribution: Construction sites, events, and temporary installations requiring portable safety protection
• Renovation Projects: Upgrading older electrical systems to meet current safety standards and building codes
• Data Centers: Protection of sensitive electronic equipment and personnel in IT infrastructure environments
• Catering & Food Service: Commercial kitchens and food preparation areas with wet conditions and multiple appliances
• Swimming Pools & Spas: Specialized protection for aquatic facilities where water contact increases electrical hazards