RCCB

Short for Residual Current Circuit Breaker. A type of RCD.

In both ELCB and RCCB, a test switch is provided to create an artificial fault.

Advantages of RCCB

• No earthing required
  ELCB relies on proper earthing; RCCB doesn’t.
• More reliable
  RCCB avoids relying on earthing systems that can deteriorate over time and uses solid-state circuits.
• Faster
  RCCB has fewer mechanical parts and uses a direct sensing mechanism through core balance transformer.
• More protection
  RCCB protects against both earth leakage faults and electric shock hazards, while ELCB only protects against earth leakage faults.

Ratings

• Rated current
• Rated voltage
• Sensitivity

Note

2 Pole RCCB - used in single-phase supply connection that has only a live and neutral wire.