ABB RCCB/ELCB 25A 4P 100MA 25A/0.1/4P BMFW425/AC100 1SYF604062R2250 FORMULA

• A residual current circuit-breaker is an amperometric protection device which trips when there is a leakage of current to earth.
  • RCCB is the safety device to detect earth leakage current and trip the circuit
    • Sensitive only to earth fault current, therefore they have to be connected in series with a MCB or a fuse to protect them against over-currents and short-circuits