AFDD – Arc Fault Detection Device combined with RCBO
MK Circuit Protection AFDDs provide protection against fires caused by electrical arcing resulting from faulty wiring or poor connections. The AFDD analyses current/voltage characteristics to identify arcing and automatically trip to isolate the circuit. AFDDs detect arcing faults which can be undetected by MCBs and RCDs.
Types of arc fault
Series arc fault, in-line conductor caused by;
- Loose connections
- Damaged cables (broken, crushed, worn cables)
- Rodent damage
Parallel arc fault, between live conductors, L-N and L-E undetected by MCB/RCD resulting from;
- Damaged insulation
- Pierced insulation (power tools, nails etc)
- Rodent damage
- Poor wiring / damaged appliance plugs
