RCD Add on blocks - 125A

125A RCD Add on block is designed to be fitted on right side of 3 & 4 pole HLF MCBs (80-125A).

Advantages of RCD Add on blocks - 125A

The combined unit (HLF MCB + RCD Add on block) ensures, in addition to over-load & short-circuit protection, the protection of installation against insulation faults (300mA,500mA, 1A) and protection of humans against electric shocks due to direct & indirect contacts with live parts (30mA, 100mA).

These RCD AoBs are available in type AC for standard electrical networks and type Hi (High Immunity) for electrically disturbed networks having pulsated DC currents, transients and harmonics.

Adjustable sensitivity and trip time delay version allows better coordination through current and time based
discrimination between upstream and downstream earth leakage protection devices.

Technical details

Conforms to IEC 61009-1:1996, IEC-60947-2:1996
Rating - 125A
No. of poles - 3P & 4P
Sensitivity
  • Fixed - 30mA, 300mA
  • Adjustable - 300mA, 500mA, 1A


Trip time
  • Fixed - instantaneous
  • Adjustable - inst, 60msec, 150msec


Breaking capacity - 10kA (with MCB)


Tripping characteristic
  • Type AC - for standard networks
  • Type Hi - for electrically disturbed networks


Connection
  • Flexible conductors - upto 50 sq mm
  • Solid conductors - upto 70 sq mm

Features & benefits

Choice of type AC & type Hi tripping characteristic
  • Suitable for commercial & industrial applications


Better coordination & discrimination
  • Adjustable sensitivity and trip time delay for better coordination and discrimination among earth leakage devices


IP2x terminal design
  • Finger proof design for operator safety


Reliable protection
  • RCD AoB must be engaged to switch on a circuit. It ensures earth-leakage protection under all circumstances


Low inventory
  • One common rating suitable for 80,100 & 125A MCBs


High breaking capacity
  • Combined unit (MCB+AoB) provides 10kA breaking capacity
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