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RCD add-on blocks type AC , type A & HI

RCD add-on blocks for circuit Breakers HMB, HMC, HMD, HLE, HLF, HMK, HMX.

Fixed :

  • high sensitivity 30 mA – instantaneous
  • average sensitivity 300 mA – instantaneous.

Settings :

– sensitivity In 0.3 – 0.5 – 1 A …
– delay t 0 – 60 -150 ms.

  • These devices are intended to be fixed on the right side of the circuit breakers to form differential circuit breakers from 80 to 125A, two, three or four-pole.
  • This “circuit breaker + block” ensures, in addition to the overload and short circuit protection, the protection of the installations against the insulation defects (300mA and 1A) and the protection of the people against the direct contacts (30mA) and indirect (300mA).

Adjustable blocks :

  • The setting is done by actuating the thumbwheel in front face.
  • The setting thumbwheels are protected by a transparent sealable cover.

Dissassembly :

  • The bistable latch (2 positions) facilitate the assembly or dissassembly by the bottom of the “circuit breaker + block.”
  • These RCD add-on blocks exist in version AC and in version A-HI.

Version AC :

  • The add-on blocks are protected against unexpected tripping caused by the transitory leakage currents : lightning, capacitive loading.

Version A HI :

  • Type A : when the electrical load is likely to produce fault component dc pulsating current, the protection of the people must be carried out by differentials of type A.

HI (High Immunity) :

  • The products with “reinforced immunity” reduce the unexpected tripping when they protect equipment generating disturbances (micro-processing, electronic ballast,…)
  • The differential defect or earth fault is visualized by the rearmament handle of the block in low position (yellow colour).
  • Test button for differential functioning check.

Tightening compensation cages

  • These circuits breakers blocks are equipped with screw cages with tightening compensation, reinforcement arch, cable holding jaws. These elements contribute to an effective tightening over time.

Connection capacity :

– 35mm2 flexible connection (50mm2 possible with some terminals),
– 70mm2 rigid connection.

Assembly and disassembly facilitated by the drawer assembly system. The terminal cover is dependent of the add-on block. It is provided with jeying systems avoiding the omission of terminal tightening downstream of the circuit breaker. .

  • Nominal voltage: -15 +10 %
  • 2 poles: 230 V
  • Three and four-pole: 230/400 V
  • Test button: 230/400 V.

In conformity with the requirements of the appendix G of the IEC 61009-1.

In conformity with the requirements of standard IEC 60947-2.

 Designation  Sensitivity fixed / adjustable IΔn
 In/A Width in ❚ 17.5mm Cat. Ref. add-on blocks AC
Cat. Ref. add-on blocks A-HI
BTC280E  Add-on blocks 2 poles Fixed  125A 6 BDC280E BDH280E
 2 P.P. 30 mA
2 poles add-on blocks Adjustable  125A 6 BTC280E BTH280E
0.3 – 0.5 – 1 A
0 – S 60 – 150
BTC280E
BTH380E  Add-on blocks 4 poles Fixed  125A 6 BDC380E BDH380E
 3 P.P 30 mA
3 poles add-on blocks Adjustable  125A 6 BTC380E BTH380E
0.3 – 0.5 – 1 A
0 – S 60 – 150
BTH380E
BDC480E  Add-on blocks 4 poles Fixed  125A 6 BDC480E BDH480E
 4 P.P 30 mA
4 poles add-on blocks Fixed  125A 6 BFC480E BFH480E
300 mA
Adjustable  125A 6 BTC480E BTH480E
0.3 – 0.5 – 1 A
0 – S 60 – 150
 BDC480E
 Association circuit breaker + add-on block 4 poles adjustable
Association circuit breaker + add-on block 4 poles adjustable