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4.13
RCCB Add-on Blocks Type AC for MCB Devices
HMF, HMC, HMD
Fixed
• High sensitivity 30 mA
Instantaneous
• Low sensitivity 300 mA
Instantaneous
Adjustable
• Sensitivity I∆n 0.3-0.5 - 1A
• 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 thumb wheel on
the front face. The setting
thumb wheels are protected by a
transparent sealable cover.
Disassembly
The bistable latch (2 positions)
facilitate the assembly or
disassembly 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.
High Immunity
High Immunity reduces the
unexpected tripping when
protecting equipment that may
generate disturbances (micro-
processing, electronic ballast,
etc.)
The earth fault is indicated when
the handle is in lower position
(yellow colour). Test button for
earth fault check.
Tightening Compensation
Cages
These circuit breaker blocks are
equipped with screw cages with
tightening compensation,
reinforcement arch and cable
holding jaws. These elements
contribute to an effective
tightening over time.
Connection Capacity
• 35mm
2
flexible connection
(50º possible with some
terminals),
• 70mm
2
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
keying systems avoiding the
omission of terminal
tightening downstream of the
circuit breaker.
Nominal voltage: -15 +10 %
2 Poles: 230V
three and four pole: 230 / 400V
test button: 230 / 400V.
In conformity with the
requirements of the Appendix G
of the BS EN 61009-1.
In conformity with the
requirements of standard
BS EN 60947-2.
Double Pole RCD Add-On Blocks
Sensitivity
In/A
Width
Cat ref.
Fixed / Adjustable l∆n
(105mm)
Fixed 30mA
125A 6 Mod
BDC280E
Adjustable 0.3-0.5-1A
125A 6 Mod
BTC280E
Time Delayed 0-60-150ms
Triple Pole RCD Add-On Blocks
Sensitivity
In/A
Width
Cat ref.
Fixed / Adjustable l∆n
(105mm)
Fixed 30mA
125A 6 Mod
BDC380E
Adjustable 0.3-0.5-1A
125A 6 Mod
BTC380E
Time Delayed 0-60-150ms
Four Pole RCD Add-On Blocks
Sensitivity
In/A
Width
Cat ref.
Fixed / Adjustable l∆n
(105mm)
Fixed 30mA
125A 6 Mod
BDC480E
Fixed 300mA
125A 6 Mod
BFC480E
Adjustable 0.3-0.5-1A
125A 6 Mod
BTC480E
Time Delayed 0-60-150ms
BTC280E
BDC380E
BDC480E
Protection
Devices