Chapter A General rules of electrical installation design

F36
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F - Protection against electric shock
Industrial circuit-breakers with an integrated
RCD are covered in IEC 60947-2 and its
appendix B
Household or domestic circuit-breakers with
an integrated RCD are covered in IEC 60898,
IEC 61008 and IEC 61009
8 Residual current devices (RCDs)
8.1 Types of RCDs
Residual current devices (RCD) are commonly incorporated in or associated with the
following components:
b Industrial-type moulded-case circuit-breakers (MCCB) conforming to IEC 60947-2
and its appendix B and M
b Industrial type miniature circuit-breakers (MCB) conforming to IEC 60947-2 and its
appendix B and M
b Household and similar miniature circuit-breakers (MCB) complying with IEC 60898,
IEC 61008, IEC 61009
b Residual load switch conforming to particular national standards
b Relays with separate toroidal (ring-type) current transformers, conforming to
IEC 60947-2 Appendix M
RCDs are mandatorily used at the origin of TT-earthed installations, where their
ability to discriminate with other RCDs allows selective tripping, thereby ensuring the
level of service continuity required.
Industrial type circuit-breakers with integrated or adaptable
RCD module (see Fig. F63)
Industrial type circuit-breaker
Vigi Compact
Fig. F63 : Industrial-type CB with RCD module
Fig. F64 : Domestic residual current circuit-breakers
(RCCBs) for earth leakage protection
Schneider Electric - Electrical installation guide 2008
Multi 9 DIN-rail industrial
Circuit-breaker with adaptable Vigi RCD module
Adaptable residual current circuit-breakers, including DIN-rail mounted units (e.g.
Compact or Multi 9), are available, to which may be associated an auxiliary RCD
module (e.g. Vigi).
The ensemble provides a comprehensive range of protective functions (isolation,
protection against short-circuit, overload, and earth-fault.
Household and similar miniature circuit-breakers with RCD
(see Fig. F64)
The incoming-supply circuitbreaker
can also have timedelayed
characteristics and
integrate a RCD (type S).
“Monobloc” Déclic Vigi residual current circuit-breakers
intended for protection of terminal socket-outlet circuits
in domestic and tertiary sector applications.