ABB DS 941 Montage- Und Betriebsanleitung Seite 20

should be coordinated in accordance with CEI 64-8/IEC 364
regulations.
- If the residual current breaker has a high sensitivity (IÆn ² 0.03 A),
additional protection against direct contacts is also supplied.
- Install the residual current breaker on a panel or case having an
IP...protection level which is adeguate to the environment or its
use, according to CEI 64-8 (IEC 364) regulation requirement .
- Connect the equipment exactly as indicated.
- Switch on all loads of the circuit to be protected. If the residual
current breaker is released, then it should be determined, by
inserting one load after another, which one of them trigger the
release: this load should then be removed from the system and
checked.
- Push the test button. If the residual current breaker is properly
installed and powered, it should release.
- If the electric system is very wide, then even the natural current
leakage to earth may be high. In this event there is a possibility
of inopportune releases: to avoid this, the system should be
subdivided into at least two independent circuits, each of which
should be protected by a residual current circuit breaker.
- Electrical disturbances of external (storms) or internal (high
reactance loads) origin may cause high overvoltages that may in
turn cause, first of all, damage to electronic components of the
equipment, and the inopportune releases of the residual current
circuit breaker. Therefore, it is first necessary to protect electricity
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