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4.4 Plug-in and draw-out technology
Signal "Position of molded case circuit breaker in the draw-out unit"
Up to three position signaling switches can be integrated in the draw-out unit in order to
transmit breaker position information to monitoring and control systems. They are installed in
the right-hand side wall of the unit at the positions indicated in the diagram below:
①
②
③
Signal "Position of molded case circuit breaker in the draw-out unit"
It is irrelevant whether the position signaling switch is inserted in slot a or b. Only one
position signaling switch per position is usually installed. The remaining free slots can be
used for the signaling switches of the communication link kit or for an additional position
signaling switch.
If the molded case circuit breaker in the draw-out unit is moved into a defined position with
the crank handle, the corresponding position signaling switch outputs a signal that can be
further used electrically, e.g. for visual or acoustic alarm indications.
If the molded case circuit breaker is not in any of the defined positions, the breaker status
indicator displays the word UNBLOCK on a white background. In this position, the molded
case circuit breaker is either off (position OFF, contacts open) or tripped (position TRIP,
contacts open). The breaker main contacts cannot be closed with the breaker in the
UNBLOCK state.
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41a or 41b: Detects position CONNECT
42a or 42b: Detects position TEST
43a or 43b: Detects position DISCON
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
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