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Accessories

Auxiliary switches, alarm switches and position signaling contacts

Auxiliary releases

Motor operators

Front mounted motor operator

Motor operator actuation controlled via control cable

Motor operator actuation controlled via control cable and undervoltage release

This circuit is deployed in order to prevent no-load operation of the molded case circuit breaker. The contact of auxiliary contactor K1 prevents no-load operation when the undervoltage release "U<" is de-energized.

No-load operations subject the molded case circuit breaker to high stresses. If the undervoltage release is de-energized, auxiliary contactor K1 has not picked up. The contact in the ON circuit (control circuit) of the motor operator is thus not closed, that is, the molded case circuit breaker cannot be switched.

This auxiliary contactor is not necessary when the undervoltage release is supplied uninterrupted (e.g. pushbutton S01) from the same source as the motor operator itself (e.g. contact 3).

Plug-in and draw-out units

RCD basic

Changeover contacts for auxiliary switches AUX, trip alarm switches TAS and electrical alarm switches EAS, position signaling switches for plug-in and draw-out units

Leading changeover contacts for leading changeover switch LCS

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Undervoltage release UVR

Undervoltage release with leading NO contacts UVR (LNO)

Universal release UNI

Shunt trip

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S0

OFF (to be provided by customer)

S1

ON (to be provided by customer)

F1

Fuse in the control circuit (to be provided by customer)

L1

Indicator light AUTO mode (to be provided by customer)

L2

Indicator light MAN mode (to be provided by customer)

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S0

OFF (to be provided by customer)

S1

ON (to be provided by customer)

S01

Remote command (to be provided by customer)

K1

Auxiliary contactor (to be provided by customer)

U<

Undervoltage release (to be provided by customer)

F1

Fuse in the control circuit (to be provided by customer)

L1

Indicator light AUTO mode (to be provided by customer)

L2

Indicator light MAN mode (to be provided by customer)

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Plug-in units, 3-pole and 4-pole, with two optionally integrated position signaling switches for signaling "Plug-in unit - MCCB correctly bolted to plug-in socket".

Draw-out units, 3-pole and 4-pole, with an optional switch for signaling the condition "Draw-out unit locked / open" and six optionally integrated position signaling switches for signaling "Position of breaker in the draw-out unit".

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Side mounted RCD basic, 3-pole and 4-pole

Loadside RCD basic, 3-pole and 4-pole

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