US 5,933,065 AGranted

Control and signalling device for protective switching apparatus

AssigneeSchneider Electric SA

InventorPierre Duchemin

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Abstract

The present invention relates to a control and signalling device for a protective switching apparatus of the relay switch type which is provided with power switches (1) and a protection assembly (4) and is capable of detecting faults (overloads or overcurrents) on each current path associated with a switch (1), this device being actuated by a manual control member (51) which can take an operating "run" position corresponding to closed contacts, a "stop" position corresponding to open contacts and a "trip" position corresponding to the position after detection of a fault, characterised by the fact that it comprises a mobile spring loaded cam (52) actuated by a triggering spring (54) and capable of--from the "run" position in which it is locked by an automatic interlock (55) and after the triggering and release of the interlock (55)--of turning the manual control member (51) which then actuates the coil switch (81).

Claims20

Dependent claims

A protective switching apparatus for a control and signaling device comprising:

a coil switch;
a manual control member moveable between a run position corresponding to closed contacts in said coil switch, a stop position corresponding to open contacts in the coil switch, and a trip position corresponding to the position after detection of a fault;
a mobile spring loaded cam moveable between a locked position and a tripped position, said mobile spring loaded cam including a triggering spring lobe, an interlock lobe, and a cut off lobe configured to communicate with the coil switch when said cam is in the tripped position;
a triggering spring with a first end connected to said triggering spring lobe, said triggering spring biases said mobile spring loaded cam to open said coil switch;
and
an automatic interlock which releasably locks said interlock lobe and thereby locks said mobile spring loaded cam in the locked position against the bias provided by said triggering spring;
wherein said interlock is configured to release said interlock lobe after said interlock is triggered thereby allowing said cam to open said coil switch.

4 more elements

Dependencies are inferred from the claim text.