An indicating device for a dual power automatic transfer switch, which includes a first driving part connected to a first moving contact of a first power supply and a second driving part connected to a second moving contact of a second power supply; the indicating device includes a mechanical indicating device, an electrical indicating device and an indicating part acting on the mechanical indicating device and the electrical indicating device; the first and the second driving part respectively drive the indicating part to move; the electric indicating device at least includes a first and second switching device; the first switching device at least includes a first contact of the first switching device and a second contact of the first switching device which are connected in parallel; the second switching device at least includes a first contact and a second contact of the second switching device which are connected in parallel.

A support-assembly suitable for a micro-switch of a switching device, including bracket-support-means suitable for being connected, in a stationary position, to a frame portion of the switching-device, coupling-protrusion-component shaped for being provided at an end of an operating-shaft of the micro-switch and for movably engaging with the bracket-support-component. The coupling-protrusion-component and the bracket-support-component being configured for enabling a rotation of the operating-shaft around a rotation-axis and for preventing a movement of the operating-shaft transversely to the rotation-axis.

An electric switching device for a low voltage circuit includes an electronic unit configured to be operatively connected to a first communication bus implementing a first communication protocol, a communication module configured to be operatively connected to the first communication bus and to a second communication bus implementing a second communication protocol, which is different than the first communication protocol. The communication module is configured to place the first communication bus in communication with the second communication bus, and to detect a condition of the switching device and make it available externally thereto by means of the first communication bus and/or the second communication bus.

A device having an armature including a main wall; a rotary part intended to be mechanically coupled to a control shaft of an electrical switching unit; a bar integral with the rotary part and able to rotate between a first position and a second position and extending through a slot in the main wall; a position sensor having a movable contact pushed into a retracted position by the bar when the bar is in the first position; a stabilizing device having a resilient strip extending along the slot in order to exert a retaining force on the bar when it is in the first position.

An apparatus for auxiliary contact of a circuit breaker includes a frame, a fixed contactor fixed to the frame inside the frame, a movable contactor installed inside the frame to be contacted with or separated from the fixed contactor, and a contact control member installed inside the frame, the contact control member being formed in a straight line shape, the contact control member being pressurized upward as an overcurrent is applied to the circuit breaker to allow the movable contactor to be contacted with or separated from the fixed contactor.

An improved multi-pole circuit interrupter includes an improved trip deck assembly adjacent one pole and further includes an accessory deck adjacent another pole. The accessory deck includes conventional accessory devices such as an auxiliary switch, etc., and the trip deck assembly includes switches and one or more other devices that can interact with a crossbar and a trip bar of the circuit interrupter. Such switches can be easily installed by a technician in the field after manufacture of the circuit interrupter. One switch is held in place by a support, and the other switch is held in place by a retainer, with the support and the retainer holding the switches in a fixed position on the trip deck assembly in order to interact with the crossbar and the trip bar.

An adapter for installing at least one accessory part into an electrical switch. The accessory part has at least one interface and the electrical switch has a housing and at least one actuation element. The adapter has at least one deflection gear mechanism, which, when the adapter is installed in the housing of the electrical switch, is arranged in an operatively connecting manner between the at least one interface of the accessory part and the at least one actuation element of the electrical switch.

A shunt trip assembly structured to be operatively coupled to a number of circuit breakers uses a lever to actuate an operating mechanism of the circuit breakers and uses a selectively powered solenoid to power the lever. The shunt trip assembly is composed from a standardized shunt assembly designed for use with a plurality of different solenoid coils, such that a given standardized shunt assembly will be operative regardless of which of the solenoid coils are added to the standardized shunt assembly. The shunt trip assembly requires less than 10 amps of current to operate; can be powered by any of a 12 volt AC/DC, 24 volt AC/DC, or 48 volt AC/DC power source; and is functional in temperatures ranging from −40° C. to +60° C.

An auxiliary/control switches kit box for a Medium Voltage switching device including one or more movable contacts operated between a contact open position and a contact closed position by a kinematic chain connected to a contact actuator. The auxiliary/control switches kit box includes: a shaped enclosure adapted to be inserted into and removed from a dedicated volume inside the Medium Voltage switching device; the shaped enclosure housing one or more auxiliary/control switches electrically connected to corresponding one or more terminal boards; the one or more terminal boards facing toward the outside of the shaped enclosure from a first face of the shaped enclosure; the one or more auxiliary/control switches each including a pair of auxiliary/control switch contacts that can be linearly operated by an auxiliary/control switch actuator between a normally open (NO) position and a normally closed (NC) position; a mechanical coupling system mechanically connected to the auxiliary/control switch actuator to linearly displace it between the NO position and the NC position; the mechanically coupling system having one or more operating levers protruding outside the shaped enclosure from a second face thereof and being adapted to cooperate with the kinematic chain of the Medium Voltage switching device and follow it during the movement from the contact open position and the contact closed position.

A high-precision gas density relay includes a housing, a base, an end seat, a Bourdon tube, a temperature compensation element, a signal regulation mechanism, and a plurality of microswitches. The microswitches are button microswitches. The density relay further includes microswitch contact trigger elements made of elastic material. One end of each microswitch contact trigger element is fixed inside the housing, and the other end is arranged corresponding to a button of a button microswitch, abutting the button of each button microswitch in one-to-one correspondence. When the gas density value changes, the Bourdon tube and the temperature compensation element generate displacements, which successively drive the microswitch contact trigger elements through the signal trigger mechanism.