The present disclosure relates to a supplementary isolating device for remote operation of a circuit breaker with interlocking functionality. The supplementary isolating device includes: an electrical disconnection switch manoeuvrable between a mechanically lockable first position and a mechanically lockable second position, which electrical disconnection switch is configured to be connected in the control circuit of a circuit breaker for an electrical drive system, wherein the supplementary isolating device is configured to send a first control voltage to the circuit breaker to provide an electrical disconnect and interlocking the operation of the circuit breaker, when the electrical disconnection switch is in the first position, an electric terminal configured to be connected to an auxiliary contact of the circuit breaker to obtain an operational status of the circuit breaker, and an indicator configured to indicate the operational status of the circuit breaker.

A fuseless switch for a cross phase of a power line communication (PLC) network includes a movable contactor, a switch, an electromagnetic tripper, a base and a microcontroller. The microcontroller further includes a low-voltage coupler electrically connected to a first ground line of the first circuit connection terminal and a second ground line of the second circuit connection terminal, so that a network connection signal can cross phases to complete the transmission of information. When a PLC network signal passes through the fuseless switch, the signal proceeds from the low-voltage coupler without being affected or attenuated by the original fuseless switch circuit, so as to overcome the issue of transmitting signals through the power line to other circuits.

A fuseless switch for a cross phase of a power line communication (PLC) network includes a movable contactor, a switch, an electromagnetic tripper, a base and a microcontroller. The microcontroller further includes a low-voltage coupler electrically connected to a first ground line of the first circuit connection terminal and a second ground line of the second circuit connection terminal, so that a network connection signal can cross phases to complete the transmission of information. When a PLC network signal passes through the fuseless switch, the signal proceeds from the low-voltage coupler without being affected or attenuated by the original fuseless switch circuit, so as to overcome the issue of transmitting signals through the power line to other circuits.

The present disclosure relates to a 3-phase undervoltage trip device capable of automatically tripping a circuit breaker based on an under-voltage of a 3-phase line voltage, including lines to which a 3-phase power is applied. The undervoltage trip device is connected to lines to which a 3-phase power is applied and configured to operate to automatically trip a circuit breaker when an open phase condition occurs on any one of three phases of the power. As the undervoltage trip device automatically trips the circuit breaker when the open phase condition occurs on any one of three phase, occurrence of the open phase condition due to disconnection or an accident on the line may be easily detected.

The present disclosure relates to a 3-phase undervoltage trip device capable of automatically tripping a circuit breaker based on an under-voltage of a 3-phase line voltage, including lines to which a 3-phase power is applied. The undervoltage trip device is connected to lines to which a 3-phase power is applied and configured to operate to automatically trip a circuit breaker when an open phase condition occurs on any one of three phases of the power. As the undervoltage trip device automatically trips the circuit breaker when the open phase condition occurs on any one of three phase, occurrence of the open phase condition due to disconnection or an accident on the line may be easily detected.

A protective device for use in an electrical voltage distribution system providing voltage from a power source to a load, the device including: a housing having a user accessible surface; a plurality of line terminals configured to electrically connect to the power source and a plurality of load terminals configured to electrically connect to the load; a circuit interrupter including a solenoid and a set of interrupting contacts that connect at least one line terminal and at least one load terminal in a reset state and disconnect the at least one line terminal and the at least one load terminal in a tripped state, the solenoid driving the interrupting contacts from the reset state to the tripped state when activated by a switching device; a voltage detection element configured to detect voltage across the plurality of line terminals and generate a line voltage rejection signal when greater than a predetermined overvoltage; a reset assembly including a reset button available via the user accessible surface and a reset switch operatively coupled to the reset button, the reset switch when operated causing a reset signal to be generated when the line voltage rejection signal is absent but not when the line voltage rejection signal is present; and a reset prevention mechanism configured to prevent the circuit interrupter from entering the reset state when the reset signal is absent.

The present application relates to a coil actuator for low and medium voltage applications, which comprises a electromagnet operatively associated with a movable plunger, a power & control unit electrically connected with the electromagnet and first and second input terminals (T1, T2) operatively connected with the power & control unit, wherein an input voltage (VIN) is applied between said first and second input terminals during the operation of the coil actuator. The coil actuator further comprise a third input terminal (T3) operatively connected with the power & control unit, the third input, terminal being adapted to be in a first operating connection (A), which correspondences to normal control conditions (NDC) for the operation of the electromagnet, or in a second operating condition (B), which corresponds to overriding control conditions (ODC) for the operation of said electromagnet. The power & control unit is adapted to control the operation of the electromagnet according to the normal control conditions or the overriding control conditions depending on the operating condition (A, B) of the third input terminal.

The present invention discloses an intelligent circuit breaker capable of automatically releasing and tripping in power failure, with an electromagnetic force capable of controllably changing a current direction arranged between a permanent magnetic field force and a mechanical spring force, and three forces are designed on a straight line, the permanent magnet static iron core, the electromagnetic moving iron core and the electromagnetic coil are respectively fixed on the electromagnetic coil framework through a first shaft hole, a second shaft hole and a wire slot, a tripping energy storage spring is sleeved on the tripping transmission rod, a permanent magnet attraction reset shifting fork is arranged in a shifting groove of the tripping transmission rod, and one end of the tripping transmission rod is provided with a tripping connecting rod.

An electrical switch for an electric power tool. The electrical switch has a contact system that can be switched between an off position and an on position, and having a movable actuating means or switching the contact system. The actuating means comprises a plunger and a contact piece. The contact piece acts on the contact system for the purpose of switching. A coupling element is provided, such that the plunger can be brought into and out of interaction with the contact piece. The interaction is effected such that it is made possible for the contact system to be switched into the on position and the off position by means of the plunger, and for the contact system to be switched into the off position independently of the plunger.

An electrical switch for an electric power tool. The electrical switch has a contact system that can be switched between an off position and an on position, and having a movable actuating means or switching the contact system. The actuating means comprises a plunger and a contact piece. The contact piece acts on the contact system for the purpose of switching. A coupling element is provided, such that the plunger can be brought into and out of interaction with the contact piece. The interaction is effected such that it is made possible for the contact system to be switched into the on position and the off position by means of the plunger, and for the contact system to be switched into the off position independently of the plunger.