A direct current electric circuit interrupting switch assembly for establishing of electric connection comprising: a primary electric conductor and a secondary electric conductor integrated between a direct voltage electric source and at least one load; wherein said primary electric conductor of the switch assembly comprises two branches, which are in parallel connected with each other, of which the first branch includes an electric fuse with a melting member and the second branch includes a pyroswitch with an interrupting member, which is capable to interrupt said second branch of the primary electric conductor extending through said pyroswitch, as well as an actuator, which is capable to ensure appropriate movement of said interrupting member due to interruption of said second branch of the primary electric conductor; wherein said pyroswitch comprises such interrupting member, which is within said pyroswitch displaceable from a first position, in which by means of it said second branch of the primary electric conductor is uninterrupted and in which said interrupting member is held at a sufficient distance apart from the secondary electric conductor, into a second position, in which the electric circuit throughout the second branch of the primary electric conductor is interrupted and the interrupting member is held in an electric conductive contact with the secondary conductor of the switch assembly; wherein said switch assembly is furnished with an electric circuit, which includes a thermal electric fuse with a contact member as well as an electromagnetic switch, which is activated by exceeding of a pre-determined value of electric current, wherein said fuse and said switch are connected parallel with each other.

A bypass switching assembly includes a source terminal configured for connection to an electrical source; a load terminal configured for connection to a load; a switch including: a first electrically conductive element, a second electrically conductive element, and an electrically conductive bypass element; and an interlock assembly including: an insulator configured to rotate; and a locking assembly configured to interact with the insulator to prevent movement or permit movement of at least one of the first electrically conductive element and the second electrically conductive element.

A variety of active cover plate configurations with prongs configured to contact side screw terminals of electrical receptacles are described. In one illustrative embodiment, an active cover plate includes a multi-gang face plate configured to be installed over a multi-gang light switch installation, the multi-gang faceplate including at least two apertures sized to accept a manually manipulatable element of switches in the multi-gang light switch installation. Prongs extend rearward from the multi-gang faceplate around at least one of the apertures.

Embodiments of the disclosure provide for a system and method for determining a circuit breaker position in a power distribution/load center. In one embodiment, the load center includes a plurality of circuit breakers. Each circuit breaker includes a base and a plurality of contact components coupled to the base. In that regard, an activation of a combination of the contact components indicates a position of the circuit breaker within the load center. The activation of the combination indicates that one or more of the contact components is in contact with one or more pegs coupled to the load center. When this occurs, a data transceiver coupled to each of the contact components transmits a data signal. The data signal includes a plurality of data bits, where each data bit indicates whether a corresponding contact component of the combination is activated or not activated.

An apparatus includes a circuit breaker having main contacts configured to be coupled within an electrical line. The circuit breaker also has trip contacts and auxiliary contacts. A protection relay is electrically coupled to the trip contacts of the circuit breaker and is configured to trip the circuit breaker. A trip circuit supervision relay has a first coil electrically coupled to the auxiliary contacts of the circuit breaker and a second coil electrically coupled to the trip contacts of the circuit breaker. The first coil and the second coil are magnetically coupled to each other. The trip circuit supervision relay is single circuit supervision relay that includes both first coil and the second coil and is configured to be magnetically operated by either of the first coil and the second coil.

An electrical interruption switch for interrupting high currents at high voltages includes a casing, surrounding a contact unit defining a current path through the switch, and a pyrotechnic material, comprising a gas and/or shock wave-generating, activatable material. The contact unit has first and second connection contacts and a separation region. The pyrotechnic material and contact unit are formed such that a current to be interrupted is supplied to the contact unit via the first connection contact and discharged therefrom via the second connection contact, or vice versa. When the pyrotechnic material is ignited, the separation region is exposed to a gas pressure and/or shock wave, such that the separation region is torn open, caved in or separated. At least one chamber in the switch, at least partially delimited by the separation region, is filled with a filling material.

In an embodiment a thermal protection device includes a housing, a varistor partly embedded in the housing, wherein the housing electrically insulates the varistor, and wherein the varistor includes a partly uninsulated contact surface, an inner wall of insulating material arranged adjacent to the contact surface of the varistor, a window in the inner wall configured to allow an electrical connection of the contact surface of the varistor in an operational state of the thermal protection device and a moveable insulation block configured to cover the window in the inner wall to insulate the varistor in a region of the window of the inner wall in a fault state of the thermal protection device.

The present disclosure relates to a withdrawable base module for a switch. The withdrawable base module comprises a base coupled to a busbar for electrically connected to the switch; a conversion assembly coupled to the base and comprising a drive mechanism, a first female contact and a carrying mechanism adapted to carry the switch; and an auxiliary assembly being slidable relative to the conversion assembly and comprising a first male contact electrically connected to the switch; wherein the drive mechanism is operable to drive the auxiliary assembly to cause the first male contact to move towards and contact the first female contact. The withdrawable base module according to embodiments of the present disclosure can provide a test circuit for the switch, and can achieve the rocking-in or rocking-out of the switch without additional human intervention after completion of the test.

A system for sequentially interconnecting battery modules of a battery pack is disclosed. The battery pack may comprise first, second and third battery modules. Each of the first, second and third battery modules includes a first power output terminal and a second power output terminal. Each of the first power output terminals is of a first polarity and the each of the second power output terminals is of a second, opposite polarity. The system comprises a control module for providing a control signal to sequentially interconnect the battery modules, a first interconnect controller electrically disposed between the first and second battery modules, and a second interconnect controller electrically disposed between the second and third battery modules. Each of the first and second interconnect controllers includes a contactor comprising a main contact, an auxiliary contact and an actuating coil for closing the respective main contact and auxiliary contact. The actuating coil of the first interconnect controller responds to the control signal to close the respective main contact, coupling the first battery module to the second battery module, and to close the respective auxiliary contact to pass the control signal to the second interconnect controller. The actuating coil of the second interconnect controller responds to the passed control signal from the first interconnect controller to close the respective main contact of the second interconnect controller, coupling the third battery module to the previously connected first and second battery modules.

The emergency stop switch unit 2 as an operation switch unit includes a direct operation part 20A and an alternative operation part 20B. The direct operation part 20A has an emergency stop button 21 adapted to be directly operated. The alternative operation part 20B is adapted to be linked with the direct operation part 20A and alternatively operates the emergency stop button 21 in place of the direct operation part 20A. The alternative operation part 20B has a reception part 32 that detects a remote operation of the emergency stop button 21 and an electromagnetic solenoid 3 that actuates the emergency stop button 21 on the basis of the remote operation detected by the reception part 32.