A switch module with a built-in structure of anti-surge and dual disconnection mainly comprises an overcurrent protection switch having plates and insulating elements for anti-surge and dual disconnection structure ingeniously built inside a heat-resisting housing. The switch module has a first connecting point and a second connecting point for operation. When overvoltage occurs, temperature of at least one metal oxide varistor would instantly rise up to a degree higher than the melting point thereof, melting at least one thermo-sensitive piece, loosening at least one spring element, displacing a pushing element and thus forcing the connecting points detaching from each other to turn off the switch and stop supplying electricity power; meanwhile, insulating elements would isolate conductive components such as thermo-sensitive pieces, spring elements and plates to further ensure a complete disconnection and more of electricity safety.

A surge protection device comprises at least one surge protection unit, consisting of a substantially U-shaped socket part and a plug part which can be fixed in the socket part and which receives a surge protector. Insulated electric conductors on or in the socket part are contacted by vampire taps or displacing terminals. The surge protection device also comprises openings or perforations formed in the socket part for receiving conductors. The openings are selectively designed so that the electric conductors are inserted into or through the openings, and the openings are exposed in a socket part region which can be covered by the socket part such that cutting surfaces located on the base of the plug part penetrate the conductor insulation during the plug-in process and directly contact the respective conductor.

A surge protection device comprises at least one surge protection unit, consisting of a substantially U-shaped socket part and a plug part which can be fixed in the socket part and which receives a surge protector. Insulated electric conductors on or in the socket part are contacted by vampire taps or displacing terminals. The surge protection device also comprises openings or perforations formed in the socket part for receiving conductors. The openings are selectively designed so that the electric conductors are inserted into or through the openings, and the openings are exposed in a socket part region which can be covered by the socket part such that cutting surfaces located on the base of the plug part penetrate the conductor insulation during the plug-in process and directly contact the respective conductor.

An overvoltage protection apparatus may include a first connection for coupling to an N line, and at least one voltage-limiting element which is designed to block the current through the voltage-limiting element up to a predefinable threshold value of the voltage dropped across the voltage-limiting element and to conduct the current above this threshold value. The overvoltage protection apparatus may further include a second connection for coupling to a metal housing of an electrical apparatus, at least one capacitor, and at least one first non-reactive resistor. The at least one capacitor, the at least one first non-reactive resistor and the at least one voltage-limiting element are connected in series between the first connection and the second connection.

An overvoltage protection apparatus may include a first connection for coupling to an N line, and at least one voltage-limiting element which is designed to block the current through the voltage-limiting element up to a predefinable threshold value of the voltage dropped across the voltage-limiting element and to conduct the current above this threshold value. The overvoltage protection apparatus may further include a second connection for coupling to a metal housing of an electrical apparatus, at least one capacitor, and at least one first non-reactive resistor. The at least one capacitor, the at least one first non-reactive resistor and the at least one voltage-limiting element are connected in series between the first connection and the second connection.

A switch module with a built-in structure of anti-surge and dual disconnection mainly comprises an overcurrent protection switch having plates and insulating elements for anti-surge and dual disconnection structure ingeniously built inside a heat-resisting housing. The switch module has a first connecting point and a second connecting point for operation. When overvoltage occurs, temperature of at least one metal oxide varistor would instantly rise up to a degree higher than the melting point thereof, melting at least one thermo-sensitive piece, loosening at least one spring element, displacing a pushing element and thus forcing the connecting points detaching from each other to turn off the switch and stop supplying electricity power; meanwhile, insulating elements would isolate conductive components such as thermo-sensitive pieces, spring elements and plates to further ensure a complete disconnection and more of electricity safety.

A transition assembly for interconnecting a hybrid trunk cable and electronic equipment includes: an enclosure having first and second ends, first and second side walls, and a cavity; a hybrid trunk cable comprising first and second sets of pluralities of power conductors and a plurality of optical fibers, wherein the first and second sets of power conductors enter the enclosure at the first end; first and second sets of pluralities of connectors mounted to at least one of the first and second side walls; and an overvoltage protection module (OVP module).

The invention relates to a surge protection device, comprising at least one surge arrester and one short-circuit switching device which is connected in parallel with the surge arrester, can be thermally tripped and is spring-pretensioned, wherein the abovementioned means form one physical unit. The thermal tripping means is arranged in the region where heating of the surge arrester is expected when it is overloaded, and operating or surge current does not flow through said thermal tripping means. The thermal tripping means is in the form of a stop part which releases an unlocking slide of the switching device in the event of thermal overload. The switching device has two opposite contact pieces, wherein at least one of the contacts is of moveable design and is under spring pretension in the closing direction of the switching device. The opening state of the switching device is ensured by the unlocking slide and is released by the thermal tripping means for closing the switching device.

A voltage and/or current sensing device for low-, medium- or high voltage switching devices is disclosed as a constructively enhanced measuring device with high performance for use in switching devices. The sensing device can include a first voltage sensing part, a second voltage sensing part and a current sensing part all arranged in a same common single housing separated, from the switching device, in a way that an output wire from the first voltage sensing part, for sensing voltage at an upper terminal of the switching device, is located close to the current sensing part, the output wire being applied with an insulating cover, and mechanically fixed to the current sensor part, and/or the output wire being implemented in an isolation body, and only located near to the current sensing part.

A protection circuit for a simulated battery cell having an output comprising an output voltage includes: at least one MOSFET connected to the output of the simulated battery cell for short-circuiting the output of the simulated battery cell; a capacitor connected to a gate electrode of the at least one MOSFET; an overvoltage detection device configured to charge the capacitor with the output voltage based on an overvoltage limit of the output voltage being exceeded; and a threshold voltage detection device configured to release the gate electrode based on a threshold value of a voltage at the capacitor not being reached.