A circuit arrangement for a surge protection device for protecting multiple DC or AC power lines. The circuit arrangement includes a plurality of DC or AC power line inputs, a negative potential or neutral input, a ground potential input, a surge protection component having one or more surge elements, a rectification circuit including a plurality of diodes, and an alarm circuit for receiving a status output from the surge protection component.

A circuit arrangement for a surge protection device for protecting multiple DC or AC power lines. The circuit arrangement includes a plurality of DC or AC power line inputs, a negative potential or neutral input, a ground potential input, a surge protection component having one or more surge elements, a rectification circuit including a plurality of diodes, and an alarm circuit for receiving a status output from the surge protection component.

Disclosed in the present invention are a linkage mechanism, a base, and a surge protection device. The linkage mechanism comprises a linkage swing rod and transmission components, wherein the linkage swing rod is arranged to be rotatably connected, and is provided with a trigger portion capable of triggering a switch when rotating and at least two stress portions arranged spaced apart from each other on one side of an axis of rotation of the linkage swing rod; one transmission component is arranged corresponding to each of the stress portions; and the transmission components are arranged in such a way that any of the transmission components applies a pushing force to the stress portion to rotate the linkage swing rod, and thus the trigger portion triggers the switch. According to the surge protecting device using the linkage mechanism provided in the present invention, a module failure signal can be sent out when any surge protection module fails under the condition where only one microswitch is arranged, which not only simplifies the structure of the surge protecting device and reduces the volume, but also reduces the cost.

A filter circuit includes a signal input terminal, a gas discharging tube, a signal output terminal, and a filter. The signal input terminal is configured to receive a communication signal. The gas discharging tube is coupled between the signal input terminal and a natural ground terminal. The signal output terminal is configured to provide a filtered communication signal. The filter is coupled between the signal input terminal and the signal output terminal. The filter includes a first high voltage capacitor, a second high voltage capacitor, and a main filter element. The first high voltage capacitor is coupled between the signal input terminal and an electronic ground terminal. The second high voltage capacitor is coupled between the signal output terminal and the electronic ground terminal. The main filter element is coupled between the signal input terminal and the signal output terminal.

Embodiments are directed to a transient protection circuit configured for use in a SSPC having a plurality of power channels. The transient protection circuit includes a shared transient voltage suppressor, and a shared protection line communicatively coupled to the shared transient voltage suppressor. The shared protection line is configured to be communicatively coupled to and shared by the plurality of power channels. When the shared protection line is communicatively coupled to and shared by the plurality of power channels, energy above a threshold on any one of the plurality of power channels is dissipated through the shared protection line and the shared transient voltage suppressor.

Embodiments are directed to a lightning protection circuit configured for use in a solid state power controller (SSPC) having at least one feed line and a plurality of load lines. The lightning protection circuit includes a shared transient voltage suppressor and a transient isolator communicatively coupled to the shared transient voltage suppressor. The transient isolator is configured to be communicatively coupled to the at least one feed line and the plurality of load lines. When the transient isolator is communicatively coupled to and shared by the at least one feed line and the plurality of load lines, energy above a threshold on any one of the at least one feed line and the plurality of load lines is dissipated through the shared transient voltage suppressor. A single built-in-test (BIT) circuit is provided to detect dormant failures of the shared transient voltage suppressor.

A circuit arrangement for activating a control device includes: a first switch in a main current path, via which the control device is activated; an alternative current path; and a control logic which compares a voltage present for activating the control device to a threshold voltage and opens the first switch if the threshold voltage falls below so that a higher volume of an interference current effectuated by the present negative voltage flows via the alternative current path.

Embodiments are directed to a lightning protection circuit configured for use in a solid state power controller (SSPC) having at least one feed line and a plurality of load lines. The lightning protection circuit includes a shared transient voltage suppressor and a transient isolator communicatively coupled to the shared transient voltage suppressor. The transient isolator is configured to be communicatively coupled to the at least one feed line and the plurality of load lines. When the transient isolator is communicatively coupled to and shared by the at least one feed line and the plurality of load lines, energy above a threshold on any one of the at least one feed line and the plurality of load lines is dissipated through the shared transient voltage suppressor. A single built-in-test (BIT) circuit is provided to detect dormant failures of the shared transient voltage suppressor.

Embodiments are directed to a transient protection circuit configured for use in a SSPC having a plurality of power channels. The transient protection circuit includes a shared transient voltage suppressor, and a shared protection line communicatively coupled to the shared transient voltage suppressor. The shared protection line is configured to be communicatively coupled to and shared by the plurality of power channels. When the shared protection line is communicatively coupled to and shared by the plurality of power channels, energy above a threshold on any one of the plurality of power channels is dissipated through the shared protection line and the shared transient voltage suppressor.

Disclosed in the present invention are a linkage mechanism, a base, and a surge protection device. The linkage mechanism comprises a linkage swing rod and transmission components, wherein the linkage swing rod is arranged to be rotatably connected, and is provided with a trigger portion capable of triggering a switch when rotating and at least two stress portions arranged spaced apart from each other on one side of an axis of rotation of the linkage swing rod; one transmission component is arranged corresponding to each of the stress portions; and the transmission components are arranged in such a way that any of the transmission components applies a pushing force to the stress portion to rotate the linkage swing rod, and thus the trigger portion triggers the switch. According to the surge protecting device using the linkage mechanism provided in the present invention, a module failure signal can be sent out when any surge protection module fails under the condition where only one microswitch is arranged, which not only simplifies the structure of the surge protecting device and reduces the volume, but also reduces the cost.