Novel principle structure SPD backup protecting device
A technology of backup protection and principle, applied in the direction of protection reacting to overcurrent, emergency protection circuit device for limiting overcurrent/overvoltage, emergency protection circuit device, etc., which can solve the problem of ineffective implementation of fuses or circuit breakers Ideal and other issues, to achieve the effect of being conducive to large-scale promotion and use, avoiding difficult connection and fixing, and low manufacturing cost
Pending Publication Date: 2018-04-20
北京广荣防雷技术有限公司
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Problems solved by technology
[0005] The present invention provides a SPD backup protector with a new principle structure to solve the problem of unsatisfactory implementation effects of fuses or circuit breakers proposed in the background art
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[0018] A SPD backup protector 1 with a new principle structure, including A-phase protection modules, B-phase protection modules, and C-phase protection modules in AC 380V, and incoming lines for A-phase protection modules, B-phase protection modules, and C-phase protection modules The terminals are respectively connected to the A, B, and C three-phase circuits. The A-phase protection module includes a resistor 3, a fuse 4, and a gas discharge tube 2. The resistor 3 and the fuse 4 are connected in series, and the resistor 3 and the fuse 4 are integrated with the gas discharge tube 2 in parallel, the structure of B-phase protection module and C-phase protection module is the same as that of A-phase protection module, and the outlet terminals of A-phase protection module, B-phase protection module and C-phase protection module are connected with surge protector 5 .
[0019] It also includes a bottom case 6, an upper cover 7 is arranged above the bottom case 6, a plug-in block 8 i...
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The invention belongs to the technical field of an SPD backup protecting device, and particularly relates to a novel principle structure SPD backup protecting device. Inlet wire wiring terminals of aphase A protection module, a phase B protection module and a phase C protection model are respectively connected with a phase A circuit, a phase B circuit and a phase C circuit; the phase A protectionmodule comprises a resistor, a fuse and a gas discharging pipe; the resistor is connected in series with the fuse; the resistor and the fuse are used as a whole to be connected in parallel with the gas discharging pipe; the structures of the phase B protection module and the phase C protection module are identical to the structure of the phase A protection module. By adopting the technical scheme, different stages of gas discharging pipes are installed; the T1 (10 / 350mus) lightning experiments Iimp is less than or equal to 25 ka; in the T2 (8 / 20mus) lighting experiment, the lightning currentbeing 0 to 120 ka can pass without breaking; the broken protection can be realized within 2 seconds when 1 to 300a of power frequency current passes.
Description
technical field [0001] The invention belongs to the technical field of SPD backup protection devices, in particular to an SPD backup protector with a novel principle structure. Background technique [0002] SPD is a surge protector, which is an electronic device that provides safety protection for various electronic equipment, instruments, and communication lines. When a peak current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protection The switch can turn on the shunt in a very short time, thereby avoiding damage to other equipment in the circuit by the surge. [0003] At present, under the impact of lightning electromagnetic pulse current or power frequency fault overvoltage impact of power supply and distribution system, surge protector breakdown, short circuit, leakage and other phenomena will cause serious accidents such as tripping, short circuit and burning of power supply and distribution system. ...
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IPC IPC(8): H02H9/04H02H9/02H02H3/08H02H1/00
CPCH02H1/00H02H3/08H02H9/02H02H9/047
Inventor 李洋
Owner 北京广荣防雷技术有限公司