Terminal surge protector with multi-protecting mode and protecting method
A surge protector and surge protection technology, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, electrical components, etc., can solve problems that are not conducive to reflecting the real temperature, and achieve Low limit voltage, fast response effect
Active Publication Date: 2008-11-26
SEARI ELECTRIC TECH
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Problems solved by technology
[0004] The temperature sampling point of the disconnector of the above-mentioned protector is set far away from the heating element, which is not conducive to reflecting the real temperature
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[0027] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] The basic design idea of the surge protection method proposed by the present invention is as follows. The voltage limiting element, the disconnector, the discharge tube, the fast voltage limiting element and the current limiting resistor are connected as follows: the first voltage limiting element, the first disconnector, the second The two disconnectors and the second pressure-limiting element are connected in series in sequence, the first voltage-limiting element is also connected to the phase terminal L, and the second pressure-limiting element is also connected to the neutral line terminal N; from between the first disconnector and the second disconnector Lead out the terminal M, connect the discharge tube in parallel and a branch composed of a current limiting resistor and a fast voltage limiting element in series...
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This invention discloses a kind of surge protection method. The voltage-limiting element, disengaging equipment, discharge tube, quick speed voltage-limiting element and current-limiting resistance are connected in this way: first voltage-limiting element, first disengaging equipment, secondary disengaging equipment and secondary voltage-limiting element are connected in series. The first voltage-limiting element is also connected to phase line end. The secondary voltage-limiting element is also connected to neutral line end; the endpoint is drawn off between the first disengaging equipment and the secondary disengaging equipment. The discharge tube and the branch consisted the current-limiting resistance in tandem with the quick speed voltage-limiting element are connected in parallel. The discharge tube and the other end of branch are connected to ground. This invention provides a kind of low-voltage limiting and quickly responded surge protector with many protection modes. The disengaging equipment can reflect much actual temperature.
Description
technical field [0001] The invention relates to the field of surge protection, and more specifically relates to a surge protection method with multiple protection modes, low limit voltage and fast response for the terminal of a low-voltage power distribution system and a surge protector using the method. Background technique [0002] Currently, two types of protectors are usually used for the protectors used at the terminals of the low-voltage power distribution system, one is a voltage limiting type, and the other is a switch type. The former has a leakage current flowing under the continuous working voltage. This leakage current often causes unsafe phenomena such as aging of the protector. In order to reduce the leakage current, the varistor voltage of the protector is increased, and the limit voltage is also increased. This is This makes it difficult for the protector to meet the impact resistance performance requirements of the terminal equipment; the latter uses the cha...
Claims
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IPC IPC(8): H02H9/04H02H9/06
Inventor 刘明东尹天文王碧云蒋容兴
Owner SEARI ELECTRIC TECH