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Overvoltage absorbing device

A technology of absorbing device and overvoltage, applied in circuit device, emergency protection circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, etc. , to achieve the effect of good energy gathering, inhibition of atmospheric overvoltage and reduction of residual voltage value

Inactive Publication Date: 2016-09-28
HEFEI JINTONGWEI LOW TEMPERATURE TECH CO LTD
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Problems solved by technology

[0002] At present, there are the following kinds of overvoltages in the 3-35KV power system: operating overvoltages of equipment such as circuit breakers, metal and arc grounding overvoltages generated when single-phase metals are grounded, and atmospheric overvoltages generated during lightning strikes. The maximum value of the voltage may reach more than 3.5 times the phase voltage. If such a high overvoltage acts on the power grid for several hours, it will inevitably cause cumulative damage to the insulation in the electrical equipment. wear, it will cause a major accident of phase-to-phase short circuit

Method used

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  • Overvoltage absorbing device

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Embodiment Construction

[0008] see figure 1 , a kind of overvoltage absorbing device, it comprises non-linear resistance FR1, FR2, high-voltage fuse RD, electric capacity C, resistance R, one end of described non-linear resistance FR2 is used as port, and the other end is respectively connected with one end of resistance R, one end of electric capacity C, One end of the non-linear resistor FR1 is connected, the other end of the resistor R, the other end of the capacitor C, and the other end of the non-linear resistor FR1 are respectively connected to one end of the high-voltage fuse RD, and the other end of the high-voltage fuse RD is used as the other port.

[0009] Resistor R and capacitor C form a high-frequency channel to transmit the high-frequency peak voltage generated in the system to the non-linear resistor FR2, and the non-linear resistor FR2 acts to absorb the peak overvoltage and limit the high-frequency peak voltage not to exceed a certain range, thus ensuring In order not to generate ex...

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Abstract

An overvoltage absorbing device relates to the technical field of power system overvoltage suppression. It is characterized in that it includes non-linear resistors FR1, FR2, high voltage fuse RD, capacitor C, and resistor R; one end of the non-linear resistor FR2 is used as a port, and the other end is connected to one end of the resistor R, one end of the capacitor C, and the non-linear resistor FR1 respectively. One end is connected, the other end of the resistor R, the other end of the capacitor C, and the other end of the non-linear resistor FR1 are respectively connected to one end of the high-voltage fuse RD, and the other end of the high-voltage fuse RD is used as the other port. It has a good function of energy gathering and energy absorption, and can effectively suppress atmospheric overvoltage, operating overvoltage, arc grounding overvoltage and ferromagnetic resonance overvoltage with large amplitude.

Description

technical field [0001] The invention relates to the technical field of power system overvoltage suppression, in particular to an overvoltage absorbing device. Background technique [0002] At present, there are the following kinds of overvoltages in the 3-35KV power system: operating overvoltages of equipment such as circuit breakers, metal and arc grounding overvoltages generated when single-phase metals are grounded, and atmospheric overvoltages generated during lightning strikes. The maximum value of the voltage may reach more than 3.5 times the phase voltage. If such a high overvoltage acts on the power grid for several hours, it will inevitably cause cumulative damage to the insulation in the electrical equipment. If it is worn out, it will cause a major accident of phase-to-phase short circuit. Contents of the invention [0003] The purpose of the present invention is to provide an overvoltage absorbing device with good voltage limiting effect, low residual voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/04
Inventor 武行峰
Owner HEFEI JINTONGWEI LOW TEMPERATURE TECH CO LTD
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