Over-voltage limiter core body
A limiter and overvoltage technology, applied in the field of overvoltage limiter core, can solve the problems of high equipment cost, excessive structural size, high residual voltage of overvoltage limiter, etc., achieve compact structure, improve operation reliability, reduce The effect of a small footprint
Inactive Publication Date: 2015-05-06
CHINA XD ELECTRIC CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to provide a core body of an overvoltage limiter, which solves the problems of high residual voltage, excessive structural size and high equipment cost of the existing overvoltage limiter, reduces the residual voltage, reduces the footprint of the equipment, and improves the overvoltage limiter. machine operation reliability
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[0016] The present invention will be described in detail below with reference to the drawings and specific embodiments.
[0017] Reference figure 1 The limiter core is composed of a parallel gap element 2 and a resistor piece two 8 stacked in series. The limiter core is provided with a high voltage end 1 and a low voltage end 9; the parallel gap element 2 is composed of a discharge gap 4, an insulating pad 5, and a resistor piece 1. 7 series stacking composition, by connecting wire 1 3, connecting wire 2 6 and insulating pad 5, the resistance piece 7 and the discharge gap 4 are electrically connected in parallel, and are connected in series on the mechanical structure; the discharge gap 4 discharges under overvoltage , Short-circuit the resistor 7 to reduce the residual pressure at both ends of the limiter core.
[0018] The limiter core is composed of a parallel gap element 2 and a resistor plate two 8 stacked in series, the limiter core is provided with a high voltage end 1 and ...
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The invention discloses an over-voltage limiter core body. A limiter core body is composed of a parallel gap element and a resistor disc in a serial overlapping mode, the parallel gap element is composed of a discharge gap, an insulating pad and a first resistor disc in a serial overlapping mode, and the limiter core body is provided with a high-voltage end and a low-voltage end; the first resistor disc is electrically connected with the discharge gap in parallel and mechanically connected with the discharge gap in series through a connecting lead 1, a connecting lead 2 and the insulating pad; different voltage levels of over-voltage limiter core bodies are formed through the parallel gap element and a plurality of second resistor discs in a serial overlapping mode. Under over-voltage, the discharge gap discharges electricity, short circuit is occurred on the first resistor disc, and the residual pressure at each of two ends of the limiter core body is lowered; the over-voltage limiter core body realizes to lower the residual pressure of an over-voltage limiter and improve the running reliability of the limiter, protects electric equipment of an electrical power system from the damage of over-voltage, enables the limiter running reliability to be improved, and enables the safe running of the electrical power system to be guaranteed.
Description
Technical field [0001] The invention relates to an overvoltage limiter, in particular to an overvoltage limiter core. Background technique [0002] Over-voltage limiter is an important protective electrical appliance in the power system. It is used to protect electrical equipment in the power system from over-voltage damage. The characteristics of the overvoltage limiter determine the insulation of the power system and the cost of the equipment. Reducing the residual voltage of the overvoltage limiter and improving its operational reliability are very important for the insulation coordination of the power system. The method of reducing the residual voltage of the over-voltage limiter is currently used to increase the charge rate of the over-voltage limiter, increase the size of the resistor chip, and use multi-column parallel resistor chip columns. This method will reduce the reliability of the over-voltage limiter, increase the size of the structure, increase the floor area and...
Claims
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IPC IPC(8): H02H9/06
Inventor 何计谋苗发金祝嘉喜李小社
Owner CHINA XD ELECTRIC CO LTD