Delay trip low-voltage frame switch

A frame switch and delayed tripping technology, applied in the field of power system, can solve problems such as affecting the normal operation of the company, undervoltage tripping of low-voltage frame switches, and stoppage of production in the whole field.

Inactive Publication Date: 2020-03-06
国能珠海港务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The thunderstorm season is a period of high occurrence of power grid fluctuation events caused by weather, and the low-voltage frame switch with voltage loss protection will trip when the working voltage is lower than 80% of the rated vo

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Embodiment Construction

[0015] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0016] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawi...

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Abstract

The invention discloses a delay tripping low-voltage frame switch. The frame switch comprises an under-voltage tripping loop and a time delay unit electrically connected with the under-voltage tripping loop; the time delay unit comprises a voltage detection circuit, a timer circuit, a clock control circuit and a voltage stabilizing circuit; the input end of the voltage detection circuit is electrically connected with the output end of the under-voltage tripping loop; the output end of the voltage detection circuit is electrically connected with the input end of the timer circuit; and the inputend of the clock control circuit and the input end of the voltage stabilizing circuit are electrically connected with the output end of the timer circuit. The delay unit is additionally arranged on an original under-voltage tripping loop, so that the under-voltage tripping loop has a voltage-loss delay disconnection function, power grid fluctuation can be avoided, the delay time is adjustable, and the safety performance is good.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a time-delay trip low-voltage frame switch. Background technique [0002] The thunderstorm season is a period of high occurrence of power grid fluctuation events caused by weather, and the low-voltage frame switch with voltage loss protection will trip when the working voltage is lower than 80% of the rated voltage. The general power grid fluctuation range far exceeds this value. It caused the low-voltage frame switch to trip undervoltage, which led to the stoppage of production in the whole field, seriously affecting the normal operation of the company. In order to solve this problem, it is necessary to modify the low-voltage frame switch. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a delay trip low-voltage frame switch, which has the function of delay disconnection under voltage loss, can avoid power grid...

Claims

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Application Information

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IPC IPC(8): H02H3/247H02H7/26
CPCH02H3/247H02H7/262H02H7/263
Inventor 李怀瑾武猛马林英
Owner 国能珠海港务有限公司
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