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Self-powered overcurrent protection device

A protection device and overcurrent technology, applied in the direction of emergency protection circuit devices, circuit devices, electrical components, etc., can solve the problems of poor protection effect and inability to protect power equipment

Inactive Publication Date: 2012-06-06
XIAN YUANZHENG INTELLIGENT SOFTWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the background technology, the existing current protection device is a protection mode of a fuse plus load isolating switch, which has poor protection effect and cannot effectively protect power equipment.

Method used

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  • Self-powered overcurrent protection device

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Embodiment Construction

[0011] see figure 1 , the present invention includes a protection device body 3, the protection device body 3 is connected to the circuit breaker 1 and the iron core current transformer 2, the protection device body 3 includes a panel, the panel is provided with a dial switch box terminal, and the panel is also provided with S-485 communication interface. The invention is suitable for conventional current transformers with secondary side output of 1A. The output can drive a conventional 24V or 5A monostable trip coil. No auxiliary power supply is needed, and the power is drawn from the current transformer of the primary circuit. It has optional definite time limit / inverse time limit protection function. In addition to the four standard inverse time characteristics - NI, VI, EI and LI, there are also action characteristics such as RI, HV and FR fuses. The fixed value parameter setting can be completed through the DIP dial switch, which is easy to operate, and the dial switc...

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PUM

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Abstract

The invention relates to a self-powered overcurrent protection device, which has an inverse time lag protection function and a fixed time lag protection function and can be used for obviously increasing the load protection function of a power distribution network. The self-powered overcurrent protection device comprises a protection device body, wherein the protection device body is connected with a circuit breaker and an iron-core-type current transformer and comprises a panel, and a terminal block of a dial switch box and an S-485 communication interface are arranged on the panel.

Description

1. Technical field: [0001] The invention relates to a power protection device, in particular to a self-powered overcurrent protection device. 2. Background technology: [0002] In the background technology, the existing current protection device is a protection mode of a fuse plus a load isolating switch, which has poor protection effect and cannot effectively protect electric equipment. 3. Contents of the invention: [0003] In order to solve the shortcomings in the background technology above, the present invention provides a self-powered overcurrent protection device, which has inverse time and definite time protection functions, and can significantly improve the load protection function of the distribution network. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is: [0005] A self-powered overcurrent protection device, comprising a protection device body, characterized in that: the protection device body is connect...

Claims

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Application Information

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IPC IPC(8): H02H7/22H02J13/00
CPCY04S10/20Y02E60/725Y02E60/00
Inventor 南征
Owner XIAN YUANZHENG INTELLIGENT SOFTWARE
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