Feed transducer for detecting differential mode leakage current of power cable

A power cable and leakage current technology, which is applied in the direction of measuring current/voltage, measuring electricity, and measuring electrical variables, etc., can solve problems such as the influence of normal underground production, fixed detection position, and power failure of power cables, so as to reduce the risk of electric shock , improve accuracy, and enhance reliability

Inactive Publication Date: 2011-05-18
CHONGQING MAS SCI & TECH CO LTD
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Problems solved by technology

[0008] In view of the above-mentioned deficiencies in the prior art, the main purpose of the present invention is to solve the problem that the power cable must be cut off when installing the feed sensor used in the underground of the coal mine, which will affect the normal production in the underground, and overcome the problem that the current sensor device is installed. The detection position is relatively fixed and inconvenient to use, and a differential mode leakage current feed sensor with easy installation and use, strong anti-interference ability and good reliability is provided

Method used

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  • Feed transducer for detecting differential mode leakage current of power cable
  • Feed transducer for detecting differential mode leakage current of power cable

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1 As shown, a feed sensor for detecting the differential mode leakage current of the power cable includes a signal processing circuit 1 and an induction electrode 2 for collecting leakage current signals on the power cable 3, and the induction electrode 2 adopts a tightly coupled metal The material detection pressing sheet structure is also coated with a waterproof sealant layer on the outside of the detecting pressing sheet of the sensing electrode 2. The sensing electrodes 2 of the present invention are two and are respectively connected to the positive and negative poles of the differential amplifier in the signal processing circuit 1. ; During detection, press the metal detection pressing pieces of the two induction electrodes 2 tightly respectively on two separate detection points on the outer skin of the detected pow...

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Abstract

The invention provides a feed transducer for detecting differential mode leakage current of a power cable. The feed transducer comprises a signal processing circuit and two inductive electrodes, wherein, the two inductive electrodes are respectively connected with an anode and a cathode of a differential amplifier in the signal processing circuit, and the signal processing circuit converts leakage current signals acquired by the inductive electrodes and outputs feed signals. The feed transducer has the advantages of strong anti-jamming capability and higher sensitivity, and is convenient in use; and particularly metal sheets of the inductive electrodes are sealed by a special high-temperature solar waterproof sealant with resistance to crack and horizontal tear, thus ensuring that the system can be used in a mine, even being soaked in the sewage with high pollution, high content of dust and electrolyte.

Description

technical field [0001] The invention relates to a sensor detection device, especially a feed sensor used to detect differential mode leakage current on power cables in underground coal mines. The sensor is mainly used for real-time monitoring of the feed status of underground power cables, and can Prevent personnel from turning off the power supply artificially. [0002] Background technique [0003] According to the national coal mine safety regulations, high-risk mines such as coal mines must install a feed status sensor at the power feed end of the power equipment to monitor the feed status of the underground power equipment cable in real time to prevent electric shock or artificial shutdown of the power supply. [0004] At present, there are two main types of feed sensors used for underground coal mine detection in China: [0005] One type is the plug-in type destructive detection feed state sensor: this type of feed sensor is equivalent to a digital voltmeter with sig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18G01R19/00G01R19/155G01R31/00
Inventor 叶立胜温良树王建华孙申厚
Owner CHONGQING MAS SCI & TECH CO LTD
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