Feed transducer for detecting differential mode leakage current of power cable

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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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

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