Remote online testing device and method for insulation data of mining electrical equipment

Abstract

The invention discloses a remote online testing device and method for insulation data of mining electrical equipment. The remote online testing device for insulation data of mining electrical equipment comprises a high-voltage direct-current power supply module, a signal acquisition module, a high-voltage measurement module and a control processing system, and the high-voltage direct-current powersupply module is electrically connected with tested equipment, the signal acquisition module and the high-voltage measurement module and supplies power to the tested equipment and the signal acquisition module. The device can carry out remote (local) insulation detection on equipment and lines at any time, exclude insulation detection blind area, and find out and forecast insulation data change reduction in advance. Electric leakage caused by poor insulation performance is reduced to the maximum extent, the effect of protecting line equipment and personal safety is effectively achieved, manual operation is replaced with mechanization, the detection accuracy is improved, the service life of the equipment is prolonged, and the influence of faults on productivity is reduced.

Description

technical field [0001] The invention belongs to the field of mine equipment detection, and in particular relates to a remote on-line test device and method for insulation data of mine electrical equipment. Background technique [0002] The harsh environment of the underground coal mining face of the coal mine has a great influence on the insulation of cables and motors, and with the improvement of coal mine production capacity and efficiency, the electromechanical equipment is becoming more and more heavy-duty. It is the long-term work in the overload state, which also causes the insulation of cables and motors to be in a state of constant change. In order to grasp the information of the insulation decline of cables and motors in advance, it is necessary to check the insulation of cables and motors often or even every day. In this case, the insulation test tool (megohmmeter is also called a shaker) is manually used to open the cavity of the explosion-proof switch or the wiri...

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Problems solved by technology

[0002] The harsh environment of the underground coal mining face of the coal mine has a great influence on the insulation of cables and motors, and with the improvement of coal mine production capacity and efficiency, the electromechanical equipment is becoming more and more heavy-duty. It is the long-term work in the overload state, which also causes the insulation of cables and motors to be in a state of constant change. In order to grasp the information of the insulation decline of cables and motors in advance, it is necessary to check the insulation of cables and motors often or even every day. In this case, the insulation test tool (megohmmeter is also called a shaker) is manually used to open the cavity of the explosion-proof switch or the wiring cavity to test the insulation data of the cable and the motor. One is to open the cavity, and the external humid air and coal dust entering the cavity will cause damage to the electrical components; the third is to cause the explosion-proof surface to lose its explosion-proof performance; the fourth is to discharge after each test, which may cause safety hazards of electrical sparks

[0003] At the same time, the traditional megohmmeter also has the following defects: the traditional hand-operated megohmmeter is a semi-mechanical internal structure composed of permanent magnets and hand-operated generators, and the measurement accuracy is not high in the insulation resistance test of electrical devices. obvious

Because it is an artificial hand-operated power generation, the power generation voltage is related to the hand-operated speed and uniformity, so the high voltage caused by it is easy to change obviously, and it is displayed by a pointer, which belongs to a non-linear dial, and there is often a large error in the reading.

And the output voltage is single

The traditional megohmmeter can only generate a single voltage, but in actual work, there are equipments of various voltage levels, and if the operator needs to test the equipment under different withstand voltage conditions, he often needs to carry multiple measuring instruments, which is very inconvenient

The traditional megohmmeter is far from meeting the actual requirements

At the same time, the measurement range is narrow (no more than 500MΩ)

In some cases, if the insulation of the equipment is abnormal, its insulation resistance value will be too large, far exceeding the measurement range of the traditional megohmmeter, so the previous megohmmeter cannot meet the requirements

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