Low-voltage side leakage protection device for underground coal mine
A leakage protection device, low-voltage side technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as lack of protection, complex structure, and incompleteness.
Pending Publication Date: 2021-06-01
江西荣欣防爆电器有限公司
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Problems solved by technology
[0003] Due to the limitation of coal mine environmental conditions, this measure is not perfect and unsatisfactory
①Currently only the leakage protection device is installed on the main power supply line, but the problem often occurs in each power supply branch circuit and various electrical equipment
②Due to the backward technology adopted, the protection device is not so sensitive, the action is slow, and there is even a phenomenon of leapfrogging
③Because the current leakage protection device uses a three-phase reactor, the structure is complex, and the quality is different, it cannot withstand the influence of the harsh environment of the underground (such as humidity, etc.), resulting in a decrease in its own insulation performance, and it cannot withstand the underground harmonics of the coal mine. The interference of waves will damage itself, so that it will not be able to protect
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[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0018] see figure 1 , the present invention provides a technical solution: a low-voltage side leakage protection device for underground coal mines, including a device housing 5, and a photoelectric isolator 1 and an electronic processor 2 are arranged inside the device housing 5;
[0019] The photoelectric isolator 1 and the electronic processor 2 are connected in series;
[0020] The inside of the device housing 5 is also provided with a low-voltage diode 3 ...
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The invention discloses a low-voltage side leakage protection device for an underground coal mine, and relates to the field of protection devices. The device comprises a device shell, and a photoelectric isolator and an electronic processor are arranged in the device shell. The photoelectric isolator and the electronic processor are connected in series; a low-voltage diode and a high-voltage diode are also arranged in the device shell, and the low-voltage diode and the high-voltage diode are connected in parallel to form a high-low voltage stabilization group; and the high-low voltage stabilization group is connected in series with the photoelectric isolator and the electronic processor. The device provided by the invention is not influenced by an underground humid environment, is not interfered by power grid harmonic waves, can immediately cut off a power supply once the insulation value of a power supply line is reduced to a certain danger degree, is sensitive and quick in response, and has a locking function; and the device can be arranged on a power supply branch to form secondary protection with a main power supply loop so that the normal operation of other power supply equipment is not influenced.
Description
technical field [0001] The invention relates to the field of protection devices, in particular to a low-voltage side leakage protection device for underground coal mines. Background technique [0002] Due to the harsh environmental conditions in coal mines, the insulation of power supply lines often drops, causing problems such as grounding of lines or direct grounding of power supplies, or electrification of electrical equipment shells. If it is light, the equipment cannot operate normally, and if it is heavy, it will cause personal injury or death, or a catastrophic accident in the mine. Therefore, adding a leakage protection device in the power supply line of the coal mine is an important safety protection measure in the process of safe production in the coal mine. [0003] Due to the limitation of coal mine environmental conditions, this measure is not perfect and unsatisfactory. ①At present, leakage protection devices are only installed on the main power supply line, ...
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Login to View More IPC IPC(8): H02H7/26
CPCH02H7/26
Inventor 苏绵朋
Owner 江西荣欣防爆电器有限公司