Aluminium electrolysis bus system resistance to ground detection device and detection method thereof

Abstract

The invention discloses an aluminium electrolysis bus system resistance to ground detection device and a detection method thereof. The device comprises a keyboard input device, a partial pressure filter, an amplifier, an MCU controller and an LED display; wherein all the parts are mutually electrically connected. The detection method includes 'auxiliary short circuit line method' and 'auxiliary grounding method'. The 'auxiliary short circuit line method' includes that the aluminium electrolysis cell bus system resistance to ground detection device is connected with a thick copper wire, short time short circuit to ground of the copper wire at electrolysis cell buses at different voltage classes is utilized to measure leakage current, a short circuit point is disconnected to measure the voltage to ground of the point, and equivalent resistance to ground of system is calculated according to ohm's law; and the 'auxiliary grounding method' includes that the whole series electrolysis cell support and bus piers are measured one by one, and disqualified point is found and cleaned, so as to judge and process an insulation breakdown point. The detection device and method thereof also can be applied to other occasions with strong direct current magnetic field and high distributed capacitance.

Description

technical field [0001] The invention relates to a resistance detection device and a detection method, in particular to a resistance detection device and a detection method of an aluminum electrolytic bus system to ground. Background technique [0002] In the production of industrial aluminum electrolysis, the insulation of the electrolytic cell and the DC bus to the ground is very important. As long as there is a low-resistance grounding point in the tank system, the zero potential point of the system will drift, causing the voltage of a certain part to rise, which seriously threatens the safety of equipment and personal safety. Fire discharge or even explosion. In recent years, with the increase of the voltage of the electrolysis series, accidents such as ignition and explosion caused by insulation damage and damage to multi-functional cranes and other equipment have occurred continuously. [0003] At present, the insulation condition of the aluminum electrolytic cell and...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an aluminum electrolytic bus system ground resistance detector device, which is simple in structure, safe to use, convenient and fast; another technical problem to be solved by the present invention is to provide an aluminum The ground resistance detection method of the electrolytic bus system uses the aluminum electrolytic bus system to detect the ground resistance detector device, so as to overcome the strong DC magnetic field on the aluminum electrolytic cell, large distributed capacitance, strong electromagnetic interference, and huge size of the conductive bus in the prior art , There are many insulation points, the system structure is complicated, and the series nodes are many and complicated, so it is impossible to realize the correct detection and monitoring at all.

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