Direct current adjustable liquid resistance device with water adding device

Abstract

The invention provides a direct current adjustable liquid resistance device with a water adding device. The device comprises a cabinet body, an electrode plate, the water adding device and a liquid level detection mechanism, wherein the cabinet body consists of an electrohydraulic case body and an outlet pipe; the electrode plate consists of a fixed polar plate positioned in the electrohydraulic case body, a movable polar plate and an insulating sleeve, the insulating sleeve is wrapped on the partial vertical surface of the fixed polar plate, and the movable polar plate is positioned above the fixed polar plate; the water adding device consists of a throttle valve, an insulating water pipe and an electric controlled water valve; the insulating water pipe is connected in series with the electrohydraulic case body, the electric controlled water valve and the throttle valve sequentially; and the liquid level detection mechanism consists of a liquid level detection alarm device and a floater, and the upper part of the floater is positioned in the liquid level detection alarm device. The direct current adjustable liquid resistance device with the water adding device can be widely applied to high-voltage electrical equipment, can replace a metal electric resistance wire at the direct current end of power electronic equipment, is provided with the liquid level detection mechanism which can detect the water level of electric resistance fluid, can automatically add water into the electrohydraulic case body, and replenish the electric resistance fluid, so that the production process is simplified.

Description

technical field [0001] The invention relates to a direct current adjustable liquid resistance device with a water adding device, which belongs to the class of liquid resistance devices. Background technique [0002] Motors are indispensable electrical equipment in industrial production. For low-voltage motors, soft starters are commonly used. For high-voltage motors, soft starters are expensive, so liquid resistance starter cabinets are usually used for soft starting. The so-called liquid resistance is to insert liquid resistance in series in the stator circuit or rotor circuit of the motor. It uses an insulating water tank with a certain volume, puts a certain amount of distilled water or pure water in it, and then adds a conductive medium (such as sodium carbonate, etc.) in proportion to form The water resistance is connected in series in the circuit, and the motor can be started within a certain period of time by reducing the water resistance value from large to small. C...

AI Technical Summary

Problems solved by technology

However, in some special cases, such as the DC end of power electronic equipment, it is desired to find an adjustable load that can replace the metal resistance wire, which requires a DC liquid resistance device; in addition, the resistance liquid supplement in the above invention It is not automatically detected by the equipment, which also makes the production cumbersome

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