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Common Problems of High and Low Voltage Distribution Cabinet

Release time:

2022/12/19 20:21

What are the shortcomings of the high and low voltage distribution cabinet? Let's take a look at it. (1) The high and low voltage power distribution cabinet box has the effect of avoiding erroneous charging spacing, which promotes the opening and closing of the box door of the switch cabinet to be locked with the grounding switch, I .e. the switch cabinet door can be opened only after the grounding switch is closed. This safety accident exposed the old high-voltage switchgear mechanical equipment locking equipment is not perfect. (2) high and low voltage distribution cabinet box power inspection is a puzzle for many years of power production problems. At this stage, the foot-operated locking equipment of the fully enclosed switch cabinet cannot meet the requirements of the technical specifications. After all, in the case of power failure, the grounding switch must be covered after the machine equipment has no working voltage. However, the closed high-voltage switch cabinet is completely closed, and portable high-voltage electroscope cannot be used to perform electroscope on the system according to this operation step. Therefore, the electroscope in the form of forced opening of the switch cabinet door is selected. (3) The high-voltage direct broadcast display device with neon lamp as the indication device is widely used in the high and low voltage distribution cabinet box. After a long period of operation, it was found that the rate of blindness was high and many colored light bulbs were destroyed. In order to solve such a drawback, a neon on/off power switch is incorporated on the charging display device, which is generally eliminated, thereby temporarily suspending all high-voltage charging display device operations. In that way, the high-voltage live display device will lose the effect of detecting whether the distribution line side is live. (4) The color of the colored lights is low, especially in a bright environment, the color is washed away, and the screen clarity is poor. (5) The old-fashioned high-voltage live display device with mandatory locking of electrical equipment has an excessively simple basic principle of locking. Only the output data signals of A, B and C three-phase inductors directly form a control locking power supply circuit after half-wave rectification. In that way, when the system has a short-circuit fault and lacks phase abnormality, the equipment cannot be reliably locked due to the drift of the locking control voltage, resulting in a safety accident of the live grounding switch. (6) Therefore, the installation of neon-type high-voltage live display device is mostly plastic shell, installed in the high-voltage machine equipment room. Once the switch cabinet is short-circuited, it will cause an electric arc during operation. The continuous high-temperature electric arc may melt the plastic shell of the machine and hurt the operation or maintenance personnel. What is the solution to the problem reflected by the high and low voltage distribution cabinet? Let's take a look. For many problems existing in the old high-voltage live display device, a new live display device with high safety and reliability, long service life, durability and clear indication can fill the defects of the old high-voltage live display device. At this stage, a new type of high-voltage live-indicating electroscope equipment has been developed, which is applied with CG series product sensors supporting facilities. According to the live indication and the on-site electroscope, it can reflect whether the high-voltage machinery and equipment has the actual operating voltage and whether it has the compulsory locking function of electrical equipment.

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Basic introduction of high and low voltage cabinet for power distribution

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Common Problems of High and Low Voltage Distribution Cabinet