How to prevent electrical equipment accidents how to prevent electrical accidents

The rapid development of the industry, the scale of the industry continues to expand, and the power load continues to increase, causing the user's electrical equipment accidents to escalate. Based on years of power safety inspection work, the author analyzes the user's electrical equipment accident cases and puts forward some preventive measures for reference. I hope to help readers.

Electrical equipment FAQ

The equipment is not well maintained. For most enterprises and institutions, especially the establishment of earlier state-owned enterprises, with the extension of the use period of electrical equipment, the problem of untimely repair and replacement is more prominent. These user power distribution room equipment is outdated and has limited ability to be retrofitted. For example, a 35 kV power station in a chemical plant in Beijing is a simple station, and the 35 kV side is protected by insurance. It is installed outdoors and has poor operating conditions, but there is no capital replacement and overhaul. In this case, an accident will affect the power supply of the 35 kV system in the entire area. Other units also have problems such as transformer operation for 20-30 years and 10 kV side for SN1 or SN2 products. Although these devices are not explicitly eliminated, they should also reduce capacity usage.

The equipment is dirty. Due to the serious pollution of gas and dust in machining, smelting and chemical building materials industry, electrical equipment, especially electrical equipment installed outdoors of 35 kV and above, is easily contaminated by conductive dust or chemical gas, causing equipment to climb in small rain and fog. . Because heavy rain will wash away and dilute conductive dust or chemical gases, it will not cause damage to electrical equipment, and small rain, snow and fog will easily cause accidents. For example, the electroplating gas of a window screening factory enters the 35 kV main transformer room, and it encounters a small rain and fog weather, causing flashover.

External force is destroyed. Such accidents occur every year, such as cable cuts, car bumps, and theft of power line towers.

In addition, because some new products have no operating experience, it is easy to cause accidents, such as a 220 kV station line composite insulator string breaks all the way.

An accident caused by a small animal. Such accidents occur mostly at the turn of autumn and winter, especially those with low levels of equipment protection. As small animals such as mice, cats, snakes, etc. enter the equipment area, climbing the exposed live parts causes phase-to-phase short-circuit, resulting in equipment damage and power outages.

Mishandling accidents. Due to the application of new products and new technologies in recent years, people have neglected the operating system and relied on experience to easily cause equipment and personal accidents.