Detailed Explanation Of High-voltage Disconnector: Full Analysis Of Function, Operation And Maintenance
High Voltage Disconnect Switch, this switch device, plays an important role in the power system. It is mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuits", although it does not have arc extinguishing function. When the rated voltage of the isolating switch exceeds 1KV, it is upgraded to a high-voltage isolating switch. Although its working principle and structural composition are relatively simple, the high-voltage isolating switch plays an indispensable role in the daily operation of the power system, and has a profound impact on the design and construction of substations and power plants, as well as the safe and stable operation of the entire power plant. Next, we will explore the characteristics and applications of high-voltage isolating switches in depth, in order to provide you with valuable reference.
1. Overview of the characteristics of high-voltage isolating switches
High-voltage isolating switches, a key power equipment, play an indispensable role in the power system with its unique characteristics. Its core feature is that it has no arc extinguishing ability, which means that it can only perform circuit separation and combination processing when there is no load current operation. Despite this, high-voltage isolating switches can be applied to all levels of voltage and are often used to change circuit connections to achieve effective isolation between line equipment and power supplies. It should be noted that it does not have the function of interrupting the current, so before operation, it must be ensured that the line has been disconnected in advance through other equipment. In addition, the high-voltage disconnector is designed to allow long-term operation at rated current and rated voltage, but the operating temperature of the conductor connector must be strictly controlled and must not exceed 70°C. At the same time, since it does not have a special arc extinguishing device, it is strictly forbidden to perform separation and combination operations under load to ensure safe use.
2. The core function of high-voltage disconnectors
High-voltage disconnectors play a vital role in power systems. Its core function is to ensure the safe operation of high-voltage electrical appliances and devices during maintenance and overhaul, and to provide the necessary isolation effect. However, it should be clear that it does not have the ability to cut off current, input load current or disconnect short-circuit current. Therefore, it is only suitable for switching operations that do not generate strong arcs. In addition, since the high-voltage disconnector is not equipped with a special arc extinguishing device, it must be operated with extreme caution to ensure that it is only separated and combined under no-load conditions. At the same time, according to different installation environments and voltage levels, the types of high-voltage disconnectors are also different, including indoor and outdoor types, as well as single-column, double-column and three-column types. When choosing, you need to make appropriate combinations based on the actual situation.
