The role of the high-voltage load switch
The high-voltage load switch is a function between the high-voltage circuit breaker and high-voltage disconnect switch between the electrical appliances, high-voltage load switch is often used in tandem with the high-voltage fuse; used to control the power transformer. High-voltage load switch has a simple arc extinguishing device, because it can interrupt a certain load current and overload current. But it can not break the short-circuit current, so it is generally used in series with high-voltage fuse, with the help of fuse for short-circuit protection.
High-voltage load switch and combination of electrical appliances, suitable for three-phase AC 10KV, 50HZ power system, or with complete sets of power distribution equipment and ring network switchgear, combined substations and other supporting the use of a wide range of domain construction and renovation projects, industrial and mining enterprises, high-rise buildings and public **** facilities, etc., as a ring network power supply or terminals, play a role in the distribution of electrical energy, control and protection. The technical performance of this product is in line with IEC publication 60265-1/FDIS "High voltage load switch, Part I: High voltage load switch with rated voltage above 1KV and below 52KV", IEC60420 "High voltage AC load switch-fuse combination electrical appliances", GB16926 "AC high voltage load switch-fuse combination electrical appliances", GB3804-63KV "AC high voltage load switch". AC High Voltage Load Switch".
This product has the advantages of large breaking capacity, safety and reliability, long electric life, frequent operation, compact structure, small volume, light weight, basically no need for maintenance. It has the advantages of breaking rated current and overload current. Can open the short-circuit current and prevent the equipment from running out of phase ability, the switch has a clearly visible isolation fracture, equipped with the ability to close the grounding switch electric spring mechanism, can be remote remote control.
High-voltage load switch features
1, can isolate the power supply, there are obvious disconnection points, mostly used for fixed high-voltage equipment.
2, with an arc extinguishing device and a certain closing speed, in the closing state can pass the normal operating current and the specified short circuit.
3, is strictly prohibited with a load to connect and disconnect the circuit, often used in series with high-voltage fuse. (Function close to high-voltage circuit breaker, can simplify the power distribution equipment and relay protection, reduce equipment costs)
High-voltage load switch and disconnecting switch difference
1, the load switch is able to break with load, there is a self-extinguishing function, but its breaking capacity is very small and very limited.
2, the disconnecting switch generally can not take the load breaking, the structure does not have the arc extinguishing cover, there are also able to break the load of the disconnecting switch, but the structure is different from the load switch, relatively speaking, some simple.
3, load switch and disconnecting switch, can form a clear point of disconnection, most of the circuit breaker does not have isolation function, there are a few circuit breakers with isolation function.
4, the disconnecting switch does not have the protection function, the load switch protection is generally added fuse protection, only fast break and overcurrent
5, the breaking capacity of the circuit breaker can be done in the manufacturing process is very high. Mainly rely on the addition of current transformers with secondary equipment to protect. Can have short circuit protection, overload protection, leakage protection and other functions.
Products of compact structure, small size, long life, strong closing and opening capacity, easy operation and maintenance. Vacuum switch is equipped with a spring operating mechanism, the use of motor (another manual) spring energy storage, closing mode has a solenoid closing and manual division, closing two kinds of. Isolation switch, vacuum switch, grounding switch interlocking (mechanical interlocking) to prevent misoperation.
The above editorial gives you an introduction to what exactly the high-voltage load switch, and what is the role of the high-voltage load switch. At the same time, I also provide you with some high-voltage load switch pictures. I do not know you now know what is a high-voltage load switch?