Difference Between High Voltage Load Switch And High Voltage Circuit Breaker

High voltage load switch is a kind of function between high voltage circuit breaker and high voltage isolation switch, high voltage load switch and high voltage fuse is usually used in series; Used to control power transformers. The high voltage load switch has a simple arc extinguishing device, so it can switch off a certain load current and overload current. However, it can not disconnect the short circuit current, so it is generally used in series with the high voltage fuse, with the fuse for short circuit protection.

Different definitions:

High voltage load switch is a kind of function between high voltage circuit breaker and high voltage isolation switch, high voltage load switch and high voltage fuse is usually used in series; Used to control power transformers. The high voltage load switch has a simple arc extinguishing device, so it can switch off a certain load current and overload current. However, it can not disconnect the short circuit current, so it is generally used in series with the high voltage fuse, with the fuse for short circuit protection.

Circuit breaker refers to a switching device that can turn off, carry and turn off the current under normal circuit conditions and turn off, carry and turn off the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their range of use. The division of high-voltage and low-voltage boundaries is fuzzy. Generally, those above 3kV are called high-voltage appliances

Different functions:

The high-voltage load switch is suitable for the three-phase AC 10KV, 50HZ power system, or with the complete set of distribution equipment and ring network switchgear, combined substation and other supporting use, widely used in the domain network construction and transformation projects, industrial and mining enterprises, high-rise buildings and public facilities, can be used as the ring network power supply or terminal, play the role of power distribution, control and protection. It has the advantages of large breaking capacity, safe and reliable, long electrical life, frequent operation, compact structure, small size, light weight, and basically no need for maintenance. With off rated current, overload current. It can break the short circuit current and prevent the equipment from running without phase. The switch has an obvious isolation fracture. It is equipped with a grounding switch electric spring mechanism with the ability to close, which can be controlled far and far.

Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they have serious overload, short circuit and undervoltage faults. Their functions are equivalent to the combination of fusing switch and over and under thermal relay. And there is generally no need to change the parts after breaking off the fault current. At present, it has been widely used.