What is vacuum circuit breaker used in substation
In addition, circuit breakers have a very wide range of applications in power transmission, generators, substations and other fields. For example, circuit breakers in power transmission lines are used for the opening and closing operation of medium and high voltage transmission lines to ensure the safe and reliable operation of the lines; generator circuit breakers are used for the connection between the generator and the power grid to isolate the generator from the power grid in a timely manner when the generator fails; and substation circuit breakers are used as one of the core equipment of the substation for isolating and switching the currents in the power system to prevent damage to the equipment, power grid accidents, and personnel injury.
1. Line protection: circuit breaker can perform overload protection, short circuit protection and single-phase ground fault protection, automatically cut off the fault current to prevent equipment damage and power grid accidents.
2.Connecting and disconnecting circuits: it can connect or cut off the normal running circuits according to the needs, and it is the key equipment for controlling and distributing electric energy.
3.Control and operation: In the operation adjustment of substation, circuit breaker is used to access or isolate different lines or equipments, which supports the flexible operation and maintenance of substation.
4.Carrying and cutting off short-circuit current: When short-circuit is detected, the circuit breaker can carry the short-circuit current for a certain period of time and cut off it quickly to protect the system from excessive current impact.
5. Cooperate with relay protection: in medium and high voltage systems, circuit breakers often cooperate with relay protection devices to ensure fast and accurate response to grid faults and isolate the faulty part.
ZW7-40.5 outdoor vacuum circuit breaker by Shaanxi West Power Tongzhong Electrical Co., Ltd. is a three-phase AC 50Hz, locking voltage 40.5kV outdoor high-voltage equipment. It can be used to divide and close load current, overload current and short circuit current. The product structure is reasonable, easy to maintain, can be equipped with current transformer, realize multi-variable, multi-winding, to meet the needs of metering, measurement, protection of various aspects.
It can be used in outdoor 110KV or 220kV substation, 35KV transmission line, agricultural grid power system, transmission and transformation SVG protection system.
