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Circuit Breaker To Ensure The Stable Operation Of The Entire Grid
Nov 02, 2017

Circuit breaker protection includes: circuit breaker failure protection, automatic reclosing, charge protection, dead zone protection, three-phase inconsistency protection and instantaneous jump. 

First, the circuit breaker protection device configuration

Generally in the double busbar, single busbar connection, the transmission line protection to send the trip command only jump at the end of a circuit breaker, reclosing naturally only coincide with this one circuit breaker, so reclosing according to the protection configuration is reasonable.

In the 3/2 wiring way to failure protection, automatic reclosing, three-phase inconsistent protection, dead zone protection and charge protection in a device, this device is known as the circuit breaker protection.

Second, the circuit breaker failure protection

Circuit breaker failure protection refers to the failure of the electrical equipment protection action issued when the trip command and the circuit breaker refused to use, the use of fault equipment protection action information and refused to break the current information circuit breaker circuit breaker failure to distinguish, Short time to cut off the same plant in the other related circuit breakers, so that the power outage is limited to a minimum, so as to ensure the stable operation of the entire power grid, to avoid the generator, transformer and other components of the serious damage and the collapse of the collapse of the accident.

Generally in the 220kV and above circuit breakers on the configuration of circuit breaker failure protection, some important 110kV circuit breakers will also configure the failure function. The following detailed analysis: 3/2 wiring circuit breaker failure protection.

 Circuit breaker power switch and power transmission is a very strict operating system and regulatory requirements, is the electrical safety of electricity operation and management of the part of the very important. Closing power transmission are to be strictly checked, carefully carefully confirmed that the accident has been truly excluded, in the closing conditions are safe with the case, in accordance with the requirements of the closing and operating procedures for power transmission closing. Power outage is also a strict requirements and operating system, not the editor said as arbitrary. All the gate when the closure of the phenomenon of flashover, are because the operator or security inspection work is not done in place, in violation of operating procedures. Moreover, the operator is a work ticket system, can not be replaced and arbitrarily assigned to others, is not irresponsible, such as an accident, the responsible person can not be exempted.

    Pull the closing of the arc is caused by the greater the load the greater the arc, and instantly cause a strong arc or detonation is because the off-line load is too large, pull the closing moment of the gap gap current injection of a strong arc. Such as three-level electric box, a pull off, theoretically safe operation from the three first pull the load, and then pull the two, and finally pull a level. Because at this time there may be a number of second-class electrical box and three-level electrical box, with multiple loads, the current is very large. Low-voltage electrical working conditions, especially the three types of electrical machinery, such as factory load multi-power, be sure to pay attention to carefully.