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Circuit Breaker To Ensure The Safe Production Of Power Systems
Jul 21, 2017

Circuit breaker has a relatively important role in the whole power system, its role is to achieve the equipment control and protection functions, mainly in its control loop and protection, automatic devices and other interrelated.

In the operation of the circuit breaker closing, if the green light flashing light is not lit or the traffic lights are off, then the circuit breaker auxiliary contact conversion abnormalities, or in the operation of the opening, there is a red light, green light is not bright or traffic lights Are extinguished when also shows the phenomenon of abnormal.

When the circuit breaker auxiliary contact conversion anomalies, the first thing to do is to report timely scheduling, view the background monitoring system signal, focusing on the situation of circuit breaker displacement, current, active is normal, if necessary, with the dispatch monitoring center , And then to the scene to check the secondary circuit of the circuit breaker and the mechanism, in the troubleshooting does belong to the circuit breaker auxiliary node problem, in order to avoid the switch of the normal division, must take the necessary measures. And timely report to the maintenance team, to be handled after the power outage.

On the circuit breaker running, issued a control loop disconnection signal, causing this phenomenon for many reasons, must be based on the background machine-related information and on-site inspection equipment to analyze the situation, the power circuit is normal, the protection of the secondary circuit Normal, switch the storage capacity is normal, switch SF6 gas pressure and other abnormalities. After the operation of the identified problems to take the necessary control measures, notify the relevant maintenance personnel to further investigation and handling, trying to equipment failure on the other equipment to minimize the impact of the grid.

Circuit breaker control circuit of the basic principles, starting from the most basic circuit, and gradually joined the anti-jump circuit and blocking circuit, and the circuit to do some improvement. Of course, the circuit diagram given in this paper is only the most basic, used to explain its basic principles, the practical application of the circuit is much more complex.

Once the equipment is used directly for the production, transmission, distribution of electrical equipment, including generators, power transformers, circuit breakers, disconnectors, bus, power cables and transmission lines, is the main body of the power system. Secondary equipment is used for power systems and primary equipment to monitor, control, regulation and protection of low-voltage electrical equipment, including measuring instruments, communications equipment. The interconnected circuits between secondary devices are collectively referred to as secondary circuits, which are an integral part of ensuring the safe production of power systems, economical operation and reliable power supply.

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 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.

1. With the over-current, short-circuit automatic trip function, with degaussing arc extinguishing device, can be used to connect, cut off the high current; air switch: a circuit breaker, its arc extinguishing device exposed to the air, Medium environment can be completed to eliminate the arc, such electrical appliances are generally used for low-voltage circuit. 1. Voltage level difference: General air switch for the voltage level of 500V or less, and the circuit breaker can usually be applied to more than 220V voltage level.

2. The ability to interrupt the current is different: the general circuit breaker can withstand the load and short circuit current greater.

3. The difference between the arc medium and the way: circuit breaker arc medium and the way not only air circuit breakers, as well as vacuum circuit breakers, multi-oil circuit breakers, less oil circuit breakers, sulfur hexafluoride circuit breakers and so on.

4. The difference between ancillary equipment: generally relative to the air in terms of the circuit breaker measurement, logic and the implementation of the part of the organization of the equipment more complex.