1Comprehensive Analysis of common failures from the substationAbstract: The main circuit breaker as a power transmission equipment, switching equipment, whether or not it is related to the normal operation of the security of the entire power grid stable and reliable operation in recent years, with the development of technology, power transmission station equipment automation is increasing. Circuit breaker operation and maintenance and repair personnel is also a higher level of technical requirements. The authors concluded over the years through work experience, combined with actual cases encountered in the work, giving top priority to the circuit breaker may malfunction and cause of the malfunction, determine the methods and solutions are described in detail. Keywords: integrated automation, substation, circuit breaker, failure Abstract: the circuit breaker as the main switch equipment transformation equipment, its normal operation or not relates to the whole of the safe and stable and reliable operation of the power grid. In 2recent years, with the development of science and technology, automation level transformation station equipment is getting higher and higher. The operation and maintenance of circuit breaker repair and maintenance personnel also put forward higher technical level requirements. The author summarizes the work experience, combining over real cases work across to breaker may appear, acquire the faults and fault reasons, judging methods and measures for a detailed explanation. Key word: integrated automation substation breaker failure With advances in technology, social development, and reasonable network structure stronger, higher and higher levels of substation automation, for the calm after a failure to respond decisively to quickly control the scope of failure to eliminate the root causes of failure, so that substation electrical equipment safety , reliable, economic operation then, since I have now integrated substation circuit breaker for the following brief analysis of the frequently asked questions: A failure analysis of circuit-breaker closing Circuit 3Breaker failure is often an accident occurs, one on duty if not handled properly, often delayed transmission time, so should be fast depending on the operating process anomalies, initially to determine the scope and causes of failure to carry out the necessary troubleshooting timely resumption of electricity supply. 1.1 Circuit Breaker failure causes 1.1.1 remote or local control switch and mode of operation does not correspond to 1.1.2 energy storage (power switch on the air in the sub-gate position switch or poor contact, closing the power circuit barrier, 1.1.3 Control power switch in the sub-gate location or poor contact, the control circuit barrier (control failure 1.1.4 closing operation circuit elements (auxiliary switch is bad or not connected, (control failure 1.1.5 closing coil damage (control failure 1.1.6 breaker catching within the body, 1.1.7 no energy storage or energy storage spring mechanism not in place, (control failure) 1.1.8 mechanical catching 1.2 General processing steps 1.2.1 First, the switch failure, we found no close circuit breaker, control power should be disconnected 4immediately to prevent damage to the closing coil, 1.2.2 ascertain whether it is operating properly; 1.2.3 Check the switch on the power, control power supply is normal, the DC voltage is within the normal range, the spring energy storage situation, the red, green indicates the situation of human adjustment switch on power transmission, 1.2.4 above normal, according to the closing or core action, identify the scope of failure (electrical circuits and mechanical circuit, 1.2.5 For a short time to identify and address their own failure to take appropriate measures to deal with, immediately switch on power transmission, 1.2.6 can not handle the problem for the type of failure should be identified, timely reporting and scheduling parent by maintenance personnel for processing. 2 circuit breaker tripping failure of treatment Circuit breaker tripping failure, in the event of an accident will result in loss of bus voltage (grade trip to the accident to expand, and even system collapse, and 5because relying on a power back-up protection tripping, which expanded the scope of the accident and failure to extend the time for removal seriously undermined the stability of the system, increased the extent of damage to equipment. Circuit breaker tripping failure points the following situations: 2.1 Running the circuit breaker tripping accident protection or protection action, but refused to jump breaker: (consequences) 2.1.1 grade trip, 2.1.2 to expand the scope of the accident, 2.1.3 The removal of prolonged downtime, 2.1.4 damage to system stability, 2.1.5 to increase the extent of damage to the equipment. Links to free download http:/eng.hi138.com2.2 monitoring in abnormal operation, the c