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Use computer storage standard ticket system, the microcomputer may bring up the wrong operation, and microcomputer using lock fill out pour brake operation is by operating personnel in computer screen system item by item, click on the graph generated after operation, microcomputer in the system diagram is always consistent with actual, in fact is the equivalent of people in the brain command microcomputer operation ticket, at the same time it also has five functions as a protection against false proof. Microcomputer electric locking and blocking associated microcomputer admittedly atresia solves the electric lock two big shortcomings, its anti false results is good also, microcomputer, however once a failure occurs, the microcomputer depend entirely on the isolation switch is not the function of anti false atresia, microcomputer that is a big drawback. Solution to the problem is the combined microcomputer electric locking and isolating switch for anti lock by mistake. This method even in atresia error protected computer failure, electrical lockout still play a role, prevent wrong operation in terms of reliability was quite high. But the defect of this method, and problems with electric lock, is when the electric locking circuit contact caused by poor contact failure, distant remove locking implementation
Electric locking in the unattended station operation reliability is not high. Breaker is due to the blocking principle in isolating switch (the) series electric circuits of several help contact, when a bad contact contact will cause the circuit failure, make normal operation cannot be achieved, especially in unattended substation, to unlock is not far away. Additionally, screw pump, when the electric circuit operation of other equipment is faulty, inspection staff for local manual operation is not locking limit, so the electric lock only works when electric operation, its blocking solid sex is not high also.
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