status circuit
1.After PM4354 accomplishes the bitsynchronization, QEl will read the status registers of the PM4354 to get the status of each El circuit and choose recovered clock of the specified the El circuit as the external timing source of the whole HTC-5200AN equipment. Thereby, the choice of external timing source brought by the changing from the El to QEl has been resolved.
2.This paper describes the developing status of our country and abroad of Oil Circuit Breakers (OCB), SF 6 Circuit Breakers (GCB) and Vacuum Circuit Breakers (VCB), and the developing trends of circuit breaker in the futrue. And simply describes the latest developing status of the contact materials.
5.Aiming at the problem that it is difficult to machine the high quality and super-hard materials, the characteristics of EDG (Electric Discharge Grinding) and machining status identification as well as its testing method are studied. Discharge gap voltage sampling circuit, special A/D card and servo control system are developed. The new system solves the key problem in EDG and realizes intelligent control in process.
9.In accordance with the driving characteristics of AC driving locomotive,the working status of its traction transformer is analysed.The questions that should be considered in the traction transformer design of AC driving locomotive are mentioned.These questions are the large short-circuit impedance of traction winding,higher harmonic current,over-excitation and DC magnetization caused by large variation of the network voltage,etc.Some disposal methods are given.
10.With this neoteric cooperative fault simulation system the power flows under normal operation state and the short-circuit currents under various faults can be calculated. Through the coordination of the modules in DTS with SOTS the status synchronization and event processing can be interacted, and the behavior of the protection devices in DTS and STOS can be truly reproduced.
