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战斗在无铁芯工频感应电炉生产线上的有关人员,积极开动脑筋,寻找窍门,苦干加巧干,为工频炉的提高炉龄,简化电路,改进操作等各个方面,作出了不少贡献。不久前,在工频炉上成功地采用了交流高压真空接触器,为今后工频电炉的电路设计、安装和操作,创造了新的经验。 无铁芯工频感应电炉的起炉供电操作,过去一般是采用低压操作方式,即电炉感应加热器的电源是通过操作低压侧交流接触器来送入或切断的;并且,为了减少冲击电流对网路的影响,在初始供电之际,还必须先经过起炉电阻,然后才可转为直接供电,再切除起炉电阻。这样,就需要使用三只大电流低压交流接触器(限于接触器的电流容量,1.5吨工频炉
Fighting in the iron core frequency induction furnace production line of the relevant personnel, and actively brains, looking for tips, bitter dry plus clever, for the frequency furnace to improve furnace age, simplify the circuit, improve operations and other aspects, made a lot contribution. Not long ago, the AC high voltage vacuum contactor was successfully adopted on the power frequency furnace, which created new experiences for the design, installation and operation of the power frequency electric furnace in the future. In the past, the low-voltage operation mode was generally adopted in the operation of starting power supply of a coreless power frequency induction furnace. That is, the power of the induction heater of the electric furnace was fed or cut off by operating the low-voltage side AC contactor; and in order to reduce the impulse current pair The impact of the network, the initial power supply, you must also go through the furnace resistance, and then can be converted to direct power supply, and then remove the furnace resistance. In this way, you need to use three high-current low-voltage AC contactor (limited to the current capacity of the contactor, 1.5 ton frequency furnace