三极管翻译A thyristor unit is semiconductor device which acts as a switch formed by two thyristors in ant parallel. To switch on the alternating current the input signal will be on and the thyristor will switch off at first Zero Crossing voltage

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三极管翻译A thyristor unit is semiconductor device which acts as a switch formed by two thyristors in ant parallel. To switch on the alternating current the input signal will be on and the thyristor will switch off at first Zero Crossing voltage

三极管翻译A thyristor unit is semiconductor device which acts as a switch formed by two thyristors in ant parallel. To switch on the alternating current the input signal will be on and the thyristor will switch off at first Zero Crossing voltage
三极管翻译
A thyristor unit is semiconductor device which acts as a switch formed by two thyristors in ant parallel. To switch on the alternating current the input signal will be on and the thyristor will switch off at first Zero Crossing voltage with no input signal.
The benefits of thyristor units compared with electromechanically contactors are numerouses: no moving parts, no maintenance and capacity to switch very fast. Thyristors are the only solution to control transformers and special loads that change resistance with temperature and with age.

三极管翻译A thyristor unit is semiconductor device which acts as a switch formed by two thyristors in ant parallel. To switch on the alternating current the input signal will be on and the thyristor will switch off at first Zero Crossing voltage
半导体闸流管单元 是由两个并联的晶闸管形成的半导体开关器件.若要导通交流电,输入信号必须得打开；开关晶闸管将被过零无输入信号电压关断.
晶闸管单元比较机械开关的话有很多优点：没有机械部分,无需维护而且能够切换非常快.晶闸管是唯一的方法来控制变压器和特殊负载(这些负载的电阻随温度和世间的变化而变化).

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