用于爆炸危险环境小的电路首先必须保证是安全火花型电路。鉴于目前的技术水平,应用于安全火花电路的功率是很低的。通过采用电路开关,在不增加点燃危险的情况下,增加电路功率是可能的。该开关可以制成对由于负载的变化引起的电流、电压变化不敏感,另一方面,一旦断路电弧发生,能立刻检测出电压的迅速变化,从而短路电 The circuit used for the explosion danger environment must first ensure that it is a safe spark-type circuit. Given the current state of the art, the power applied to safety spark circuits is very low. By using circuit switches, it is possible to increase the circuit power without increasing the ignition risk. The switch can be made for the load due to changes in current and voltage insensitive, on the other hand, once the open circuit arc occurs, can immediately detect the rapid changes in voltage to short-circuit the electricity