What is the spark-proof bulb in the high-frequency plastic welding machine?
source：Dongguan Rongsheng Gaozhou Ultrasonic Equipment Co., Ltd.
The spark-proof bulb refers to the spark protection tube. There are several types of spark protection tubes. The representative one is NL-5557. Because the circuit design of this spark protection is more sensitive, it is currently widely used. Others include 2D21, etc. Wait.