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当外电源突然停电、切换或电压不稳时,对B超仪造成严重威胁甚至损坏,为此我们自制一种简易B超断电过压保护器,该保护器在电压超过限定值时,能可靠地切断电源,断电后须人为再接通才能对负载恢复供电,经多年使用,性能可靠,现介绍如图。继电器J_2的通断由可控硅T的导通和截止来控制,调整电位器W的大小,能使T按所选定的电
When the external power supply suddenly shut down, switching or voltage instability, B-meter caused serious threat or even damage, for which we made a simple B over-voltage protection device over-voltage, the voltage protection device in the limit, can Reliably cut off the power supply, people need to be reconnected to power the load recovery after power off, after years of use, reliable performance, are introduced as shown. Relay J_2 on-off by the thyristor T on and off to control the size of the potentiometer to adjust, so that T by the selected electricity