The contribution of varistor to the lightning protection industry

The main performance of the varistor is born for lightning protection. A varistor for lightning protection consists of two laminated varistor substrates. The internal electrodes of the two varistor substrates are opposite each other. The buckle electrodes are electrically connected, and the external electrodes of the two varistor bases are respectively electrically connected to the connection electrodes, the through holes are opened in the middle of the varistor base, and the trip points on the trip electrodes are arranged on the trip electrodes at the through holes. .

Alternatively, the connection end on the trip electrode is disposed in the through hole and electrically connected to the internal electrode of the varistor base body and insulated from the external electrode of the varistor base. The invention provides the tripping electrode in the middle position of the varistor base body, and when the varistor base body begins to deteriorate, the heat generated by the varistor can be transmitted to the tripping electrode at the fastest speed, and the tripping electrode is timely A tripping action is generated to reduce the disaster caused by the SPD being out of the line.

In addition to lightning protection, varistor has other functions, and this effect is also very important! That is to protect the major components. Use the varistor in parallel with the protected electrical equipment or components.

When a lightning overvoltage or a transient operating overvoltage Vs occurs in the circuit, the varistor and the protected device and components are subjected to Vs at the same time. Since the varistor responds quickly, it is quickly presented in nanosecond time. Excellent non-linear conductive characteristics. At this time, the voltage across the varistor drops rapidly, far less than Vs, so that the voltage actually applied to the protected devices and components is much lower than the overvoltage Vs, thus making the device and components Free from the impact of overvoltage. The exact protection of the major components, such as varistor damage, must be replaced immediately or it will cause more damage to the device.