WEET Shares Several Situations When You Choose A Low Quality Varistor
If choosing a low-quality varistor With Straight Leads or Kink Leads, there are several situations where it may fail:
The first type of degradation is manifested by an increase in leakage current and a significant decrease in the voltage sensitive voltage until it reaches zero.
The leakage current refers to the maximum direct current voltage applied at 25C or other specified temperatures
The second type of explosion, if the surge energy caused by overvoltage is too large and exceeds the maximum bearing capacity of the selected 6KV 3KA MOV Metal Oxide Varistor Surge Protection, the dipped varistor will experience ceramic explosion when suppressing overvoltage.
The third type of perforation, if the peak overvoltage is particularly high, the failure mode of the Radial Leaded Zinc Oxide Varistor 6KV3KA is mostly manifested as deterioration of each perforation (short circuit).
The solution is to connect a suitable circuit breaker or fuse in series with the dipped varistors when using it to avoid accidents caused by short circuits.
In summary, when a radial leaded varistor absorbs a surge and experiences a drop in breakdown voltage, its operating current will become too high until it burns out.
When a rupture occurs (such as cracking of the packaging layer and separation of the leads from the ceramic body), it will break the circuit and render the protection ineffective.
When this short circuit occurs, it will burn it out. When the usage environment or humidity of the epoxy varistor is too high, it will deteriorate (collapse voltage decreases), resulting in excessive working current until it burns out or short circuits.
When the operating voltage of the epoxy coated metal oxide varistors exceeds the rated working voltage, it will deteriorate (the breakdown voltage will decrease), resulting in excessive working current until it burns out or short circuits.
So, choosing high-quality products is very important, and we are exactly the partner you can trust completely.
