How to measure high voltage capacitor? How to improve the life of high voltage capacitor?

How to measure high voltage capacitor

We all know that the voltage of the high voltage capacitor is 1KV, 2KV, 3KV and so on. Recently, xiaobian saw some friends put forward how to judge the good or bad of their 10KV high voltage capacitor. In fact, the method is very simple, and I hope it can also help the novice to solve such problems.

The quality of high voltage capacitor is mainly judged by internal breakdown! You can use a meter to measure (note that after measurement, use a wire discharge between the poles, otherwise you will suffer electric shock). There are also two other test methods as follows:

1. Use a multimeter to test the resistances at both ends. With a pointer multimeter, like most capacitors, you can see the pointer wigging from small to large. Let's see if the resistance goes back to infinity.

2. There is a series of connected in 220v ac power supply, to see whether the bulb can be lit normally. Check whether the capacitor has capacity. Initial test is normal.

How to improve high voltage capacitor life

How to improve the life of high voltage capacitor is a topic we have been concerned about, according to this topic to tell you about the life of high voltage capacitor, as long as we understand the factors that determine the life of high voltage capacitor, we can carry out targeted maintenance, so as to improve the life

1) Current capacity

Large overcurrent, long capacitor life

2) Partial discharge

This is the bottleneck of many domestic manufacturers, the larger the size, the more difficult to deal with partial discharge

However, through our long-term market practice, we found that the more local discharge is connected to 0PC, the performance and life of all aspects is better. For example, in the high-frequency pulse circuit, the local discharge is small, the ability to withstand high-frequency pulse is stronger, that is, the life is longer

3) Frequency characteristics

Frequency characteristic is often decided by capacitance of medium, that is to say, no matter whose products, as long as it is to use the same ceramic medium, the frequency of the capacitance characteristics are the same, by the same token, the use of the frequency characteristic of the better of the manufacturer of ceramic dielectric, the life of the product was a capacitor will be higher, so attention should be paid to the choice of materials in the selection of capacitance

4) Voltage level

We usually marked on the high voltage ceramic capacitors CT8G series capacitor voltage, is refers to the dc voltage, but in practical application, the military products with dc voltage, the power industry with ac voltage, tell the quality of a capacitor life or good or bad, we can judge from the voltage, first used in military industry, or civil, industrial, We should keep in mind that only for capacitors with high AC voltage levels, the life of high voltage capacitors is equivalent to indirect cost savings, so we need to understand the source of factors to solve the problem.