Why do some capacitors malfunction shortly after operation?

With the progress of the times, changes in technology, and the increasing maturity of manufacturing processes for related products such as power capacitors, why is the actual service life not as good as before? Let's take a look at today's article!

The reasons why electricity is prone to malfunctions nowadays are:

1. Changes in operating environment

At present, the arrangement density of many switchgear and compensation cabinets is constantly increasing, and the overall heat dissipation conditions are poor. This situation will directly lead to an increasingly high operating environment temperature for power capacitors.

The ambient temperature will directly affect the actual service life of power capacitors. Relevant testing practices have shown that for every 7 ℃ increase, the service life of power capacitors may be halved.

2. Power grid situation

With the advancement of social demand and technology, China's power system is becoming larger and the structure of the power grid is becoming increasingly complex. After the power capacitor group is integrated into the power grid, it will be affected by harmonics, grid voltage, and rising switching frequency, and the burden will increase

In this case, capacitors are more susceptible to external factors, and the failure rate will continue to rise.

3. Unscrupulous manufacturers

At present, domestic and foreign capacitor brands are jointly seizing the Chinese market. Some manufacturers prefer to choose cheap materials in order to fight the price war, and their technology and field strength design cannot meet relevant standards.

Enterprises that choose this type of capacitor are prone to problems shortly after being put into use and cannot operate normally.

How to ensure the long lifespan of power capacitors?

1. Choose high-quality power capacitors. We have previously written methods for identifying capacitor quality, which can be used as a reference;

2. Operate under specified conditions and avoid prolonged operation under overvoltage and overcurrent conditions. If the operating temperature of the capacitor is found to be high, corresponding cooling measures should be taken immediately;

3. The capacitor room should be equipped with a certain heat dissipation device, and a certain heat dissipation distance should be maintained during capacitor installation.