Should we choose dry-type or oil type low-voltage capacitors?

Low voltage capacitors, as one of the economical reactive power compensation devices, have been widely used in recent years. But when choosing capacitors, do you prefer dry capacitors or oil capacitors? Welcome to join the discussion!

Dry type capacitor vs oil type capacitor

The biggest difference between dry-type low-voltage capacitors and oil type low-voltage capacitors is the different filling media inside.

Generally speaking, capacitors filled with insulating oils such as vegetable oil and mineral oil are collectively referred to as oil capacitors; Capacitors filled with epoxy resin, modified vinyl, silicone oil, vermiculite, and inert gas as internal filling media are commonly referred to as dry capacitors.

With the passage of time, there are fewer and fewer oil electric capacitors, and dry-type oil-free low-voltage capacitors have gradually become the mainstream of the market and the preferred choice of most users.

Disadvantages of Oil Low Voltage Capacitors

The internal filling of oil and electricity containers - insulating oil, poses a certain risk of combustion and ignition, thus posing a certain risk of fire and explosion during operation.

Compared with dry-type capacitors, oil filled capacitors are often sealed with metal shells, which are prone to corrosion and have a high probability of oil leakage.

In summary, there are safety hazards in the actual operation of oil low-voltage capacitors, and the failure rate is relatively high. Therefore, the "market" is gradually abandoning them; However, high-voltage capacitors are still mainly oil based and are still recommended for use.

Advantages of dry-type power capacitors

Due to the different properties of the internal filling, dry-type oil-free capacitors will not leak oil, have corroded casings, better heat dissipation, and stronger safety and stability. In addition, the production process of dry-type power capacitors is more environmentally friendly, and they will not pollute the environment after being scrapped.

In addition, the performance of dry-type capacitors with different filling media also varies to some extent. Here, I suggest that you first choose capacitors filled with improved black glue and epoxy resin, which have relatively good quality and a better user experience.