Coupling capacitors

High-quality, compact PD-free capacitors for various applications.

Basically, we manufacture our coupling capacitors on an easily moveable trolley – a base plate with wheels – and a top electrode that is appropriate for the rated voltage level.

However, we can easily adapt to the requirements – both the dimensions and also the electrical properties. As for the lifetime, our first series of coupling capacitors from the 1990s are still working PD-free on rated voltage all over the world. Therefore, with our latest design, we offer capacitors that – operating on rated voltage – can last for decades. The long expected lifetime is due to the properly and carefully designed electrical stress inside the capacitor. Although we have standardized products on stock – 50, 100 and 200kV, 100pF or 1nF capacitors- we can design our capacitors between 5kV and 1800kV easily and in a short time. Many years of experience lead to our latest design. Firstly, these coupling capacitors are compact and easy-to-handle. Secondly, to avoid any oil leakage we use a new type of volume compensator to make sure that our coupling capacitors can be used up to 55 °C. Thirdly, and most importantly the PD level is below 1pC, making these capacitors the perfect choice for PD test systems, where really low PD level is required. At this time, ISOFARAD coupling capacitors are present all around the world in high voltage laboratories and test systems. They are usually used in PD measurements or as voltage dividers. The dividing ratio can be adjusted to the requirements. In addition, we offer measuring impedance for the capacitors – if requested. Therefore, if you are in need of high voltage capacitors for your project, feel free to contact us. We are happy to help you in finding the best solution. In conclusion, if you are looking for a product that has not only excellent electrical properties but also a long life time, ISOFARAD is the right choice.