The breakdown voltage is the amount of electrical potential difference required to cause an insulating material to become conductive.
Humidity can decrease the breakdown voltage of an insulating material due to the presence of water molecules, which can create conductive paths and reduce the electrical resistance of the material.
As humidity increases, the breakdown voltage of an insulating material decreases. This relationship is known as the inverse power law, which states that the breakdown voltage is inversely proportional to the humidity level.
Some common insulating materials affected by humidity include plastics, rubber, and ceramics. These materials are often used in electrical equipment and can experience a decrease in breakdown voltage when exposed to high levels of humidity.
The effect of humidity on breakdown voltage can be mitigated by using materials with low water absorption, such as silicone or PTFE. Additionally, keeping the insulating material in a dry environment can also help minimize the impact of humidity on the breakdown voltage.