Partial Discharge Resistant Varnishes

2024-02-18 13:45:31

Partial Discharge Resistant Varnishes

Partial discharge resistant insulating varnishes are made by dispersing polyamideimide enamels and silicone solvents in a solvent. The solvent contains 50 to 100 wt% of gamma-butyrolactone. The insulated cable has a conductor and a partial discharge resistant insulating coating formed on the surface of the conductor. The partial discharge-resistant insulating coating film consists of a partial discharge-resistant insulating varnish.

The partial discharge is generated in such a manner that when a tiny gap exists between the insulation layer or the conductor of the wire and cable, an electric field is concentrated in that portion, causing a weak discharge. As a result of the generation of partial discharges, insulation deterioration is caused. Moreover, as the deterioration progresses, malfunction occurs.

Partial-discharge-resistant insulating varnish improves partial-discharge resistance by uniformly dispersing silica particles and preventing their agglomeration. Partial discharge-resistant insulating varnish is used to form a coating film on the conductor of insulated cables.

Advantages of partial discharge-resistant insulating varnish
Partial discharge-resistant insulating paint with improved partial discharge resistance can be obtained because the organosilicon sol is uniformly dispersed and its agglomeration is prevented.
Since the conductor is coated with the partial discharge-resistant insulating paint in which the organosilicon sol is uniformly dispersed, the insulated cable is less susceptible to partial discharge erosion, and thus an insulating coating film of silica can be uniformly formed. Evacuation. Thus, the insulated cable can be used in various inverter power supply systems to significantly extend the service life of the appliances therein.