Toxic capacitor impregnation agent

Does impregnation fluid cause power capacitor failure?

The leakage of impregnation fluid causes most power capacitor failures, which is largely resulted from the compatibility problems. In the present study, the compatibility between gasket material and the most widely used impregnation fluid of benzyl toluene (M/DBT) was studied.

What type of impregnation fluid is used to test a capacitor?

The capacitor impregnation fluid selected for the test sample is M/DBT, the commercial model of which was Jarylec C101, and the main components were shown in Table 1. Table 1. The main components of M/DBT.

Are wet capacitors compatible with silicone rubber & benzyl toluene?

In the present study, to investigate the compatibility of wet capacitors systematically, silicone rubber and benzyl toluene (M/DBT), as the most widely used gasket material and the impregnation fluid of the capacitor were selected.

What happens if no impregnating agent is used?

If no impregnating agent is used, the process is catalyzed through autohydrolysis. Acetic acid and uronic acids released from hemicellulose, and formic and levulinic acids resulting from sugar degradation (Fig. 1) contribute to acidification, and can inhibit downstream biochemical processes.

What happens if a power capacitor leaks oil?

According to the statistics, 94.1% of sealing failures can lead to oil leakage in power capacitors [ 2 ]. The leakage may cause the degradation of internal insulation performance, such as partial discharge and even dielectric breakdown. In serious cases, it may cause severe accidents of fire and explosion.

How is AC impregnated?

There is a growing market for AC that have been impregnated with appropriate chemicals, organic and inorganic, these being added either by soaking impregnation or by spray impregnation, followed by drying and thermal after treatment at 150–200 °C.