Because the installation size and parameters of the two are different.

Explosion -proof lights are usually isolation and explosion -proof. If the ballast is installed inside the isolation cover, there is no special requirements for the ballast in theory.

However, the internal temperature and heat dissipation conditions of the isolation cover are poor, so there are still requirements for the environmental temperature indicators of the ballast, and it can generally work normally at about 50 ° C.

The so -called isolation explosion -proof means that when there is abundant gas inside and outside the isolation cover, the energy generated during the internal degeneration, short circuit, and arc pulling is not ignited during the leakage process.