The difference in internal temperature of a coil when de-energized and energized. Valcor Scientific uses two grades of coils, UL B Class, which are rated to 1050F, and UL H Class, which are rated to 1800F. To calculate heat rise, use the formula below: Ambient Temperature + Heat Rise in coil = Total temperature

In a mercury displacement relay; The heat developed from the coil and contacts as a unit.

Is in direct relation to the longetivity of the generator. To find out why Multiquip units exceed the competition, view our Generator Heat Rise page.