Taking advantages of theoretical analysis

simulation calculation and test

the thermal characteristics of tank body of a tank-type circuit breaker are studied on the basis of simplified tank body model.Calculations show that the thermal power of conductor resistance is the main thermal source of the circuit breaker

and the eddy current loss can be basically ignored.On the other hand

the heat dissipation of the hot gas through convection is the main heat dissipation way of the circuit breaker.The thermal radia-tion effect of smooth surface conductor is weak

but that of the painted surface conductor cannot be ignored.The results of simulation calculation are basically consistent with those of temperature rise test

which proves the correctness of the methods adopted in the theoretical analysis and simulation calculation.