The key parts of the disconnector is taken as the research object

a high and low temperature test chamber is designed to study the influence degree of environmental temperature variation on the material properties of the key parts of disconnector. First

through the experimental research on such key performance index as tensile strength

end face shrinkage

0.2% non-proportional elongation strength

elastic modulus and Poisson’s ratio of such four kinds of material as 6005-T5

T2Y

ZL101

Q235

the variation of the key performance index of the 4 kinds of materials with the ambient temperature is mastered. Then

the high and low temperature test platform is set up and a contact system which can rotate continuously is designed so to study the influence of ambient temperature on the contacting pressure of contact finger

spring force

and wear resistance of the silver plating layer. The variation rate of the contacting pressure of the contact finger at 5 temperature points is basically between ±6%

and the variation rate of contact finger spring force is less than 3%

the wear amount of the silver plating layer on the contact finger decreases first and then increases with the increase of temperature. At 0 ℃

the wear amount of the contact finger of the contact is the smallest. Based on the structural characteristics of the disconnector

measures have been proposed in terms of materials

structural design

and high and low temperature adaptability tests

which lay a theoretical foundation for further improving the stability of the disconnector in high and low temperature environments.