Experimental Study on the Thermal Characteristics of Arrester and Unit
Jian-Ping Sang · Insulators and Surge Arresters · 2011
The rate unit of the metal-oxide surge arresters and the arresters has thermal equivalence is the key to the feasible and credible of the operating duty test and the power-frequency voltage withstand time characteristics test.The preliminary calculations working the maximum theoretical temperature rise △Tzmax is precondition that whether the thermal stress of the artificial pollution test should be carried out for the metal oxide porcelain porcelain-housed multi-unit metal-oxide surge arresters.The test objects are required to be heated to 120 ℃ to verify thermal equivalence and calculation △Tzmax.Based on the analysis and research on standard and test case,it is indicated that the differences and similarities between the verify thermal equivalence test and the preheating test in artificial pollution test;as well as the several problems that should pay attention during these two tests.Finally,the test data with time and temperature curve with reference value are given out.