In this paper, the design of a degradation test for a
After the mechanical durability test, the magnetic magnetic contactor is presented and statistical analyses of
the degradation test results are provided. The degradation
† Corresponding Author: LS Industrial Systems, Co., Ltd., Korea
(hsryu@lsis.biz) indices of MCs are vibration and sound. The magnetic
* LS Industrial Systems, Co., Ltd., Korea contactor used for the degradation test is the rating of 440
** Dept. of Electrical and Electronic Engineering, Chungbuk National V-9 A and the coil rating is 220 V. In order to operate the
University, Korea
Received 30 January 2007 ; Accepted 8 May 2007 magnetic contactor, the programmable logic controller