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Material transfer may change the effective contact distance and/or jam the contacts delaying or even preventing contact opening. These effects can be recorded in an actual relay by measuring the contact force and/or the contact voltage during each operation. Proper recording and evaluation during life tests of relays may indicate the reasons and even the mechanisms of contact failures.
Components and Packaging Technologies, IEEE Transactions on (Volume:27 , Issue: 1 )
Date of Publication: March 2004