| 摘要 |
PCT No. PCT/DE95/01483 Sec. 371 Date May 9, 1996 Sec. 102(e) Date May 9, 1996 PCT Filed Oct. 25, 1995 PCT Pub. No. WO96/13732 PCT Pub. Date May 9, 1996A switching device including a measuring means for monitoring contact erosion, which is provided between a contact element and an associated contact support. The switching device includes an electrically insulated signal line, which is usable in individual and/or multiple contacts, is used as the measuring means, the signal line being integrated into a single monitoring circuit. In the switching device, there is arranged, between at least one of the contact elements and the associated contact support or in the contact material, an electrical conductor with insulator as the signal line, damage to or destruction of the insulator and/or the conductor being utilized to generate an external signal as an indication of the end of the service life of the contact element.
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