System for creepage trails in situ using mains independent measuring value detector

摘要

The system has a preloaded spring (1), introducing a selected stress across load free plates (7,8), and the spring force can be mechanically released across a fine threaded nut (3), with an underlying ball bearing (4). Different creepage stresses can be produced across selected load introduction plates. Mains independent per minute measurements can be carried out over a time period of up to 10 days. The switch position of the external switches (14,15), after the one time start of the measurement value detection ceases to matter. The measurement values are stored in a storage (18) across a buffer (19).