Solving partial vacuum effects with a vented bushing insert
Flashover occurs between the exposed conductive elements of the connector to the closest ground, which is typically the bushing, as the components are separated, usually in the first ½ inch of travel. Data from field flashovers indicated a number of common factors:
- Flashovers occurred with connectors of all manufacturers.
- Flashovers occurred on unloaded or lightly loaded circuits. In the case of an insulated cap, the load current was zero.
- The rate of flashover increased with increased voltage.
- Flashover occurrences increased during cold weather.