ELECTRICAL CONNECTION MODULE, MAIN DISTRIBUTION FRAME AND CHANGEOVER METHOD THEREOF

摘要

A main distribution frame comprises an external line module, an internal line module, a changeover module connected with the internal line module, and a changeover plug which is plugged into the internal line module and the changeover module. The changeover plug separates a jumper side termination and an equipment side termination of the internal line module, and the jumper side termination of the internal line module is electrically connected to an equipment side termination of the changeover module by the changeover plug.