Comparison of the current collection performance of MK III A & MK I overhead systems using standard AMBR & GEC P7 pantographs - test Jan 1976 (TM-ETR-080)

Reports have been made to the Overhead Equipment Working Party from time to time that current collection with the MK III A system is not good at present line speeds and that excessive arcing is observed, much worse than for the MK I system. It is also alleged that arc...