The current collection performance of Mk IIIA overhead equipment judged from tests on 29 & 30 Sept 1975 (TM-ETR-70)

The report gives details of the performance of Mk IIIA overhead equipment (O/H/E) system with normal and increased values of contact tension. Performance is based on the amount of arcing seen by the R & DD arc detector. In these tests using an AMBR pantograph and a light test...