Anti-arcing control for electric train pickup - has current monitoring control on primary current converter

TLDR: In this article, the primary transformer current is monitored by threshold level switches coupled to solid stage control circuits, which operate the protection loops which prevent damage to the drive system if the pick-up contacts start to lift off the conductors e.g. at high speed.

Abstract: The electric traction vehicle with overhead power supply has a current monitoring system in the high voltage input side of the transformer. The primary transformer current operates on threshold level switches which are coupled to solid stage control circuits. These operate the protection loops which prevent damage to the drive system if the pick-up contacts start to lift off the conductors e.g. at high speed. The system is more responsive than relay protection in the secondary circuits of the transformer.