High voltage safe cross-linked protective system of locomotive

The invention relates to a high-voltage safety linkage protect system, wherein it combines hardware and control software, uses program control; its hardware comprises key box, grounding switch and high- voltage locks on devices, which are connected via the software interface to form the high- voltage safety linkage protect system, to realize inter-lock via keys. And the invention comprises following program that: a, when reaching the high-voltage device, it uses hardware interlock and control software, to avoid lifting electric arc and closing the main breaker; b, when reaching the high-voltage device, the vehicle circuit is grounded; c, when powering the vehicle, the power connector is cut off, to improve the safety, and using the hardware feedback signal to detect the system and realize intelligent display function.