Provision of visual indication along with push button switch on WAG-7 electric locomotives having gear ratios 18:64 / 16:65 for alerting of driver not to exceed traction motor current 970A/890A while starting on bridges" *as per RDSO. Hence this indication will be found only in some WAG7 locos having specific gear ratios. Some reference to this device is found in this speed certificate. (Khalid Kagzi)