Vigilance and train control equipment family

The EVM on-board equipment increases the overall safety of train operation.

On the one hand it decodes and displays the coded 75 Hz signal received from the track and checks that the signal aspect is obeyed; on the other hand it monitors the alertness and fitness of the driver. If the driver does not react properly to warnings, the equipment stops the train with an emergency brake application.

The equipment detects the coding of the 75 Hz track circuit through receiver coils mounted at the front of the train. It calculates speed and distance itself from the pulses of a pulse generator that signals the distance travelled. A digital cab signal informs the driver of the aspect received from the track, and an on-board horn warns if the periodic vigilance acknowledgement has been missed or if the train exceeds the permitted speed. When necessary, the equipment initiates emergency braking by opening a brake valve. The valve can only be released once the train has slowed down to the permitted speed.

In the version for the high-speed (160 km/h) TELOC-2200 speed recording system, a pressure switch monitoring the brake pipe pressure and a speed contact are also checked for increased safety. Besides the operational data (distance, speed etc.), the speed measuring and data recording system of the locomotive (TELOC-2200 or conventional) also records information on the operation of the equipment:

• automatic activation of the emergency brake,
• vigilance prompts and their acknowledgement,
• the target speed evaluated on the track-to-train information channel,
• operating mode (running/shunting).

Advantages

• Low energy consumption
• Software-free design
• Easy adaptation to different types of traction units
• Easy servicing

Types

• EVM 120, 120 km/h, 800/min
• EVM 120, 150 km/h, 800/min
• EVM 120, TELOC 2200

References

Around 700 units in operation

• on the network of Hungarian State Railways (MÁV)
• on the network of Győr–Sopron–Ebenfurt Railway (GySEV)
• on the network of Austrian Federal Railways (ÖBB)
• on the Romanian railways
• on private railways