Notbremsen

Notbremsen are safety devices designed to stop a vehicle or piece of machinery quickly in an emergency. They function as a last-resort countermeasure when normal controls fail, when a hazard is detected, or when a user directly initiates an immediate stop. Notbremsen can be manual or automatic and may operate mechanically, electrically, or hydraulically depending on the system.

In rail transport, Notbremsen are often referred to as passenger emergency brakes. They are typically activated by a reachable lever or button inside a train car. When engaged, the emergency brake triggers an immediate reduction of traction and a rapid braking sequence on all axles. Depending on the system, the action may also engage safety interlocks and automatic train protection features to stop the train at a safe location as soon as possible. After stopping, railway staff inspect the train and the Notbremsen system before it can be reset for service.

Notbremsen are also used in elevators, cranes, hoists, and various types of machinery. Elevator Notbremsen, for example, may engage if the car moves unexpectedly or if a safety device is triggered, preventing free fall. In cranes and hoists, emergency brakes may automatically lock the movement of a load to avert a dangerous descent or collision.

Maintenance and testing are essential for Notbremsen to function reliably. Regular inspections ensure that activation mechanisms, actuators, and related control systems operate correctly, and that reset procedures are clear and safe. Notbremsen are integral to safety systems, providing a rapid, autonomous means to halt equipment in potentially dangerous situations.