With a power-operated window, a motor moves the sash. This creates places where fingers or hands can be trapped. These edges are called closing edges.
What is what?
- Main closing edge: the edge of the sash that runs towards the frame when closing, usually the upper edge on a tilt window. This is where the risk of crushing is greatest.
- Secondary closing edges: the side edges of the sash. Crushing and shearing points arise between them and the frame or reveal.
When must protection be provided?
The decisive factor is above all the installation height. If the crushing and shearing points are up to 2.50 m above the floor or a standing surface, they are within reach and must be secured. Windows whose sashes are entirely higher are considered less hazardous. Whoever assembles actuator and window must carry out a risk assessment in accordance with the Machinery Directive.
Typical protective measures
- Hold-to-run control: the window only moves as long as the button is pressed
- Low closing force and slow movement in the last stretch before closing
- Safety edges or light barriers: stop the sash on contact
- Covers on the secondary closing edges
This page gives an overview and does not replace a risk assessment. Installation tips: Installing a window actuator correctly.
Read more
- Glossary: safety stay
- Ventilation control: push buttons, controllers and sensors
- 10 quality criteria for window drives
Not sure which actuator fits? Call us: 040 50694631 (Mon–Fri 8 am–5 pm) or use the actuator finder.