E 250 NT Compact design spindle drive with a wide area of application
- Continuously adjustable drive stroke and individual speeds for ventilation and smoke and heat extraction
- Synchronisation of max. four drives without external control unit
- Easily change the mode of operation (Solo and Syncro, master/slave) by means of DIP switch
- IQ windowdrive - intelligent drive control
- Tested as a natural smoke and heat exhaust ventilation device (SHEV) in accordance with EN 12101-2
Application Areas
- Smoke and heat extraction system and natural ventilation (24 V) for direct opening in the façade and roof area
- Inward- and outward opening windows with bottom-hung, top-hung and side-hung leaves as well as roof windows
- Can be used in the exhaust air and air inlet system
- E 250 NT for dry rooms onyl, Variant E 250 NT AB for protected outdoor area (e.g. canopy)
- Installation on wooden, PVC or metal windows
Installation situations in reference objects and videos
Spindle drive E 250 NT in an office building
The E 250 NT is a compact spindle drive with a large area of application such as smoke and heat extraction system and natural ventilation for direct opening in the façade and roof area. In addition, it can also be applied to inward opening and outward opening windows with bottom-hung, top-hung and side-hung leaves. © Jürgen Pollak / GEZE GmbH
Spindle drive E 250 NT installed in an office building
The E 250 NT is a compact spindle drive with a large area of application, such as smoke and heat extraction and natural ventilation for direct opening in façade and roof areas. In addition, it can also be installed on inward opening and outward-opening windows with bottom-hung, top-hung and side-hung leaves. © Jürgen Pollak / GEZE GmbH
Spindle drive E 250 NT
Spindle drive E 250 NT spindle drive in compact design with large area of application, mounted in a residential building © GEZE GmbH
E 250 NT
Spindle drive for particularly heavy roof window elements. Natural ventilation, smoke and heat extraction system, natural smoke and heat extraction device (NRWG). Installation on wooden, plastic or metal windows. Robust and corrosion-resistant design with built-in end position damping. Aluminium housing for the most discerning design demands. © GEZE GmbH
Technical data
| E 250 NT | |
| Dimensions | 40 x 47 mm |
| Opening speed RWA | 5.7 mm, stroke 500: 9.5 mm/s |
| Opening speed ventilation | 5 mm/s |
| Force of pressure (max.) | 750 N |
| Locking force (max.) | 2000 N |
| Compressive force | 750 N |
| Tensile force | 750 N |
| Voltage at operation | 24 V ± 25 % |
| Operating voltage | 24 V DC |
| Current consumption | 1.3 A |
| Current consumption according to area of application | Ventilation (24 V): 0.9 A; RWA (18 V): 1.0 A Stroke 500: Ventilation (24 V): 1.1 A; RWA (18 V): 1.3 A |
| Power consumption | 20 W |
| Duty rating | 30 % |
| Connector cable length | 2 m |
| Special length of connector cable | 5 m, 7.5 m |
| Min. core cross section | 0.75 mm² |
| Number of cores | 4 cores |
| Service temperature | -5 - 70 °C |
| IP rating | IP65 |
| protection rating | III |
| Syncro function | Yes |
| Additional locking available | Yes |
| Type of additional locking mechanism | Locking drive |
| Type of stroke shortening | Synchronising unit, Factory setting |
| End position cut-off extended | electronic, via internal path sensor |
| End position cut-off retracted | electronic, via path and load |
| Overload cut-off | Yes |
| Complete opening within 60 s | yes, up to 500 mm stroke |
| NSHEV tested | Yes |
| NSHEV additional information | yes, up to 500 mm stroke |
| Number synchronisation drive units | 4 |
| KNX ability | Yes |
| Bottom-hung window INWARD-opening frame installation | Yes |
| Bottom-hung window inward opening leaf installation | Yes |
| Bottom-hung window OUTWARD-opening frame installation | Yes |
| Side-hung window INWARD-opening frame installation | Yes |
| Side-hung window INWARD-opening door leaf installation | Yes |
| Side-hung window OUTWARD-opening frame installation | Yes |
| Top-hung window INWARD-opening frame installation | Yes |
| Top-hung window INWARD-opening leaf installation | Yes |
| Top-hung window OUTWARD-opening frame installation | Yes |
| OUTWARD-opening roof window | Yes |
