- Compact design
- Wear-free speed regulation
- Oil-free system
- Integrated locking device
- Fire-protection closures of all types
The regulation of the shutting speed is based on an eddy current system. In this system, a copper disc as well as a steel disc behind it, are brought into rotation in front of circularly arranged permanent magnets. The poles of the permanent magnets are arranged alternatingly. The resulting eddy current in the copper disc results as a braking torque on the drive shaft.
By adjusting the air gap between the copper disc and the permanent magnets, the braking power can be changed, whereby a smaller air gap corresponds with a higher braking torque, and a larger air gap leads to a reduction of the braking force. To achieve the required speed for effective operation of the eddy current system, all Kendrion shutting-speed regulators are equipped with a reduction gear with hardened gear wheels. This enables maximized service life of at least 200,000 shutting cycles to be achieved. The gate is to be opened here manually by means of a free-wheel in the deflection pulley or in the chain wheel. As the brake is decoupled in the opening direction, merely the mass of the gate as well as the counterweight are to be moved.
The gate itself is locked in position by means of a spring-supported armature disc, which is drawn against the pole surfaces of the magnet body upon actuation of the ring-formed electromagnet. This force keeps the gate in position by means of a wire cable.
Specifications and technical data
|Max. shaft loading:||750 – 1,000 N|
|Max. shutting force in wire cable:||150 – 200 N|
|Voltage, holding element:||24 V|
|Max. holding torque:||8.9 – 12.9 Nm|
|Power rating of locking device:||2.15 - 5 W +/- 10%|
|Power rating of opening aid:||-|
|Drive torque of opening aid:||-|
|Degree of protection, unit (IP):||IP 54|
|Degree of protection, connection (IP):||IP 50|
|Permitted braking power:||40 - 60 W|
|Permitted operating temperature range:||-15 C to +40°C|
|Adjustable shutting speed:||0.08 - 0.2 m/s|
Further products in the fire-protection technology sector
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