System Line

AC Solenoids



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About the system line

The use of AC solenoids requires to take into account their essential design and electromechanical features. In normal operation an AC solenoid achieves higher switching power than a DC solenoid, as the switching times are significantly shorter. Furthermore, it is smaller than a DC solenoid with the same performance however damping is not possible and the fast acceleration causes a hard impact and a loud impact noise which cannot be avoided.

As opposed to a DC solenoid with constant power consumption during the complete stroke travel the power consumption of an AC solenoid varies. Therefore, the acceleration must NOT be impeded once the device has been switched on as the highest power consumption (breakaway starting current) and heating occurs in the stroke starting position. During the stroke travel this value decreases towards the end position, the holding current. The latter one is calculated in such a way that the magnet can be energized infinitely with a 100% duty cycle coil design.

Consequently, the solenoids of this type generally have an ascending force characteristic. The service life of an AC solenoid cannot be indicated by a certain number of switching operations as too many factors are  involved. This is only possible on a case-by-case basis if the installation and operating conditions are known in detail. Generally, it should be ensured that at least 2/3 of the magnetic force are used to prevent early wear. The installation position should be as vertical as possible to avoid tilted force transfer and premature wear.

The solenoid types of the system line belong to the group of direct-acting solenoids, i.e. the stroke movement from the maximum stroke to the stroke end is accomplished by electromagnetic force. The reset must be achieved by external forces. The force transfer with pushing solenoids has to be effected by anti magnetic bolts. The magnetic forces indicated are reached at 90% of the nominal voltage  and in warmed-up condition. The values of the duty cycles apply for nominal voltage, warmed-up condition and load with 70% of the magnetic force of the device.

The products are manufactured and tested according to DIN VDE 0580/07.2000.
Nominal voltage: 230 Volt, 50 Hz
Duty cycle: 100%
Thermal class: B
Protection class: acc. IEC 60529
Design subject to change