DE856482C - Device to bring about an uneven triggering of switching processes by reactive consumption control devices - Google Patents

Description

There are blind consumption meters known that the blind consumption in electrical Measure plants. There are also in connection with such counters, partly in uniform closed construction, partly in, separate construction, switchgear, depending on the size of the reactive consumption switching operations to improve the cos q, the total Trigger system. Suitable reactive power consumers are automatically added or switched off. For this purpose, three-phase networks are best static Capacitors in the same sizes or units have proven useful, as it is generally mainly a matter of compensating the inductive reactive current.

For the effectiveness of such automatic compensation Reactive power, d. H. the effectiveness of flash consumption meters in connection with switching contact arrangements, it is useful if the activation of the reactive consumption improving facilities, e.g. B. capacitors, with capacitive reactive current later than occurs with inductive reactive current in order to avoid so-called pumping of the system.

For this purpose an arrangement is proposed in which in the field of a permanent magnet by constricting the flow of force on a specific one Set a non-uniform inhibition of the start-up for the two possible directions of rotation is effected.

The drawing illustrates the subject matter of the invention in schematic form Depiction; it shows section i a cross section of the device according to the invention, Fig.2 is a top view.

The soft iron cross a with four poles sits on the drive shaft c of the Ferraris Systems. A horseshoe permanent magnet is located opposite the soft iron cross a H.

The invention consists in the arrangement of this soft iron cross, and although in the inclined configuration of the same, in magnetic engagement with one pole the permanent magnet b. This arrangement makes one possible for the two Direction of rotation uneven start-up clockwise or opposite to this causes. The clockwise approach takes place later than the other way around, namely at the illustrated inclination of the poles of the soft iron cross a approximately in the torque ratio i: 2. It is essential here that the permanent magnet b, as drawn, from the horizontal central axis d is shifted downwards. By this measure is a further setting of the asymmetry is possible. The size of the braking torque is by bringing the permanent magnet h closer to the ZN 'oak iron cross to a greater or lesser extent a adjustable.

Claims (1)

PATENT CLAIM: Device for causing uneven release of switching operations by reactive consumption control devices, characterized in that opposite a permanent magnet (b) a low-pole soft iron cross (a) with beveled Edges provided at a deviation from the magnetic axis of the permanent magnet is a constriction of the magnetic flux at a certain point of the magnetic path and in one direction of rotation a greater inhibition of the Start-up of the switching system than in the other direction of rotation.