DE402311C - Circuit for self-switch with remote control - Google Patents

Description

GERMAN EMPIRE

ISSUED
ON SEPTEMBER 20, 1924

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21c GROUP

(S 56982 vm \ 2ic *)

Siemens-Schuckertwerke G. m. B. H. in Siemensstadt b. Berlin*).

Circuit for self-switch with remote control.

Patented in the German Empire on July 12, 1921.

It is known to provide self-circuit breakers with trip-free to prevent that the switch can be switched on again under a short circuit or held. the Release was achieved mechanically.

This type of triggering is very cumbersome when switching off automatically with remote control and one has therefore switched to actuating the trip-free release electrically. This mostly happens in a way that the excitation circuit of the switch-on device

*) The patent seeker stated as the inventor:

Carl Vogel in Berlin-Schöneberg.

, Overcurrent is interrupted. The interruption is carried out by a special relay, that is fed from a special power source and through a second relay that is under the action of the main stream, is controlled. In the event of an overcurrent, the excitation circuit of the auxiliary relay is closed, which controls the excitation circuit of the Switch-on solenoid interrupts. The circuit is now significantly simplified if according to the invention, the excitation coil of the interruption relay in parallel with the self-opening switch arranges. The excitation coil, which is short-circuited by the switch when the switch is closed is, as soon as the switch opens, receives voltage and then interrupts the excitation circuit of the closing coil.

A. Embodiment of the invention is shown in the drawing. In the power line ζ is the self- switch s with the closing coil e, whose circuit for inserting the switch through the switch d, z. B. a push button is closed. According to) the invention, the bridge of a relay r is inserted into the circuit of the closing coil, the excitation coil ρ of which is placed in parallel with the self-opening switch with the addition of a series resistor w. When there is no current and normal current in the line 2, the bridge b of the relay r is on the two contacts c and k of the line of the closing coil e. If a short circuit occurs, e.g. B, earth fault at point P of the line, the switch s opens, the coil ρ of the relay r receives voltage and the switch-on circuit is interrupted. As long as the short circuit continues, switch s cannot be closed even when switch d is closed, since the switching circuit at relay r remains interrupted.

Under certain circumstances it can be useful * to let the relay r still act on a circuit) that has a signaling device, e.g. B. contains an electric bell g or an electric lamp, as is also shown in the drawing.

When the short circuit has been eliminated, the normal current flowing through the coil ρ is no longer sufficient to hold the bridge h. The same drops out and restores the control circuit for the switch-on magnet e . At the same time, the circuit of the signaling device is interrupted and the cessation of the signal indicates that the switch can be closed again by means of the push button d.

Claims (1)

Patent claim: Circuit for self-opening switch with remote control, in which the excitation circuit the switch-on device is interrupted in the event of an overcurrent, characterized in that that in the circuit of the closing coil is the bridge of an interrupt relay, its excitation coil connected in parallel to the switch.