DE454501C - Protective device against opening a live disconnector - Google Patents

Description

Isolating switches are designed to isolate powerless power packs from voltage. They are also sized accordingly. If they are switched off under power, ss suffer they cause severe damage, which in certain circumstances significantly reduces the operation of the system suffers. Since an inserted disconnector cannot be seen whether it is de-energized or carrying current, it is fine ίο many suggestions have been made around this ascertain. You already have the disconnector with a mechanical self-switch coupled or mechanical and electrical interlocks provided between the two, so that when the isolating switch is opened, the circuit breaker must also open and thereby the circuit breaker switches off the line.

According to the invention, this locking takes place in that during or before opening of the circuit breaker a plug is removed that has a known contact opens in the line of a release located on the associated circuit breaker or closes so that the trigger opens the circuit breaker.

In the figures, exemplary embodiments according to the invention are shown.

Fig. Ι shows a circuit diagram for quiescent current, Fig. 2 is a side view of the Handle of the disconnector, Fig. 3 a circuit diagram, for operating current and Fig. 4 is a side view of a handle in this circuit.

According to Fig. 1, a circuit breaker 12 connected in series with a circuit breaker 11 is located in the cable run. When the circuit breaker 11 is opened by pulling the handle 13, the plug 14 is in the closed circuit. 15 open, in which z. B. the voltage drop release 16 of the circuit breaker? 12 lies. This allows the spring \ y to open the automatic switch. The circuit breaker 12 designed for this takes over the interruption of the line.

In Fig. 2, the plug 18 shown in solid lines z. B. to the Switching lever 19 of the disconnector 11 is placed and is pulled out when it is moved. This is with cutting knives that are still after stay in contact with the mating contacts for a certain switching path is permissible. at Isolation switches with pressure contacts is the connector 2-1, shown in dashed lines, around the Handle 20 of the shift lever 19 put around. He can cover the whole handle, so that it must be removed before switching the circuit breaker in order to reach the hand lever 20.

Fig. 3 shows a circuit diagram for operating current. When opening the circuit breaker 11, a contact 22 is closed, so that the release 23 of the self-switch 12 voltage is applied, the pawl 24 triggers, so that the spring 17 the automatic switch can open.

The Fig. 4 corresponding to Fig. 2 again shows the attachment of the plug contacts the gear lever 19.

Whether the arrangement with a simple disconnector or a switch disconnector is applied is irrelevant to the invention.

Claims (3)

Patent claims: 1. Protection device against the opening of an energized disconnector, characterized in that a plug is coupled to the isolating switch in such a way that it is at or before the Opening the circuit breaker is removed and thereby a known contact in the line of a release located on the associated circuit breaker opens or closes, so that the The trigger opens the self-switch. 2. Protection device according to claim 1, characterized in that the plug reaches around the handle of the circuit breaker and must first be removed to open the circuit breaker. 3. Protection device according to claim 1 and 2, characterized in that it is also used with switch disconnectors. *) The patent seeker stated as the inventor: JPipl.-Ing. Kurt Büchner in Berlin-Grunewald. 1 sheet of drawings. BERMN. PRINTED IN THE REICH PRINTING COMPANY.