DE409765C - Circuit for the automatic triggering of an electrical switch in the event of overcurrent - Google Patents
Circuit for the automatic triggering of an electrical switch in the event of overcurrentInfo
- Publication number
- DE409765C DE409765C DEB102675D DEB0102675D DE409765C DE 409765 C DE409765 C DE 409765C DE B102675 D DEB102675 D DE B102675D DE B0102675 D DEB0102675 D DE B0102675D DE 409765 C DE409765 C DE 409765C
- Authority
- DE
- Germany
- Prior art keywords
- relays
- circuit
- overcurrent
- current
- event
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
Für die selbsttätige Uberstromauslösung elektrischer Schalter pflegte man bisher im allgemeinen Relais zu verwenden, die bei Überschreitung eines festgegebenen Strom- bzw. Leistungswertes ansprechen und die Auslösung bewirken. Die Erfindung betrifft eine besondere Schaltung, durch die es ermöglicht werden soll, die Stromstärke bzw. Leistung, bei der die Auslösung stattfindet, nachFor the automatic overcurrent release of electrical switches one used so far in to use general relays, which are activated when a specified current address or power value and cause the trip. The invention relates to a special circuit, through which it should be made possible, the current strength or power, at which the release takes place after
ίο Bedarf verschieden einzustellen. Das wird dabei in der Weise erreicht, daß neben den gewöhnlichen Auslöserelais besondere einstellbare Relais vorgesehen sind. Als einstellbares Relais kann beispielsweise ein Kontaktinstrument mit verstellbarem Kontakt- verwendet werden, das einen Hilfsstromkreis betätigt. Natürlich kommen diese besonderen Relais nur für Stromstärken bzw. Leistungen in Betracht, die unterhalb der Stromstärken bzw. Leistungen liegen, bei denen die ge- ao wohnlichen Auslöserelais ansprechen. Die letzteren wirken daher auf alle Fälle als Sicherheit für den Fall, daß eine Abschaltung durch die besonderen Relais nicht stattfindet.ίο set different requirements. That will achieved in such a way that in addition to the usual trip relay special adjustable Relays are provided. A contact instrument, for example, can be used as an adjustable relay with adjustable contact, which operates an auxiliary circuit. Of course, these special ones come Relays are only considered for currents or outputs that are below the current strengths or services where the homely trip relays respond. the the latter therefore act in all cases as a security in the event that a shutdown due to the special relay does not take place.
In der Zeichnung ist ein Ausführungsbeispiel für den Fall einer Drehstromanlage ver-The drawing shows an exemplary embodiment for the case of a three-phase system.
anschaulicht. α ist dabei der Schalter, der in an sich bekannter Weise durch Ausheben einer Sperrklinke b mittels eines Elektromagneten c ausgelöst wird. Der Stromkreis des Elektromagneten c ist in gleichfalls bekannter Weise über die Kontakte O1, a2, as dreier Überstromzeitrelais elt e2) e3 geführt, deren Stromspulen bXl b2, bs durch die Sekundärwicklung eines Stromwandlers g gespeist ίο werden. Außerdem verläuft der Stromkreis des Elektromagneten c aber auch noch über die Kontakte eines Schützschalters h, dessen Steuerstromkreis mittels der Kontakte i eines Kontaktamperemeters h betätigt werden kann. Die Stromwicklung Z dieses Kontaktamperemeters ist mit der Stromwicklung b2 des Zeitrelais e2 in Reihe geschaltet, und der feststehende Kontakt sitzt an einem Arm m, der auf einer Achse η verstellbar ist. Selbstverständlich können in den Einzelheiten der Ausführungen mancherlei Änderungen in Betracht kommen. Insbesondere ist es nicht erforderlich, daß die verschiedenen Relais über einen Stromwandler gespeist werden, vielmehr ist auch eine unmittelbare Einschaltung in die zu überwachende Leitung möglich. Es kann auch ein Kontaktamperemeter für jede Phase vorgesehen werden, jedoch wird die in dem Ausführungsbeispiel getroffene Anordnung mit einem Kontaktamperemeter nur in einer Phase den praktischen Erfordernissen für gewöhnlich genügen. illustrative. α is the switch that is triggered in a known manner by lifting a pawl b by means of an electromagnet c. The circuit of the electromagnet c is also in a known manner via the contacts O 1 , a 2 , a s of three overcurrent time relays e lt e 2) e 3 , whose current coils b Xl b 2 , b s are fed by the secondary winding of a current transformer g ίο . In addition, the circuit of the electromagnet c also runs via the contacts of a contactor switch h, the control circuit of which can be actuated by means of the contacts i of a contact ammeter h. The current winding Z of this contact ammeter is connected in series with the current winding b 2 of the timing relay e 2 , and the fixed contact sits on an arm m which is adjustable on an axis η. Of course, various changes can be considered in the details of the explanations. In particular, it is not necessary for the various relays to be fed via a current transformer; instead, direct connection to the line to be monitored is also possible. A contact ammeter can also be provided for each phase, but the arrangement made in the exemplary embodiment with a contact ammeter only in one phase will usually meet the practical requirements.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB102675D DE409765C (en) | 1921-12-11 | 1921-12-11 | Circuit for the automatic triggering of an electrical switch in the event of overcurrent |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB102675D DE409765C (en) | 1921-12-11 | 1921-12-11 | Circuit for the automatic triggering of an electrical switch in the event of overcurrent |
Publications (1)
Publication Number | Publication Date |
---|---|
DE409765C true DE409765C (en) | 1925-02-14 |
Family
ID=6990510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB102675D Expired DE409765C (en) | 1921-12-11 | 1921-12-11 | Circuit for the automatic triggering of an electrical switch in the event of overcurrent |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE409765C (en) |
-
1921
- 1921-12-11 DE DEB102675D patent/DE409765C/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE409765C (en) | Circuit for the automatic triggering of an electrical switch in the event of overcurrent | |
DE409957C (en) | Circuit of earth fault relays | |
DE514574C (en) | Safety circuit for metal vapor rectifier for quick disconnection of the alternating current side in the event of a short circuit | |
DE475537C (en) | Device for the protection of single armature converters against round fire | |
DE972665C (en) | Protective device equipped with short-circuiter for mechanical converters (contact converters) with switching reactors | |
DE611039C (en) | Reverse current magnet, on the legs of which a current and a voltage coil, which support each other with normal current direction, are attached | |
DE721555C (en) | Electromagnetic protective device for the automatic shutdown of electrical three-phase machines and systems in the event of electrical faults | |
DE698696C (en) | Motor protection device with start lock | |
DE581352C (en) | Protective device for multi-phase AC machines, especially single armature converters | |
DE606544C (en) | Distance protection device depending on the line resistance | |
DE877634C (en) | Contact converter for working on counter voltage with circuit breaker against reverse current | |
DE598543C (en) | Protection circuit | |
DE420815C (en) | Device for protecting two parallel lines in AC systems | |
DE520733C (en) | Protection circuit for single armature converter | |
DE587843C (en) | Protective circuit for parts of an AC system with a grounded zero point | |
DE633297C (en) | Protective device for multi-phase AC machines, especially single armature converters | |
DE611958C (en) | Distance-dependent protective device for three-phase networks | |
DE881381C (en) | Tube transmitter, the anode voltage of which is supplied by a rectifier system, with overcurrent protection | |
DE611679C (en) | Route protection circuit for open networks | |
DE604526C (en) | Protective relay with an excitation device that depends on a mains voltage | |
DE681387C (en) | Protective arrangement for rapid selective display of changes in impedance on electrical AC power lines or for rapid shutdown of faulty electrical AC power lines | |
DE575606C (en) | Device for switching off multi-phase lines | |
DE822692C (en) | DC overcurrent protection, especially for rectifiers with grid blocking by overcurrent relays | |
DE150208C (en) | ||
AT138238B (en) | Protective device for electrical busbars. |