DE741236C - Forward and reverse DC relay - Google Patents
Forward and reverse DC relayInfo
- Publication number
- DE741236C DE741236C DEL102003D DEL0102003D DE741236C DE 741236 C DE741236 C DE 741236C DE L102003 D DEL102003 D DE L102003D DE L0102003 D DEL0102003 D DE L0102003D DE 741236 C DE741236 C DE 741236C
- Authority
- DE
- Germany
- Prior art keywords
- current
- relay
- winding
- reverse
- patent specification
- 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
- H02H3/18—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 reversal of direct current
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
Vorwärts- und Rückwärts-Gleichstromrelais Die Erfindung bezieht sich auf ein empfindliches Vorwärts- und Rückwärtsgleichstromrelais mit einer Strom- und Spannungswicklung, die bei Vorwärtsstroin beide gleichsinnig wirken. Relais dieser Art werden z. B. bei parallel geschalteten Gleichstromerzeugern dazu benutzt, bei Rückstrom den gefährdeten Stromerzeuger mit Hilfe eines Schalters von der Verbindungsleitung abzutrennen. Bei Rückstroin arbeitet die Strom- gegen d i ü Spannungswicklung, so daß bei einer gewissen Höhe des Rückstromes der Anker abfällt. Bei noch weiterem Anstieg des Rückstromes wird der Anker wieder aligezogen. Bei stoßartigen Rückströmen reicht die rasch vorübergehende Abnahme der magnetischen Induktion im Magnetkern nicht aus, um den Anker abfallen zu lassen, so daß das Relais dann versagt. Ess ist bereits bekannt, parallel zur Stromspule einen vorzugsweise Ohmschen Widerstand zu schalten. der durch Vorbeileiten den Rückstromanstieg in der Stromspule verlangsamt. Dieser Parallelwiderstand hat natürlich den Nachteil, daß er auch einen Teil des Vorwärtsstromnes von der Stromspule absaugt. Wenn die Relaisempfindlichen spule absaught. Wen die Relaisempfindlichkeit nicht gering werden soll muß dieser Widerstand einen beträchtlichen Wert er-Widerstand einen beträchtlichen Wert erhalten, wodurch seine Absaugewirkung berenzt 2 ist.Forward and reverse direct current relay The invention relates to a sensitive forward and reverse direct current relay with a current and voltage winding, which both act in the same direction when there is a forward current. Relays of this type are z. B. used in parallel-connected DC generators to disconnect the endangered generator with the help of a switch from the connection line in the event of reverse current. In the case of reverse current, the current winding works against the voltage winding, so that the armature drops at a certain level of the reverse current. If the return current increases even further, the armature is pulled again. In the case of jerky return currents, the rapidly temporary decrease in the magnetic induction in the magnet core is not sufficient to cause the armature to fall off, so that the relay then fails. It is already known to connect a preferably ohmic resistor in parallel with the current coil. which slows down the reverse current rise in the current coil by passing it by. This parallel resistance naturally has the disadvantage that it also sucks part of the forward current from the current coil. When the relay sensitive coil absaught. If the relay sensitivity is not to be low, this resistance must have a considerable value, and the resistance must have a considerable value, which limits its suction effect 2.
Nach der Erfindung wird dagegen parallel zur Stromwicklung ein elektrisches Ventil, z. B. ein Trockengleichrichter, gelegt, dessen Durchlaßrichtung die Richtung des Rückstromes ist. Die Bbmessung des elektrischen Ventils entscheidet, bei welchem Rückstromanstieg das Relais wieder anspricht.According to the invention, however, an electrical one is parallel to the current winding Valve, e.g. B. a dry rectifier, placed, the direction of passage of which the direction of the return current is. The size of the electric valve decides which one Reverse current rise the relay responds again.
Die Erfindung ist in der Zeichnuing beispielsweise veranschaulicht.The invention is illustrated in the drawing, for example.
Die Stromwicklung i des Relais liegt in der Gleichstronileitung 4, die einen Verbraucher 7' speist. Im Nebenschluß zur Stromwicklung ist ein Gleichrichter 3, z. B. ein Trockengleichrichter, so angeordnet, daß er nur für Rückwärtsstroin durchlässig ist. Der Spannungspfad 5, 6 erregt die Spannungswicklung 2 so, daß sie bei Vorwärtsstrorn mit Wicklung i auf den Anker gleichsinnig wirkt. Ihre Bemessung entscheidet, ob das Relais bei sehr kleinem Vorwärts- oder Rückwärtsstrom oder schließlich bei Stromstärke null abfällt, Diese Eitistellung kann auch durch einen Vorwiderstand 7 erfolgen. Da die Netzspannung ihre Polarität nicht ändert, sind die Aniperewindungen z dieser Zusatzmickliiiig immer gleielisinniig. Das Relais zieht bei Vorwärtsstrom an, fällt z. B. bei ungefähr Nullstrom ab und zieht erst wieder bei einem Rückstrom an, welcher der größten Kurzschlußstromistärke entspricht, d. b. zum Beispiel dreifacher Nennstromstärke. Der Gleichrichter saugt den größten Teil eines Rückstromes von der Wicklung i ab.The current winding i of the relay is in DC line 4, which feeds a consumer 7 '. A rectifier is shunted to the current winding 3, e.g. B. a dry rectifier, arranged so that it is only for reverse current is permeable. The voltage path 5, 6 excites the voltage winding 2 so that they in the case of a forward current with winding i acts on the armature in the same direction. Your dimensioning decides whether the relay with very small forward or reverse current or finally drops at zero current, this position can also be achieved by a series resistor 7 take place. Since the mains voltage does not change its polarity, the anipere windings are These additional factors are always identical. The relay pulls with forward current on, z. B. decreases at approximately zero current and only pulls again at a reverse current which corresponds to the greatest short-circuit current strength, d. b. for example threefold Rated amperage. The rectifier sucks most of the return current from the winding i.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL102003D DE741236C (en) | 1940-10-05 | 1940-10-05 | Forward and reverse DC relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL102003D DE741236C (en) | 1940-10-05 | 1940-10-05 | Forward and reverse DC relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE741236C true DE741236C (en) | 1943-11-08 |
Family
ID=7289687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEL102003D Expired DE741236C (en) | 1940-10-05 | 1940-10-05 | Forward and reverse DC relay |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE741236C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE948709C (en) * | 1948-10-02 | 1956-09-13 | Siemens Ag | Device for expanding the response range of electrical devices |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1792512A (en) * | 1929-11-07 | 1931-02-17 | Bell Telephone Labor Inc | Electromagnetic device |
| GB367245A (en) * | 1931-05-04 | 1932-02-18 | Cutler Hammer Mfg Co | Improvements in or relating to the supply of a direct current electromagnet from an alternating current source |
| DE580770C (en) * | 1929-06-27 | 1933-07-15 | Friedrich Lutz | Reverse current relay device |
| DE611039C (en) * | 1933-07-02 | 1935-03-21 | Aeg | Reverse current magnet, on the legs of which a current and a voltage coil, which support each other with normal current direction, are attached |
-
1940
- 1940-10-05 DE DEL102003D patent/DE741236C/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE580770C (en) * | 1929-06-27 | 1933-07-15 | Friedrich Lutz | Reverse current relay device |
| US1792512A (en) * | 1929-11-07 | 1931-02-17 | Bell Telephone Labor Inc | Electromagnetic device |
| GB367245A (en) * | 1931-05-04 | 1932-02-18 | Cutler Hammer Mfg Co | Improvements in or relating to the supply of a direct current electromagnet from an alternating current source |
| DE611039C (en) * | 1933-07-02 | 1935-03-21 | Aeg | Reverse current magnet, on the legs of which a current and a voltage coil, which support each other with normal current direction, are attached |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE948709C (en) * | 1948-10-02 | 1956-09-13 | Siemens Ag | Device for expanding the response range of electrical devices |
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