DE856760C - Protection device against uneven loading, overloading and underloading for multi-phase electrical distribution systems - Google Patents

Protection device against uneven loading, overloading and underloading for multi-phase electrical distribution systems

Info

Publication number
DE856760C
DE856760C DEC488A DEC0000488A DE856760C DE 856760 C DE856760 C DE 856760C DE C488 A DEC488 A DE C488A DE C0000488 A DEC0000488 A DE C0000488A DE 856760 C DE856760 C DE 856760C
Authority
DE
Germany
Prior art keywords
elements
overloading
underloading
electrical distribution
distribution systems
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
Application number
DEC488A
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chamberlain and Hookham Ltd
Original Assignee
Chamberlain and Hookham Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chamberlain and Hookham Ltd filed Critical Chamberlain and Hookham Ltd
Application granted granted Critical
Publication of DE856760C publication Critical patent/DE856760C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26Emergency 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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32Emergency 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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34Emergency 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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Description

Der Gegenstand der Erfindung ist eine. verbesserte Schutzvorrichtung für mehrphasige elektrische Verteilungssysteme und/oder Einrichtungen; es handelt sich dabei um eine Vorrichtung, welche auf die Wärmewirkung bei ungleichmäßiger Stromverteilung auf Unterbelastung oder Überbelastung anspricht.The subject matter of the invention is. improved protection device for multi-phase electrical distribution systems and / or facilities; it deals This is a device that acts on the heat in the case of uneven Power distribution responds to underload or overload.

Gemäß der Erfindung besteht die Schutzvorrichtung aus einer Kombination mehrerer temperaturempfindlicher Elemente, einem durchgehenden beweglichen Verbindungsglied, mit welchem jeweils ein Ende der genannten Elemente verbunden ist, und mehreren Schaltgliedern, mit denen jeweils die anderen Enden der genannten Elemente verbunden sind, mit Ausnahme eines Elementes, dessen mit dem Verbindungsglied nicht verbundenes Ende fest angeordnet ist.According to the invention, the protective device consists of a combination several temperature-sensitive elements, a continuous movable link, with each one end of the named elements is connected, and several Switching elements with which the other ends of said elements are connected are, with the exception of one element, which is not connected to the connecting link End is firmly arranged.

In den Abbildungen zeigt Fig. i ein Systemschaltbild einer Ausführungsform für ein Dreiphasenverteilungssystem, Fig. 2 eine perspektivische Ansicht einer vorteilhaften Ausführungsform der Vorrichtung gemäß dem Schaltbild in Fig. i.In the figures, FIG. 1 shows a system circuit diagram of an embodiment for a three-phase distribution system, Fig. 2 is a perspective view of an advantageous one Embodiment of the device according to the circuit diagram in Fig. I.

Bei der dargestelltenAusführungsformdesGegenstandes der Erfindung sind vier temperaturempfindliche Elemente a, b, c und d vorgesehen. Dazu können beispielsweise Bimetallstreifen verwendet werden, die zu Spiralen aufgewunden sind oder eine andere geeignete Form haben können. Alle Elemente a bis d sind mit einem Ende mit dem gemeinsamen schwenkbaren oder verschiebbaren stabförmigen Teil e verbunden. Das andere Ende jedes der Elemente a und c ist mit einem schwenk- oder verschiebbaren Arm f verbunden, der ein Kontaktstück g trägt, das durch den Arm zwischen zwei festen Kontaktstücken h bewegt wird. Das andere Ende des Elementes b ist festgelegt; das andere Ende des Elementes d ist mit einem schwenk- oder verschiebbaren Arm i verbunden, der ein Kontaktstück j trägt, das gegenüber einem einzelnen festen einstellbaren Kontaktstück k beweglich ist. Die Erwärmung der Elemente a, b und c wird durch daran angrenzend angeordnete Heizspulen n, die mit je einer der drei Phasen des Verteilungssystems verbunden sind, bewirkt. ,Das Element d wird lediglich, zusammen mit den drei anderen Elementen, von den Temperaturänderungen der Umgebung beeinflußt. Durch geeignete Schirme o wird verhindert, daß die Wärme der Spülen n auf andere als die jeder Spule zugeordneten Elemente einwirkt.In the illustrated embodiment of the subject invention, four temperature sensitive elements a, b, c and d are provided. For this purpose, bimetal strips can be used, for example, which are wound into spirals or can have another suitable shape. All elements a to d are connected at one end to the common pivotable or displaceable rod-shaped part e. The other end of each of the elements a and c is connected to a pivotable or displaceable arm f which carries a contact piece g which is moved by the arm between two fixed contact pieces h. The other end of element b is fixed; the other end of the element d is connected to a pivotable or displaceable arm i which carries a contact piece j which is movable with respect to a single fixed adjustable contact piece k. The elements a, b and c are heated by adjacent heating coils n which are each connected to one of the three phases of the distribution system. The element d is only influenced, together with the three other elements, by the temperature changes of the environment. Suitable shields o prevent the heat of the sinks n from acting on elements other than those associated with each coil.

Die Arbeitsweise der Vorrichtung ist folgende: Ein fehlerhaftes anomales Zu- oder Abnehmen des Stromes in der dem Element b, dessen eines Ende festliegt, zugeordneten Phase hat zur Folge, daß durch dieses Element der Stab c aus seiner normalen Lage gebracht wird. Dadurch werden die beiden oberen Schaltkontakte g, 7c geschlossen, die den beiden Elementen a und c zugeordnet sind. Ein Fehler in einer der beiden anderen Phasen bewirkt die Schließung eines der beiden Kontaktpaare g, 7a, die jedem der Elemente a und c zugeordnet sind, und zwar je nach Ausführung der Elemente z. B. bei Überlastung das untere Kontaktpaar und bei Unterbelastung das obere Kontaktpaar g, h des Elementes der anomal belasteten Phase. Eine Überbelastung aller drei Phasen schließt nur den Schalterkontakt j, k, der zu den Elementen d gehört, da die Bewegung der Schaltglieder f in diesem Falle durch die Bewegung des Elementes b aufgehoben wird. Änderungen der Raumtemperatur dagegen haben keinen Einfluß auf die Stellung der Kontakte Bund j.The operation of the device is as follows: An erroneous abnormal increase or decrease in the current in the phase associated with element b, one end of which is fixed, results in rod c being brought out of its normal position by this element. As a result, the two upper switching contacts g, 7c, which are assigned to the two elements a and c, are closed. A fault in one of the other two phases causes the closure of one of the two pairs of contacts g, 7a, which are assigned to each of the elements a and c, depending on the design of the elements z. B. in the event of overload the lower pair of contacts and in the event of underload the upper pair of contacts g, h of the element of the abnormally loaded phase. Overloading all three phases only closes the switch contact j, k, which belongs to the elements d , since the movement of the switching elements f in this case is canceled by the movement of the element b. Changes in the room temperature, on the other hand, have no effect on the position of the contacts Bund j.

Der Gegenstand der Erfindung ergibt eine Schutzvorrichtung von sehr einfacher Form. Die Erfindung ist indessen nicht nur bei Dreiphasensystemen anwendbar, sondern in entsprechender Anpassung auch bei Systemen anderer Phasenzahl.The object of the invention provides a protection device of very good simple form. However, the invention is not only applicable to three-phase systems, but also in the case of systems with a different number of phases with appropriate adaptation.

Claims (2)

PATENTANSPRÜCHE: i. Schutzvorrichtung gegen ungleichmäßige Belastung, Überlastung und Unterbelastung für mehrphasige elektrische Verteilungssysteme, gekennzeichnet durch mehrere temperaturempfindliche Elemente, ein durchgehendes bewegliches Verbindungsglied, mit welchem je ein Ende der genannten Elemente verbunden ist, mehrere Schaltglieder, mit denen die anderen Enden der Elemente verbunden sind, mit Ausnahme eines Elementes, dessen mit dem Verbindungsglied nicht verbundenes Ende fest angeordnet ist. PATENT CLAIMS: i. Protective device against uneven loading, overloading and underloading for multi-phase electrical distribution systems, characterized by several temperature-sensitive elements, a continuous movable connecting element to which one end of the named elements is connected, several switching elements to which the other ends of the elements are connected, with the exception an element whose end not connected to the connecting link is fixedly arranged. 2. Schutzvorrichtung gemäß Anspruch i, dadurch gekennzeichnet, daß als temperaturempfindliche Elemente Bimetallstreifen dienen, ,die spiralenförmig gewunden sind und deren eines Ende jeweils mit einem als durchgehendes Verbindungsglied dienenden Stab verbunden ist.2. Guard according to claim i, characterized in that the temperature-sensitive elements Bimetal strips are used, which are helically wound and one end of which is each connected to a rod serving as a continuous connecting member.
DEC488A 1949-02-02 1950-02-03 Protection device against uneven loading, overloading and underloading for multi-phase electrical distribution systems Expired DE856760C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB856760X 1949-02-02

Publications (1)

Publication Number Publication Date
DE856760C true DE856760C (en) 1952-11-24

Family

ID=10590609

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC488A Expired DE856760C (en) 1949-02-02 1950-02-03 Protection device against uneven loading, overloading and underloading for multi-phase electrical distribution systems

Country Status (1)

Country Link
DE (1) DE856760C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1128013B (en) * 1960-03-12 1962-04-19 Metzenauer & Jung G M B H Trip device for thermal relays

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1128013B (en) * 1960-03-12 1962-04-19 Metzenauer & Jung G M B H Trip device for thermal relays

Similar Documents

Publication Publication Date Title
DE2500600A1 (en) CONTROL DEVICE FOR A TWO-SPEED COOLANT COMPRESSOR
DE2310103A1 (en) ELECTRONIC OVERCURRENT RELEASE
DE856760C (en) Protection device against uneven loading, overloading and underloading for multi-phase electrical distribution systems
DE837869C (en) Current-sensitive switching device with thermosensitive elements for the protection of multi-phase circuits
AT165999B (en) Device for protecting three-phase motors against overcurrent
DE589153C (en) Relay for distance protection circuits
DE733607C (en) Overcurrent monitoring device
DE759135C (en) Switchgear for low-voltage circuits
DE492590C (en) Thermoregulator
DE3810043A1 (en) METHOD AND DEVICE FOR ADJUSTING A BIMETAL TRIGGER
AT121889B (en) Bimetal element.
DE877792C (en) Circuit breaker for multi-phase power consumers with extended protective properties
DE837870C (en) Electrical switch with a relay device for the automatic triggering of the switch
DE554319C (en) Extinguishing spark arrester with circuit breaker
DE477854C (en) Hot wire meter
DE843115C (en) Thermal overload protection for electrical machines, devices and systems and parts of these systems
DE572029C (en) Heat relay
CH311387A (en) Thermal protection device on a three-phase alternating current device, in particular on a three-phase alternating current motor.
DE707958C (en) Auto switch
DE701062C (en) Summation current transformer circuit for multi-phase systems
DE687470C (en) Thermal overcurrent switch
DE676877C (en) Overcurrent release for a residual current circuit breaker with differential winding
DE649766C (en) Overcurrent protection device for capacitors in networks with changing shape of the voltage curve
AT234810B (en) Electrothermal overload protection device for multi-phase electrical devices
AT231547B (en) Thermal overcurrent relay with phase failure protection