DE8814715U1 - Compensation capacitor for three-phase motors - Google Patents

Compensation capacitor for three-phase motors

Info

Publication number
DE8814715U1
DE8814715U1 DE8814715U DE8814715U DE8814715U1 DE 8814715 U1 DE8814715 U1 DE 8814715U1 DE 8814715 U DE8814715 U DE 8814715U DE 8814715 U DE8814715 U DE 8814715U DE 8814715 U1 DE8814715 U1 DE 8814715U1
Authority
DE
Germany
Prior art keywords
capacitor
housing
capacitor according
chokes
motor
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
DE8814715U
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.)
Haufschulz Oskar M Dipl-Ing 4133 Neukirchen-Vluyn De
Original Assignee
Haufschulz Oskar M Dipl-Ing 4133 Neukirchen-Vluyn De
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 Haufschulz Oskar M Dipl-Ing 4133 Neukirchen-Vluyn De filed Critical Haufschulz Oskar M Dipl-Ing 4133 Neukirchen-Vluyn De
Priority to DE8814715U priority Critical patent/DE8814715U1/en
Publication of DE8814715U1 publication Critical patent/DE8814715U1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/224—Housing; Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
    • H01G4/385—Single unit multiple capacitors, e.g. dual capacitor in one coil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Emergency Protection Circuit Devices (AREA)

Description

Zur Gebrauchsmusteranmeldung O. Häufschuld vom 24.11.1988 BeschreibungRegarding the utility model application O. Häufschuld dated 24.11.1988 Description

Kompensationskondensator für DrehstrommotorenCompensation capacitor for three-phase motors

Die Erfindung bezieht sich auf einen Kompensationskondensator mit Sternpunktüberwachung für Drehstrommotoren. Speziell für Motoren im Steinkohlenbergbau unter Tage in Schlagwetter geschützter Ausführung.The invention relates to a compensation capacitor with star point monitoring for three-phase motors. Especially for motors in underground coal mining in a firedamp-protected design.

Kompensationskondensatoren zur Verbesserung des Leistungsfaktors werden echo» sehr oft in größeren Anlegen zur Verbesserung des Gesamtleistungsfaktore oder für den Betrieb eines einzelnen induktiven Verbrauchers (Motoren) eingesetzt.Compensation capacitors for improving the power factor are very often used in larger systems to improve the overall power factor or to operate a single inductive load (motors).

Die bisher im Steinkohlenbergbau unter Tage eingesetzten Kompensationskondensato^en werden am örtlichen Haupttransformator in Form einer Kondensatorenbatterie mit abgestufter Kapazität eingesetzt. Die Zuschaltung der einzelnen Kondensatoren erfolgt über eine Regeleinrichtung. Diese Regeleinrichtung kann aber nicht schnell genug den Leistungsfaktoränderungen folgen. Außerdem ist eine solche Einrichtung sehr teuer.The compensation capacitors previously used in underground coal mining are used on the local main transformer in the form of a capacitor bank with graduated capacity. The individual capacitors are connected via a control device. However, this control device cannot follow the power factor changes quickly enough. In addition, such a device is very expensive.

Die Erfindung beruht darauf, daß ein einzelner Drehstrommotor erst nach Abklingen des Einschaltstromes eingeschaltet wird.The invention is based on the fact that a single three-phase motor is only switched on after the inrush current has decayed.

• · · · t ft ·• · · · t ft ·

« ■ · t t« ■ · t t

Damit überlagert &ich der Einschaltstrom des Kondensators ' nicht dem Einschaltstrom des Motors und es wird erreicht, daßThis means that the inrush current of the capacitor does not overlap the inrush current of the motor and it is achieved that

der Kondensator erst bei Erreichen des Betriebsstromes wirkf sam wird, denn in der Hochlaufphase des Motors ist der Leistungsfaktor ca. 0,8,also gut.The capacitor only becomes effective when the operating current is reached, because in the start-up phase of the motor the power factor is approx. 0.8, so good.

Der Kondensator vermindert so nur den eigentlichen Betriebsstrom der für die Bemessung des Leistungsnetzes von Bedeutung ist. Der Kondensator ist in zwei gleiche Teile aufgeteilt mit je einem Sternpunkt (5a) u. (5b). Normalerweise fließt zwischen den beiden Sternpunkten kein Strom. Ist ein System gestört, so flieSt ein Ausgleichsstrom zwischen den beiden Sternpunkten (5a) u. (5b), der dazu herangezogen wird, den gesamten Kondensator von der Motorzuleitung abzutrennen (6).The capacitor thus only reduces the actual operating current, which is important for the dimensioning of the power network. The capacitor is divided into two equal parts, each with a star point (5a) and (5b). Normally, no current flows between the two star points. If a system is faulty, a compensating current flows between the two star points (5a) and (5b), which is used to disconnect the entire capacitor from the motor supply line (6).

Der Motor lauft dann ohne Kondensator weiter. Erst wenn der Motor nach einem Stilletand wieder eingeschaltet wird, prüft die überwachungsschaltung, ob noch ein Fehler im Kondensatox vorliegt. Ist alles in Ordnung wird der Kondensator ordnungsgemäß eingeschaltet. Der ordnungsgemäße Betrieb des Kondensators wird optisch (Lampe) angezeigt.The motor then continues to run without a capacitor. Only when the motor is switched on again after a standstill does the monitoring circuit check whether there is still an error in the capacitor. If everything is OK, the capacitor is switched on properly. Proper operation of the capacitor is indicated optically (lamp).

Im Kondensatorgehäuee befinden sich die beiden Kondensatorhälften (5a) u. (5b),das Kondensatorschtttz (2), die Strombegrenzungsdrosseln (4) und die Entladedrosseln (7). Die StrombegrenzungsdroEseln (4) begrenzen den Kondensatorstrom im Einschaltmoment.The capacitor housing contains the two capacitor halves (5a) and (5b), the capacitor shield (2), the current limiting chokes (4) and the discharge chokes (7). The current limiting chokes (4) limit the capacitor current at the moment of switching on.

Die Entladedrosseln (7) sorgen für eine Entladung der KondensatorenThe discharge chokes (7) ensure that the capacitors are discharged

auf 0,2 BJ In S . (Vorschrift).to 0.2 BJ In S . (regulation).

Claims (8)

Zur GebrauchsmuateranmejldVpg· vom 24.11.88 Schutzansprüche Xompensationskondensator für DrehstrommotorenTo the utility model regulation of 24.11.88 Protection claims Xompensation capacitor for three-phase motors 1. dadurch gekennselohnet, daß der Kondensator in einem gemeinsamen Gehäuse in zwei gleichgroße Teile aufgespalten wird. (1) 1. characterized by the capacitor being split into two equal parts in a common housing. (1) 2. Kondensator naoh Anspruch 1 dadurch gekennzeichnet, daß im gleichen Gehäuse in dem sieh die zwei Kondensatorenhälften (Sa) u.(Sb) befinden auch das Kondensator schütz, (2) die Sternpunktüberwachung (6) die Strombegrenaungsdrosseln (4), die Kftdladedrosseln (?) und ?. Schmelz sicherungen (3) befinden.2. Capacitor according to claim 1, characterized in that in the same housing in which the two capacitor halves (Sa) and (Sb) are located, the capacitor protection (2), the star point monitoring (6), the current limiting chokes (4), the cooling charge chokes (?) and ?. fuses (3) are also located. 3. Kondensator nach Anspruch 1 + 2 dadurch gekennzeichnet, dad sich im Kondensatorgehäuse ein Schütz (2) befindet, welches zusammen mit der ebenfalls im Gehäuse vorhandenen Schutzeinrichtung (6) im Fehlerfalle beide Kondensatorhälften vom Netz trennt.3. Capacitor according to claim 1 + 2, characterized in that a contactor (2) is located in the capacitor housing, which, together with the protective device (6) also present in the housing, separates both halves of the capacitor from the mains in the event of a fault. 4. Kondensator nach Anspruch 1-3 dadurch gekennzeichnet, daß die Schutzeinrichtung (6) ein Zeitglied enthält, welches nach ca. 2 Sekunden die beiden Kondensatorhälften einsehaltet. Damit wird verhindert, daß in der Einschaltphase des Motors der Kondensatoreinschaltstrom zusätzlich zum Einschaltstrom des Motors das Netz belastet.4. Capacitor according to claims 1-3, characterized in that the protective device (6) contains a timer which switches the two capacitor halves on after approximately 2 seconds. This prevents the capacitor inrush current from loading the network in addition to the motor inrush current during the motor's switch-on phase. 5. Kondensator nach Anspruch 1 - 4 dadurch gekennzeichnet, daß 3 Schmelzsicherungen im Kondensatorgehäuse für
zusätzlichen Schute sorgen. (3).5. Capacitor according to claim 1 - 4, characterized in that 3 fuses in the capacitor housing for
provide additional barge. (3). 6. Kondensator nach Anspruch 1 - 5 dadurch gekennzeichnet, daß der Anschlußkasten des Kondensatorgehäuses (1) eine Durehachleifen der Motorzuleitung ermöglicht.6. Capacitor according to claims 1 - 5, characterized in that the connection box of the capacitor housing (1) enables a through-looping of the motor supply line. 7. Kondensator nach Anspruch 1 - 6 dadurch gekennzeichnet, dafi für den Einsatz in Steinkohlenbergwerken unter Tage die Anordnung aus den Teilen (1) - (7) in einsohlagwettergesohützten Gehäusen untergebracht wird.7. Capacitor according to claims 1 - 6, characterized in that for use in underground coal mines, the arrangement of the parts (1) - (7) is housed in housings protected against firedamp. 8. Kondensator nach Anspruch 1 - 7 dadurch gekennzeichnet, daß mit den Bntladedrosseln (7) die Restenergie in den Kondensatoren innerhalb von 5 &bgr; auf 0,2 mJ abgebaut
wird und durch die Begrenzungedrosseln (4) der Einschaltstrom auf Werte begrenzt wird, welche die vorgeschalteten Schütze gefährden.8. Capacitor according to claim 1 - 7, characterized in that with the discharge chokes (7) the residual energy in the capacitors is reduced to 0.2 mJ within 5 β
and the limiting chokes (4) limit the inrush current to values which endanger the upstream contactors.
DE8814715U 1988-11-25 1988-11-25 Compensation capacitor for three-phase motors Expired DE8814715U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8814715U DE8814715U1 (en) 1988-11-25 1988-11-25 Compensation capacitor for three-phase motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8814715U DE8814715U1 (en) 1988-11-25 1988-11-25 Compensation capacitor for three-phase motors

Publications (1)

Publication Number Publication Date
DE8814715U1 true DE8814715U1 (en) 1989-05-03

Family

ID=6830196

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8814715U Expired DE8814715U1 (en) 1988-11-25 1988-11-25 Compensation capacitor for three-phase motors

Country Status (1)

Country Link
DE (1) DE8814715U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9016540U1 (en) * 1990-12-05 1992-04-09 Siemens AG, 8000 München Reactive power compensation device housed in a movable housing
WO1996001516A1 (en) * 1994-07-01 1996-01-18 Siemens Aktiengesellschaft Three-phase reactive-power controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9016540U1 (en) * 1990-12-05 1992-04-09 Siemens AG, 8000 München Reactive power compensation device housed in a movable housing
WO1996001516A1 (en) * 1994-07-01 1996-01-18 Siemens Aktiengesellschaft Three-phase reactive-power controller

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