EP0902453A2 - Device for adjusting a thermal tripping device, particularly for a circuit breaker - Google Patents
Device for adjusting a thermal tripping device, particularly for a circuit breaker Download PDFInfo
- Publication number
- EP0902453A2 EP0902453A2 EP98113767A EP98113767A EP0902453A2 EP 0902453 A2 EP0902453 A2 EP 0902453A2 EP 98113767 A EP98113767 A EP 98113767A EP 98113767 A EP98113767 A EP 98113767A EP 0902453 A2 EP0902453 A2 EP 0902453A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- adjusting
- screw
- lever
- circuit breaker
- thermal
- 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.)
- Granted
Links
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7427—Adjusting only the electrothermal mechanism
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7427—Adjusting only the electrothermal mechanism
- H01H2071/7454—Adjusting only the electrothermal mechanism with adjustable axis of transmission lever between bimetal element and trip lever
Definitions
- the invention relates to a device according to the preamble of claim 1.
- the adjustment process is not reversible, d. H. not repeatable any number of times with the same adjustment result, because certain plastic deformations are possible. If the distance between the Bimetal and the transmission lever or trigger element is set, then transmit a force to the bimetal via the screw, which affects the constancy of adjustment can.
- the object of the invention is to provide a device of the type mentioned in the introduction, a safe and constant thermal adjustment with low assembly and enables technical testing effort and is reversible and as often as desired with the same Adjustment result is repeatable.
- the screw is non-displaceably and rotatably guided. It is screwed into an adjusting lever that is connected to the transmission lever or the Transfer slide is coupled, and by turning the screw and adjusting the adjustment lever can be the distance between the transmission lever and the latching point be adjusted in the key switch.
- a circuit breaker 10 In a circuit breaker 10 is an electromagnetic release 11 and thermal trigger 12 shown in the form of a thermal bimetal.
- the electromagnetic The trigger acts via the line of action 13 and a striking pin 13a on the latching point a key switch 14, and the thermal trigger 12, the one End 15 is clamped stationary, transmits the movement of its free end 16 a transfer slide 17 which is linearly displaceable within a guide 18 is guided, also to the latching point of the key switch 14, see further below.
- a contact lever 19 pivoted so that a contact point 20 is opened, which is in a cable run 21 is located between two terminals 22 and 23.
- the electromagnetic trigger acts directly on the striking pin 13a the contact lever 19 and thus on the contact point 20.
- the device for adjusting the bimetallic strip 12 comprises a screw 23 which has a recess 24, via which it can be rotated in a stationary holder 25 and is guided immovably.
- the screw does not cause any translatory relative movement when turning Direction of its longitudinal axis based on the fixation in the holder 25, but will just rotated about its longitudinal axis.
- the threaded portion 26 of the screw 23 is in screwed an adjusting lever 27, one end of which is fixed at 28 and the other end 29, which here has an L-shape, with the bimetal 12 cooperates.
- the adjusting lever 27 is screw 27 pivoted clockwise about the fixed axis of rotation 28, whereby the free end 16 of the bimetallic metal 12 comes into contact with the slide 17.
- the adjusting lever 27 moves the striking pin on the Latching point of the rear derailleur and unlatches it. From this point on the Screw 23 turned back a certain number of turns. Because of of the outside diameter and the pitch of the thread in the threaded section 26 can between the latching point in the switching mechanism 14, the striker 13a, the slide 17, the transmission lever 27 and the bimetallic 12 a certain Distance can be achieved; this particular distance defines the lead of the Thermobimetal 12 for thermal tripping.
- the bimetal 12 heats up due to a current flow through the conduction path 21 and bends counterclockwise with its free end towards that Transfer slide 17 from. It pivots the adjustment lever over this slide, which moves the striker and hits the latch and the key switch 14 unlatched.
Landscapes
- Breakers (AREA)
- Thermally Actuated Switches (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung gemäß dem Oberbegriff des Anspruches 1.The invention relates to a device according to the preamble of claim 1.
Leitungsschutzschalter, die zum Abschalten eines Netzes bei Überstrom oder Kurzschlußstrom dienen, besitzen für die Auslösung bei einem Überstrom einen thermischen Auslöser, der meistens als Thermobimetall ausgebildet ist. Da gewisse Toleranzen vorhanden sind, ist es erforderlich, nach der Endmontage des Leitungsschutzschalters diesen zu justieren. Dies erfolgt in den meisten Fällen dadurch, daß die Befestigungsstelle des Thermobimetalls mittels einer Justierschraube verformt wird bzw. der Abstand zwischen dem Übertragungshebel oder dem Übertragungsschieber und dem Thermobimetall mittels einer im Bimetall gelagerten Schraube von außen verstellt wird.Miniature circuit breakers used to switch off a network in the event of overcurrent or short-circuit current serve, have a thermal for tripping in case of an overcurrent Trigger, which is mostly designed as a bimetal. Because of certain tolerances are present, it is necessary after the final assembly of the circuit breaker to adjust this. In most cases, this takes place in that the attachment point the bimetal is deformed by means of an adjusting screw or the distance between the transfer lever or the transfer slide and the thermal bimetal is adjusted from the outside by means of a screw mounted in the bimetal becomes.
Je nach Elastizität des Materials der Bimetallbefestigung ist der Justagevorgang nicht reversibel, d. h. nicht beliebig oft bei gleichbleibendem Justierergebnis wiederholbar, da gewisse plastische Verformungen möglich sind. Wenn der Abstand zwischen dem Bimetall und dem Übertragungshebel oder Auslöseelement eingestellt wird, dann wird über die Schraube eine Kraft auf das Bimetall übertragen, was die Justierkonstanz beeinflussen kann. Depending on the elasticity of the material of the bimetal fastening, the adjustment process is not reversible, d. H. not repeatable any number of times with the same adjustment result, because certain plastic deformations are possible. If the distance between the Bimetal and the transmission lever or trigger element is set, then transmit a force to the bimetal via the screw, which affects the constancy of adjustment can.
Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs genannten Art zu schaffen, die eine sichere und konstante thermische Justage mit geringem montage- und prüftechnischem Aufwand ermöglicht und die reversibel und beliebig oft bei gleichbleibendem Justierergebnis wiederholbar ist.The object of the invention is to provide a device of the type mentioned in the introduction, a safe and constant thermal adjustment with low assembly and enables technical testing effort and is reversible and as often as desired with the same Adjustment result is repeatable.
Diese Aufgabe wird erfindungsgemäß gelöst durch die kennzeichnenden Merkmale des Anspruches 1.This object is achieved by the characterizing features of the Claim 1.
Erfindungsgemäß also ist die Schraube ortsfest unverschieblich und drehbar geführt. Sie ist in einem Justierhebel eingeschraubt, der mit dem Übertragungshebel oder dem Übertragungsschieber gekoppelt ist, und durch Verdrehen der Schraube und Verstellen des Justierhebels kann der Abstand zwischen dem Übertragungshebel und der Verklinkungsstelle im Schaltschloß einjustiert werden.According to the invention, the screw is non-displaceably and rotatably guided. It is screwed into an adjusting lever that is connected to the transmission lever or the Transfer slide is coupled, and by turning the screw and adjusting the adjustment lever can be the distance between the transmission lever and the latching point be adjusted in the key switch.
Eine elastische Verformung irgend eines mit dem Thermobimetall verbundenen Bauteiles ist nicht gegeben, so daß mittels der erfindungsgemäßen Ausführung der Justiervorgang häufig wiederholt werden kann, und zwar mit immer gleichem Ergebnis.An elastic deformation of any component connected to the bimetal is not given, so that the adjustment process by means of the inventive design can be repeated frequently and always with the same result.
Weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung sind den weiteren Unteransprüchen zu entnehmen.Further advantageous refinements and improvements of the invention are the see further subclaims.
Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung dargestellt ist,
sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen
der Erfindung näher erläutert und beschrieben werden.
In einem Leitungsschutzschalter 10 ist ein elektromagnetischer Auslöser 11 und ein
thermischer Auslöser 12 in Form eines Thermobimetalls dargestellt. Der elektromagnetische
Auslöser wirkt über die Wirklinie 13 und einen Schlagstift 13a auf die Verklinkungsstelle
eines Schaltschlosses 14, und der thermische Auslöser 12, der an einem
Ende 15 ortsfest eingespannt ist, überträgt die Bewegung seines freien Endes 16 über
einen Übertragungsschieber 17, der innerhalb einer Führung 18 linear verschieblich
geführt ist, ebenfalls auf die Verklinkungsstelle des Schaltschlosses 14, siehe weiter
unten. Über diese Verklinkungsstelle des Schaltschlosses 14 wird ein Kontakthebel 19
verschwenkt, so daß eine Kontaktstelle 20 geöffnet wird, die sich in einem Leitungszug
21 zwischen zwei Anschlußklemmen 22 und 23 befindet. Zur Abschaltung eines Kurzschlusses
wirkt der elektromagnetische Auslöser über den Schlagstift 13a direkt auf
den Kontakthebel 19 und damit auf die Kontaktstelle 20 ein.In a
Die Vorrichtung zur Justierung des Thermobimetalls 12 umfaßt eine Schraube 23, die
eine Eindrehung 24 aufweist, über die sie in einem ortsfesten Halter 25 drehbar und
unverschieblich geführt ist.The device for adjusting the
Dadurch führt die Schraube beim Drehen keine translatorische Relativbewegung in
Richtung ihrer Längsachse bezogen auf die Fixierung im Halter 25 durch, sondern wird
lediglich um ihre Längsachse gedreht. Der Gewindeabschnitt 26 der Schraube 23 ist in
einen Justierhebel 27 eingeschraubt, dessen eines Ende ortsfest bei 28 gelagert ist
und dessen anderes Ende 29, welches hier eine L-Form besitzt, mit dem Thermobimetall
12 zusammenwirkt.As a result, the screw does not cause any translatory relative movement when turning
Direction of its longitudinal axis based on the fixation in the
Wenn nun justiert werden soll, dann wird mittels der Schraube 23 der Justierhebel 27
im Uhrzeigersinn um die ortsfeste Drehachse 28 verschwenkt, wodurch das freie Ende
16 des Thermobimetalls 12 mit dem Schieber 17 in Berührung gelangt. Beim Weiterdrehen
der Schraube 23 verschiebt der Justierhebel 27 den Schlagstift, der auf die
Verklinkungsstelle des Schaltwerkes und entklinkt dieses. Ab diesem Zeitpunkt wird die
Schraube 23 um eine bestimmte Anzahl von Umdrehungen zurückgedreht. Aufgrund
des Außendurchmessers und der Steigung des Gewindes im Gewindeabschnitt 26
kann dabei zwischen der Verklinkungsstelle im Schaltschloß 14, dem Schlagstift 13a,
dem Schieber 17, dem Übertragungshebel 27 und dem Thermobimetall 12 ein bestimmter
Abstand erzielt werden; dieser bestimmte Abstand definiert den Vorlauf des
Thermobimetalls 12 für die thermische Auslösung.If it is now to be adjusted, the adjusting
Aufgrund eines Stromflusses durch den Leitungspfad 21 erwärmt sich das Bimetall 12
und biegt sich entgegen dem Uhrzeigersinn mit seinem freien Ende in Richtung zu dem
Übertragungsschieber 17 aus. Über diesen Schieber verschwenkt es den Justierhebel,
der den Schlagstift verschiebt und auf die Verklinkungsstelle auftrifft und das Schaltschloß
14 entklinkt.The
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19739821A DE19739821A1 (en) | 1997-09-11 | 1997-09-11 | Device for adjusting a thermal release, in particular for a circuit breaker |
DE19739821 | 1997-09-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0902453A2 true EP0902453A2 (en) | 1999-03-17 |
EP0902453A3 EP0902453A3 (en) | 1999-11-24 |
EP0902453B1 EP0902453B1 (en) | 2005-11-23 |
Family
ID=7841927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98113767A Expired - Lifetime EP0902453B1 (en) | 1997-09-11 | 1998-07-23 | Device for adjusting a thermal tripping device, particularly for a circuit breaker |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0902453B1 (en) |
AT (1) | ATE311015T1 (en) |
DE (2) | DE19739821A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1077462A2 (en) * | 1999-08-17 | 2001-02-21 | ABBPATENT GmbH | Trip device for a circuit breaker |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR669531A (en) * | 1928-02-13 | 1929-11-18 | Schiele & Bruchsaler Ind | Method and device for the calibration and adjustment of overload circuit breakers |
DE2717116A1 (en) * | 1977-04-19 | 1978-10-26 | Hundt & Weber | Polyphase power switch with thermal trip - has release bar operated by bimetallic strips and mechanically connected to switching=off lever |
FR2581243A1 (en) * | 1985-04-27 | 1986-10-31 | Licentia Gmbh | Magnetic and thermal circuit breaker switch |
EP0258124A1 (en) * | 1986-08-14 | 1988-03-02 | Telemecanique | Adjusting device for the thermal current of a bimetal thermal tripping device, and protective switch having such a device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE600061C (en) * | 1928-02-24 | 1934-07-13 | Schiele & Bruchsaleri Industri | Calibration and setting device for thermal releases of overcurrent switches |
-
1997
- 1997-09-11 DE DE19739821A patent/DE19739821A1/en not_active Withdrawn
-
1998
- 1998-07-23 EP EP98113767A patent/EP0902453B1/en not_active Expired - Lifetime
- 1998-07-23 AT AT98113767T patent/ATE311015T1/en not_active IP Right Cessation
- 1998-07-23 DE DE59813214T patent/DE59813214D1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR669531A (en) * | 1928-02-13 | 1929-11-18 | Schiele & Bruchsaler Ind | Method and device for the calibration and adjustment of overload circuit breakers |
DE2717116A1 (en) * | 1977-04-19 | 1978-10-26 | Hundt & Weber | Polyphase power switch with thermal trip - has release bar operated by bimetallic strips and mechanically connected to switching=off lever |
FR2581243A1 (en) * | 1985-04-27 | 1986-10-31 | Licentia Gmbh | Magnetic and thermal circuit breaker switch |
EP0258124A1 (en) * | 1986-08-14 | 1988-03-02 | Telemecanique | Adjusting device for the thermal current of a bimetal thermal tripping device, and protective switch having such a device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1077462A2 (en) * | 1999-08-17 | 2001-02-21 | ABBPATENT GmbH | Trip device for a circuit breaker |
EP1077462A3 (en) * | 1999-08-17 | 2002-12-11 | ABB PATENT GmbH | Trip device for a circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
DE19739821A1 (en) | 1999-03-18 |
EP0902453B1 (en) | 2005-11-23 |
EP0902453A3 (en) | 1999-11-24 |
ATE311015T1 (en) | 2005-12-15 |
DE59813214D1 (en) | 2005-12-29 |
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