EP0375732A1 - Locking device for switchgear with electromagnetic drive - Google Patents
Locking device for switchgear with electromagnetic driveInfo
- Publication number
- EP0375732A1 EP0375732A1 EP88908152A EP88908152A EP0375732A1 EP 0375732 A1 EP0375732 A1 EP 0375732A1 EP 88908152 A EP88908152 A EP 88908152A EP 88908152 A EP88908152 A EP 88908152A EP 0375732 A1 EP0375732 A1 EP 0375732A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- locking lever
- tongue
- locking device
- locking
- lever
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
- H01H50/32—Latching movable parts mechanically
- H01H50/321—Latching movable parts mechanically the mechanical latch being controlled directly by the magnetic flux or part of it
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
Definitions
- the invention relates to a locking device with a locking lever against unintentional actuation of a switching device with an electromagnetic drive, in particular a vacuum contactor, the locking lever being pivotally mounted against the force of a return spring and in the de-energized state of the electromagnetic drive with an end face of a working surface of a movable part of the magnetic drive is arranged opposite one another with a small distance in relation to its working stroke.
- a locking device • This type is known from DE-OS 35 ⁇ 24 526.
- the locking lever from the working surface of the movable part of the magnetic drive z.
- B. the movable armature is moved so quickly that this movable part can perform the intended working stroke unimpeded.
- This condition is generally given by the fact that the resistance to movement of the movable part of the magnetic drive together with the resistance to movement of the switching points to be actuated, in particular the vacuum interrupters, results in a speed of the movement sequence which is considerably lower than that of the locking lever.
- the known locking device can also be used by the invention in the event that the movement resistance mentioned is considerably lower and, as a result, the normal switching on of the switching device by the locking lever could occur.
- the locking lever carries an extension made of ferromagnetic material on its side facing the magnetic drive.
- the magnetic field of the magnetic drive can act more strongly on the locking lever and accelerate it more strongly when switched on.
- the extension can be designed as a tongue arranged at an acute angle to the locking lever. Due to the angular position of the tongue, the user of the locking device has it in his hand to adapt it to the properties of the respective switching device.
- the tongue in one piece with the locking lever and starting from its end adjacent to the bearing point.
- the different angle can then be set by bending the tongue to a greater or lesser extent.
- the locking lever has a main body with an approximately U-shaped or C-shaped cross-sectional shape and the tongue is formed by a continuation of the central part of the U-shaped or C-shaped profile .
- the locking lever including the tongue, can consist of a soft magnetic steel sheet and can be provided with openings to reduce the inertia.
- the number and size of the openings also influence the speed of the movement of the locking lever when the switching device is switched on.
- FIG. 1 shows a side view of the drive device of a vacuum contactor with a locking lever according to the invention in a simplified representation.
- Figures 2, 3 and 4 show the locking lever as a single part in three mutually perpendicular views.
- an electromagnetic drive device 1 is accommodated in a box-shaped housing 2 and has two coils 3.
- the two coils 3 are arranged side by side in the manner shown in DE-OS 35 24 526.
- a lever 4 provided with an armature 5 is capable of executing a clockwise pivoting movement which serves to actuate the vacuum interrupters, one of which is indicated schematically and designated by 8.
- a locking device 6 is provided, which is arranged between the two coils 3 as a coherent component.
- the locking device 6 consists of a bearing block 7, a locking lever 10 and a return spring 11.
- a locking piece 12 is attached to the lever 4, which with a working surface 13 faces an end surface 14 (FIG. 2) of the locking lever 10 at a short distance.
- the locking device 6 is fastened as a unit to the yoke of the coils 3 by means of at least one screw 9.
- the locking lever 10 has a main body with an approximately U-shaped or C-shaped cross-sectional shape with legs 15 and 16 and with a central part 17.
- a tongue 18 extends from the central part 17 of the main body, specifically from the end at which bearing openings 20 and 21 are provided in the legs 15 and 16 for the pivotable mounting on the bearing block 6 shown in FIG. Proceeding from a bending radius 22 suitable for production, the tongue 18 is at an acute angle to the central part 17.
- the tongue 18 extends even further into the space between the coils 3 and is therefore exposed to the magnetic field there even more than the main body of the locking lever with the central part 17 and the legs 15 and 16. In this way, the locking lever 10 is pivoted particularly quickly.
- the central part 17 of the locking lever 10 contains openings 23, the shape and number of which can be selected in such a way that the inertia of the locking lever 10 is reduced and the desired rapid response behavior is thereby achieved.
- the locking lever 10 can be made in one piece from soft magnetic steel sheet and requires only a few machining operations. Therefore, the angle between the tongue 18 and the middle part 17 can also be chosen appropriately in order to also influence the response behavior.
- a bent end part 24 of the tongue 18 is shown in dash-dot lines, as is also shown in the example according to FIG. 1.
- the length and the position of this end part 24 limit the bending path of the tongue 18 relative to that
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
- Lock And Its Accessories (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Un dispositif de verrouillage (6) prévu notamment pour des contacteurs électromagnétiques à dépression empêche un enclenchement inopiné du contacteur par suite d'influences mécaniques quelconques, tant que la commande électromagnétique (1) n'est pas excitée. On y parvient grâce à un levier d'arrêt (10) monté pivotant sur un palier (7) entre les deux bobines (3) parallèles de la commande (1). Une languette (18) inclinée selon un angle aigu et assurant la continuité de la partie médiane (17) de l'élément principal en forme de U ou de C du levier d'arrêt (10) permet un déclenchement particulièrement rapide de ce dernier.A locking device (6) provided in particular for electromagnetic vacuum contactors prevents an unexpected engagement of the contactor as a result of any mechanical influences, as long as the electromagnetic control (1) is not energized. This is achieved by a stop lever (10) pivotally mounted on a bearing (7) between the two parallel coils (3) of the control (1). A tongue (18) inclined at an acute angle and ensuring the continuity of the median part (17) of the main U-shaped or C-shaped element of the stop lever (10) enables the latter to be released particularly quickly.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8715295U DE8715295U1 (en) | 1987-11-13 | 1987-11-13 | Locking device for a switching device with electromagnetic drive |
DE8715295U | 1987-11-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0375732A1 true EP0375732A1 (en) | 1990-07-04 |
EP0375732B1 EP0375732B1 (en) | 1991-06-05 |
Family
ID=6814217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88908152A Expired - Lifetime EP0375732B1 (en) | 1987-11-13 | 1988-09-29 | Locking device for switchgear with electromagnetic drive |
Country Status (5)
Country | Link |
---|---|
US (1) | US5075661A (en) |
EP (1) | EP0375732B1 (en) |
JP (1) | JP2615178B2 (en) |
DE (2) | DE8715295U1 (en) |
WO (1) | WO1989004544A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8715295U1 (en) * | 1987-11-13 | 1988-01-07 | Siemens AG, 1000 Berlin und 8000 München | Locking device for a switching device with electromagnetic drive |
WO2014146678A1 (en) * | 2013-03-18 | 2014-09-25 | Abb Technology Ag | Magnetic actuating device for a current switching device |
CN106783410A (en) * | 2015-11-25 | 2017-05-31 | 湖南开磷雁峰塔涂料有限公司 | A kind of A.C. contactor on paint production plant |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1075557B (en) * | 1960-02-18 | SaIfret Limited, London | Edge filter for liquid or gaseous media | |
FR1075557A (en) * | 1953-03-09 | 1954-10-18 | Langlade Et Picard Ets | Improvements to electromagnetic relays |
DE1160930B (en) * | 1959-09-23 | 1964-01-09 | Starkstrom Appbau G M B H | Shock lock for anchor flaps |
US3249716A (en) * | 1963-12-26 | 1966-05-03 | Allen Bradley Co | Time delay device |
US4237436A (en) * | 1979-01-15 | 1980-12-02 | Heinemann Electric Company | Circuit breaker having a modified armature for time delays at high transient currents |
DE3524526A1 (en) * | 1985-07-05 | 1987-01-15 | Siemens Ag | Locking device having a locking armature to prevent a switching apparatus being operated inadvertently |
US4683451A (en) * | 1986-03-14 | 1987-07-28 | Westinghouse Electric Corp. | Circuit breaker with trip delay magnetic circuit |
DE8715295U1 (en) * | 1987-11-13 | 1988-01-07 | Siemens AG, 1000 Berlin und 8000 München | Locking device for a switching device with electromagnetic drive |
-
1987
- 1987-11-13 DE DE8715295U patent/DE8715295U1/en not_active Expired
-
1988
- 1988-09-29 EP EP88908152A patent/EP0375732B1/en not_active Expired - Lifetime
- 1988-09-29 JP JP63507555A patent/JP2615178B2/en not_active Expired - Lifetime
- 1988-09-29 DE DE8888908152T patent/DE3863179D1/en not_active Expired - Fee Related
- 1988-09-29 WO PCT/DE1988/000607 patent/WO1989004544A1/en active IP Right Grant
- 1988-09-29 US US07/477,987 patent/US5075661A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO8904544A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1989004544A1 (en) | 1989-05-18 |
JP2615178B2 (en) | 1997-05-28 |
EP0375732B1 (en) | 1991-06-05 |
JPH03502020A (en) | 1991-05-09 |
DE3863179D1 (en) | 1991-07-11 |
US5075661A (en) | 1991-12-24 |
DE8715295U1 (en) | 1988-01-07 |
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Legal Events
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