CN201503830U - Selective releasing device for low-voltage circuit breaker - Google Patents
Selective releasing device for low-voltage circuit breaker Download PDFInfo
- Publication number
- CN201503830U CN201503830U CN2009202343744U CN200920234374U CN201503830U CN 201503830 U CN201503830 U CN 201503830U CN 2009202343744 U CN2009202343744 U CN 2009202343744U CN 200920234374 U CN200920234374 U CN 200920234374U CN 201503830 U CN201503830 U CN 201503830U
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- CN
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- Prior art keywords
- rod
- circuit breaker
- armature
- threading
- voltage circuit
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Abstract
The utility model discloses a selective releasing device for a low-voltage circuit breaker, which comprises three electrode conductors, an insulating shell and a regulating part fixed thereon, wherein a releasing rod is mounted on the insulating shell, a regulating bar is parallelly mounted beside the releasing rod, two ends of the regulating bar are hung on the regulating part, and three pendant poles and an adjustable pole are arranged on the regulating bar; fixed armatures and moving armatures arranged relatively and provided with gaps therebetween are arranged between the regulating bar and the three conductors, the fixed armatures are fixedly installed on the conductors, and the lower parts of the moving armatures can be pivoted; the upper end of a tension spring is hung on the pendant poles while the lower end thereof is connected to the moving armatures; and the upper end of the adjustable pole extends into a groove at the lower part of a knob. In the utility model, airgaps are formed between the fixed armatures and the moving armatures, and the moving armatures move from the normal position to the fixed armatures to realize the releasing function when the current exceeds the corresponding threshold values, and different releasing currents can be obtained by adjusting the tension spring and the adjustable pole, therefore, the releasing action is reliable.
Description
Technical field
The utility model relates to a kind of low voltage electrical equipment, relates in particular to the trip gear of multipolar low-voltage circuit breaker, particularly relates to each and extremely goes up the device that all has magnetic dropout and heat dropout.
Background technology
Low-voltage circuit breaker is when detecting main circuit system and have overcurrent to pass through; its trip unit produces the action of threading off; play Circuits System and the effect such as each parts not impaired of protection in the main circuit; trip unit comprises magnetic trip unit and hot trip unit; the magnetic trip unit generally adopts lubricating cup formula or yoke formula structure; lubricating cup formula magnetic trip unit adopts goes up lower armature; spring is arranged between the armature; when short circuit current passed through, upper armature was inhaled, and made the release lever action; mechanism threads off; because the setting of magnetic trip unit is the threshold value of fixing, therefore can not adjust in use, do not have selectivity.Yoke formula magnetic trip unit is owing to structural restriction, and its gap or suffered spring force also are nonadjustable.Hot trip unit is because release lever axially not removable, causes the fixed distance between release lever and the bimetal leaf, and therefore, hot trip unit does not have selectivity yet.
Summary of the invention
The purpose of this utility model be to provide all have on a kind of each electrode one optionally magnetic thread off and thermal release device, realize the selective protection of low-voltage circuit breaker.
The technical solution adopted in the utility model is: comprise conductor, the insulation shell of three electrodes and be fixed on regulating part on the insulation shell, the dropout rod is installed on the insulation shell, at the other parallel installation adjuster rod of the rod of threading off, the two ends of adjuster rod are suspended on the regulating part, have three suspension member bars and an adjustable rod on the adjuster rod; It is relative and have the fixed armature and the moving armature in gap therebetween that the position respectively is set between adjuster rod and three conductors, and fixed armature is fixedly mounted on the conductor, and the bottom of moving armature can pivot; The extension spring upper end hangs on the suspension member bar, and the lower end is connected on the moving armature, and the adjustable rod upper end is stretched in the groove of knob bottom.
The spring force of extension spring is greater than the magnetic force that is produced by rated current between fixed armature and the moving armature and less than the magnetic force that is produced by short circuit current.
Energy storage mechanism one end links to each other with the rod of threading off, and the other end connects circuit breaker operation mechanism, and the bimetal leaf bottom is connected on the conductor, and top is near the rod of threading off, and the lower end of knob is stretched in the respective grooves of threading off on excellent 7.
The utility model increases fixed armature and moving armature on the basis of existing magnetic dropout and thermal release device, make between fixed armature and the moving armature and form air gap, when electric current surpasses respective thresholds, moving armature is just moved to realize tripping function to the fixed armature direction by resting position, simultaneously, can obtain different drop-away currents, the dropout reliable in action by regulating extension spring, adjustable rod etc.
Description of drawings
Below by the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is a three-dimensional structure diagram of the present invention;
Fig. 2 is the enlarged diagram that removes the selective release behind the insulation shell 10 among Fig. 1;
Fig. 3 is the part figure of an electrode trip gear among Fig. 2.
Among the figure: 1. conductor; 2. support; 3. moving armature; 4. fixed armature; 6. adjuster rod; 7. it is excellent to thread off; 8. knob; 9. knob; 10. insulation shell; 11. extension spring; 12. suspension member bar; 13. adjustable rod; 14. locking lever; 15. joystick; 16. expansion screw; 17. bimetal leaf; 19. energy storage mechanism; 23. regulating part.
Embodiment
As Fig. 1-2, low-voltage circuit breaker by the conductor 1 of three electrodes, insulation shell 10, regulating part 23 with and inner trip gear form, at load situation, breaker closing; In the dropout position, the contact automatic disconnection conductor 1 of low-voltage circuit breaker is used to carry the electric current that flows through each electrode, and the dropout rod 7 in the trip gear is installed in the bearing on the insulation shell 10, and rotates between load situation and dropout position.Energy storage mechanism 19 1 ends that have a striker link to each other with the rod 7 of threading off, and the other end connects circuit breaker operation mechanism, detect at trip gear that energy storage mechanism 19 makes the circuit breaker operation mechanism disconnection under the situation of short circuit current.Bimetal leaf 17 bottoms are riveted on the conductor 1, top is near the rod 7 of threading off, as overload current by and continue for some time after, conductor 1 is as 17 thermals source of bimetal leaf in the thermal release device, make bimetal leaf 17 heated bendings drive the rod 7 of threading off, and decontrol energy storage mechanism 19, make circuit breaker tripping.Stretch out outside the regulating part 23 on the top of knob 8, and the lower end of knob 8 is stretched in the respective grooves on the rod 7 of threading off, and when rotary knob 8, knob 8 drives the rod 7 of threading off and laterally moves, and when the rod 7 of threading off moves to ad-hoc location, just realizes optionally heat protection.
Shown in Fig. 2-3, at the rod 7 other parallel installation adjuster rods 6 of threading off, the two ends of adjuster rod 6 are suspended on the regulating part 23, this regulating part 23 is fixed on the insulation shell 10, adjuster rod 6 is the same with the rod 7 of threading off be positioned at three electrodes the magnetic trip gear above, have three suspension member bars 12 and an adjustable rod 13 on the adjuster rod 6.
Between adjuster rod 6 and three conductors 1 fixed armature 4 and moving armature 3 are set respectively, fixed armature 4 and moving armature 3 are oppositely arranged, and make between fixed armature 4 and the moving armature 3 and form the gap, and fixed armature 4 is fixedly mounted on the conductor 1.The bottom of moving armature 3 is installed in the breach of support 2 base portions of circuit breaker, make this breach form the rotating shaft of moving armature 3, realize the pivot structure of moving armature 3 bottoms, moving armature 3 can be done limited pivot, like this, just form electromagnetic field in the air gap of electric current in the conductor 1 between fixed armature 4 and moving armature 3, when current strength surpassed a predetermined dropout threshold values, moving armature 3 was just inhaled on the extremely surface of fixed armature 4.On moving armature 3 sides one expansion screw 16 is set, moving armature 3 is pressed against on the expansion screw 16, and this expansion screw 16 is used for adjusting the gap between moving armature 3 and the fixed armature 4.
Each electrode place all is provided with an extension spring 11, the upper end of extension spring 11 hangs on the suspension member bar 12, the lower end of extension spring 11 is connected on the moving armature 3, extension spring 11 is used to provide the restoring force of moving armature 3, and the resting position that moving armature 3 is biased into isolation is with the maximum air gap between the polar surface that obtains moving armature 3 and fixed armature 4.Adjustable rod 13 lower ends on the adjuster rod 6 connect adjuster rod 6, the upper end is stretched in the groove of knob 9 bottoms, stretch out outside the regulating part 23 on the top of knob 9, when rotary knob 9, moving adjustable rod 13 rotations of troughed belt on the knob 9, adjuster rod 6 just rotates, and makes the suspension member bar 12 on the adjuster rod 6 regulate extension spring 11, change the spring power of extension spring 11, realize that optionally magnetic is threaded off.On the rod 7 of threading off, have three joysticks 15, the upper end of joystick 15 connects the rod 7 of threading off, and it is other that the lower end is positioned at corresponding moving armature 3, and and moving armature 3 between have a predeterminable range, when moving armature 3 was inhaled on the polar surface of fixed armature 4 by magnetic force, moving armature 3 drove joystick 15.Also have a locking lever 14 on the rod 7 of threading off, the lower end of locking lever 14 connects on the rod 7 of threading off, and the upper end connects storage mechanism 19, is used for locking or decontrol energy storage mechanism 19 respectively in load situation and dropout position.
The course of work of the selectivity magnetic trip gear on above-mentioned each electrode is as follows:
Produce magnetic force by conductor 1 rated current in the air gap between fixed armature 4 and the moving armature 3, bigger with the pulling force design of extension spring 11 than this magnetic force, moving armature 3 is pressed on the expansion screw 16.The rod 7 of threading off keeps motionless on load situation, locking lever 14 locking devices.
When occurring in the conductor 1 under the situation of short circuit current, magnetic pull between fixed armature 4 and the moving armature 3 in the air gap is designed to the pulling force greater than extension spring 11, causes that moving armature 3 pivots to fixed armature 4 directions, in pivot motion course, extension spring 11 is stretched, and following two kinds of situations can occur after stretching:
If 1 short circuit current has disappeared in the line, the moving armature 3 that has extension spring 11 has stoped the continuation motion under the tension of extension spring 11, and moving armature 3 does not contact with joystick 15 on the rod 7 of threading off, and it is motionless that joystick 15 still keeps on load situation.
If 2 short circuit currents still exist, the magnetic pull in the air gap makes moving armature 3 continue to be pivoted to the final position, is pressed against on the polar surface of fixed armature 4., and making the rod 7 of threading off turn to the dropout position, locking lever 14 relieving mechanisms are with cut-off breaker.
In above-mentioned two kinds of situations, extension spring 11 works to stop moving armature 3, but when electric current one surpassed with extension spring 11 calibration respective thresholds, moving armature 3 was just moved to the final position by resting position, extension spring 11 is adjustable, and the calibration that adjuster rod 6 can be adjusted extension spring 11 obtains different drop-away currents.
Claims (6)
1. the selective release of a low-voltage circuit breaker, comprise conductor (1), the insulation shell (10) of three electrodes and be fixed on regulating part (23) on the insulation shell (10), it is characterized in that: the rod (7) of threading off is arranged on the insulation shell (10), at the other adjuster rod (6) that be arranged in parallel of the rod (7) of threading off, the two ends of adjuster rod (6) are suspended on the regulating part (23), have three suspension member bars (12) and an adjustable rod (13) on the adjuster rod (6); It is relative and have the fixed armature (4) and the moving armature (3) in gap therebetween that the position respectively is set between adjuster rod (6) and three conductors (1), and fixed armature (4) is fixedly mounted on the conductor (1), and the bottom of moving armature (3) is a pivot structure; Extension spring (11) upper end hangs on the suspension member bar (12), and the lower end is connected on the moving armature (3), and adjustable rod (13) upper end is stretched in the groove of knob (9) bottom.
2. the selective release of low-voltage circuit breaker according to claim 1 is characterized in that: the spring force of extension spring (11) is greater than the magnetic force that is produced by rated current between fixed armature (4) and the moving armature (3) and less than the magnetic force that is produced by short circuit current.
3. the selective release of low-voltage circuit breaker according to claim 1, it is characterized in that: energy storage mechanism (19) one ends link to each other with the rod (7) of threading off, the other end connects circuit breaker operation mechanism, bimetal leaf (17) bottom is connected on the conductor (1), top to be near the rod (7) of threading off, and the lower end of knob (8) is stretched in the respective grooves on the rod (7) of threading off.
4. the selective release of low-voltage circuit breaker according to claim 1, it is characterized in that: on the rod (7) of threading off, have three joysticks (15), it is other that joystick (15) lower end is positioned at corresponding moving armature (3), and and moving armature (have a predeterminable range between 30.
5. the selective release of low-voltage circuit breaker according to claim 1 is characterized in that: the lower end connection dropout rod (7) of locking lever (14), upper end connection storage mechanism (19).
6. the selective release of low-voltage circuit breaker according to claim 1 is characterized in that: on the expansion screw (16) by moving armature (3) is pressed against.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202343744U CN201503830U (en) | 2009-08-06 | 2009-08-06 | Selective releasing device for low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202343744U CN201503830U (en) | 2009-08-06 | 2009-08-06 | Selective releasing device for low-voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201503830U true CN201503830U (en) | 2010-06-09 |
Family
ID=42454759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202343744U Expired - Lifetime CN201503830U (en) | 2009-08-06 | 2009-08-06 | Selective releasing device for low-voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201503830U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630615B (en) * | 2009-08-06 | 2011-12-21 | 江苏辉能电气有限公司 | Selective release of low-voltage circuit breaker |
| CN104319201A (en) * | 2014-10-24 | 2015-01-28 | 大全集团有限公司 | Controllable double air gap electromagnetism tripping device |
| US10483065B2 (en) | 2016-12-30 | 2019-11-19 | Lsis Co., Ltd. | Molded-case circuit breaker for DC |
-
2009
- 2009-08-06 CN CN2009202343744U patent/CN201503830U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630615B (en) * | 2009-08-06 | 2011-12-21 | 江苏辉能电气有限公司 | Selective release of low-voltage circuit breaker |
| CN104319201A (en) * | 2014-10-24 | 2015-01-28 | 大全集团有限公司 | Controllable double air gap electromagnetism tripping device |
| US10483065B2 (en) | 2016-12-30 | 2019-11-19 | Lsis Co., Ltd. | Molded-case circuit breaker for DC |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100609 Effective date of abandoning: 20090806 |