CN210429703U - Overload alarm non-tripping molded case circuit breaker - Google Patents
Overload alarm non-tripping molded case circuit breaker Download PDFInfo
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- CN210429703U CN210429703U CN201921606950.3U CN201921606950U CN210429703U CN 210429703 U CN210429703 U CN 210429703U CN 201921606950 U CN201921606950 U CN 201921606950U CN 210429703 U CN210429703 U CN 210429703U
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- draw bar
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Abstract
An overload alarm non-tripping molded case circuit breaker comprises a shell, an operating mechanism, an arc extinguish chamber, a fixed contact, a contact system, a handle and an overload alarm non-tripping module; the overload alarm non-tripping module comprises a bracket, a shaft, an alarm traction rod, a torsion spring, an adjusting nut, a locking nut, a set screw and a microswitch; the bracket is provided with independent clamping grooves corresponding to three phases, the upper part of the inner side plate of the independent clamping grooves at two ends is fixed with a shaft, an alarm traction rod is erected between the two shafts, and the outer side of any shaft is sleeved with a torsion spring; the top of the bimetallic strip of three phases all uses lock nut fixed set screw, and the upside of warning traction lever upwards extends to be equipped with the clearance around the opening of establishing outside set screw, and adjusting nut is installed to set screw's outer end, and the downside of warning traction lever sets up the warning push rod, and micro-gap switch installs the below at the warning push rod. The utility model discloses do not change original moulded case circuit breaker structure, do not change former bimetallic strip bending direction, realize the modularization installation, have simple structure compactness, simple installation, low cost and the reliable advantage of action.
Description
Technical Field
The utility model relates to a low voltage distribution electrical apparatus field specifically is an overload is reported to police and is not taken off and detain moulded case circuit breaker.
Background
The molded case circuit breaker can automatically cut off the current after the current exceeds the trip setting. The plastic shell is a plastic insulator used as a shell of the device and used for isolating conductors from each other and grounding metal parts. The molded case circuit breaker with the overload alarm non-tripping function is mainly applied to a low-voltage power system, is used in special places such as fire fighting, medical treatment, chemical engineering and the like, can output an overload alarm signal in time while continuously meeting the requirement of uninterrupted continuous power supply when overload faults occur in a circuit and tripping is not allowed, arouses the attention of an operator to real-time load of the circuit, and simultaneously avoids the major loss of personnel or equipment property caused after power failure.
In the prior art, a bimetallic strip in a molded case circuit breaker with an overload alarm non-tripping function generally adopts a backward bending method, and has higher requirement on space. The principle of the overload alarm tripping device is that when the line current is tripped by overcurrent, the bimetallic strip starts to work and bends in a specified direction, so that a normally open contact of a microswitch is closed and an overload signal is output, and the microswitch is connected with a peripheral alarm circuit to realize the overload alarm tripping-free function of the thermomagnetic molded case circuit breaker.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides an overload alarm does not drop moulded case circuit breaker, adopts the modularization installation, accurately realizes reporting to the police and does not drop the function to require lowly to the space.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
an overload alarm non-tripping molded case circuit breaker comprises a shell, an operating mechanism, an arc extinguish chamber, a static contact, a contact system, a handle and an overload alarm non-tripping module, wherein the operating mechanism is connected with and controls a tripping traction rod to act; the overload alarm non-tripping module comprises a connecting plate, a conductor, an armature, an iron core, a magnetic tripping spring and a bimetallic strip bent towards the direction of a tripping traction rod during overcurrent; the overload alarm non-tripping module also comprises a bracket, a shaft, an alarm traction rod, a torsion spring, an adjusting nut, a set screw and a microswitch; the support is fixed on the outer side of a tripping draw bar of the operating mechanism in the shell, the support is provided with three independent clamping grooves corresponding to three phases, opposite shafts are fixed on the upper parts of inner side plates of the independent clamping grooves at two ends, and an alarm draw bar is arranged between the two shafts; a torsion spring is sleeved outside any one shaft, one end of the torsion spring is fixed on the side plate on the corresponding side, and the other end of the torsion spring is connected with the alarm traction rod; the top of the bimetallic strip of three phases corresponds alarm traction rod one side and all fixes holding screw, and the upside of alarm traction rod upwards extends to be equipped with the clearance around establishing the opening outside holding screw, and the adjusting nut that is used for adjusting alarm time is installed to the outer end of holding screw, and the downside downwardly extending of alarm traction rod sets up the alarm push rod, and micro-gap switch installs the below at the alarm push rod.
Above-mentioned overload warning does not detain moulded case circuit breaker, and the further improvement lies in: holes penetrating through the shafts are formed in the two ends of the alarm draw bar, the alarm draw bar is fixed on the support through the shafts, and limiting structures for limiting excessive rotation of the alarm draw bar to limit excessive bending of the bimetallic strip are arranged on the side plates of the independent clamping grooves.
Above-mentioned overload warning does not detain moulded case circuit breaker, and the further improvement lies in: the set screw is fixed on the bimetallic strip through the locking nut.
Above-mentioned overload warning does not detain moulded case circuit breaker, and the further improvement lies in: a U-shaped groove is formed in a side plate of the middle independent clamping groove, the alarm traction rod is clamped in the U-shaped groove, and an annular partition plate structure is arranged on the alarm traction rod corresponding to the U-shaped groove.
Above-mentioned overload warning does not detain moulded case circuit breaker, and the further improvement lies in: the upper part of the tripping traction rod structure of the operating mechanism is processed into a cylindrical surface structure for preventing the bimetallic strip from being bent and tripped corresponding to the position where the bimetallic strip is bent and pointed by overcurrent.
Above-mentioned overload warning does not detain moulded case circuit breaker, and the further improvement lies in: the micro switch is positioned on a side plate of the independent clamping groove on any side, and the wiring of the micro switch bypasses the bottom of the bracket and is led out of the outer side of the shell from the side surface.
Above-mentioned overload warning does not detain moulded case circuit breaker, and the further improvement lies in: the upper side of the alarm traction rod is of an inclined strip plate structure provided with a long hole, and the lower side of the alarm traction rod is provided with a vertical section and a horizontal section.
By adopting the technical scheme, the utility model, have the effect of following technological progress:
the utility model discloses do not change former thermomagnetic type moulded case circuit breaker structure, overall dimension and mounting dimension, do not change the crooked direction of bimetallic strip simultaneously, under the condition that does not change most spare parts, do not change original punching press and welding process, only increase a small amount of spare parts, adopt the modularization installation, accurately realize the overload and report to the police not function of breaking out, and alarming function can satisfy the anti time limit characteristic of the long delay of transshipping reliably. The structure is simple and convenient to mount, low in space requirement and capable of saving production cost. The utility model has the advantages of simple and compact structure, simple installation, low cost and reliable action.
The utility model discloses the moulded case circuit breaker of the relevant model of series arc-quenching cover cooperation, extensively be suitable for and install at rated current 800A and below, exchange 50HZ, in each series switch board, drawer cabinet, the electric box below rated operating voltage 440V, satisfy special places that fire control, medical treatment and chemical industry etc. can not cut off the power supply when taking place overload fault, when the overload fault appearing, the circuit breaker still can be in reliable combined floodgate state, the accurate overload alarm signal that continuously exports simultaneously.
Drawings
FIG. 1 is a schematic view of the main structure of the present invention;
FIG. 2 is a schematic view of the overload alarm non-tripping module of the present invention;
fig. 3 is another angle schematic diagram of the overload alarm no-trip module of the present invention;
fig. 4 is a side sectional view of the overload alarm no-trip module of the present invention.
In the drawings, the reference numerals denote: 1. bimetallic strip, 2, bracket, 3, connecting plate, 4, alarm draw bar, 5, locking nut, 6, set screw, 7, adjusting nut, 8, tripping draw bar, 10, microswitch, 11, electromagnetic system bracket, 12, shaft, 13, torsion spring, 14, wire outlet, 15, armature, 16, conductor, 17, iron core, 18, thermal element, 19, operating mechanism, 20, arc extinguish chamber, 21, contact system, 22, handle, 23, static contact, 24, shell, 25 and wiring groove.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and embodiments:
the utility model relates to a moulded case circuit breaker is not detained in overload warning, as shown in fig. 1, including plastic casing 24, the upside is equipped with explosion chamber 20, contact system 21, static contact 23, handle 22 and operating device 19 in the shell, and the downside in the shell is equipped with the overload warning module of not tripping with the below of the dropout traction lever 8 that operating device links to each other.
As shown in fig. 2-4, the overload alarm non-tripping module comprises an electromagnetic system, a bracket 2, a shaft 12, an alarm traction rod 4, a torsion spring 13, a locking nut 5, a set screw 6, an adjusting nut 7 and a microswitch 10. The electromagnetic system of the overload alarm non-tripping module comprises a connecting plate 3, a conductor 16, an armature 15, an iron core 17, a magnetic tripping spring and a bimetallic strip 1 which is bent towards the direction of a tripping traction rod during overcurrent.
The support 2 is made of high-temperature-resistant flame-retardant materials, the support 2 forms independent clamping grooves corresponding to A, B, C three phases respectively through the combination of the bottom plate and the side plates, electromagnetic systems of the three phases are installed in the three independent clamping grooves, the installation of the electromagnetic systems is consistent with that of the prior art, the connecting plate 3 is located on the outermost side, and the bimetallic strip 1 is installed on one side close to the tripping traction rod 8.
The alarm traction rod 4 is provided with a middle shaft bracket, an upper traction part and a lower alarm push rod part. The upper parts of the inner side plates of the independent clamping grooves at the two ends are fixed with shafts 12 with the diameter of 15mm, the two ends of the alarm traction rod 4 are provided with holes for the shafts to penetrate, and the side plate of the clamping groove in the middle is correspondingly provided with a U-shaped groove for the alarm traction rod 4 to penetrate; two ends of a shaft bracket of the alarm traction rod 4 are penetrated with shafts 12, and the middle part is erected in a U-shaped groove. And the alarm draw bar is provided with an annular partition plate structure corresponding to the U-shaped groove and used for axially limiting the alarm draw bar and preventing interphase short circuit. The shaft 12 of the phase A is sleeved with a torsion spring 13, one end of the torsion spring 13 is fixed on a side plate of the independent clamping groove of the phase A, and the other end of the torsion spring is connected with the alarm traction rod 4. The torsion spring provides a force for the alarm traction rod to rotate oppositely to the bending direction of the bimetal, so that the alarm traction rod can reset and prevent the alarm traction rod from causing the micro switch to malfunction under the vibration condition.
An alarm push rod is arranged on the lower side of the alarm traction rod 4 corresponding to the phase C, and is provided with a downward vertical section and a horizontal section vertical to the downward vertical section. The microswitch 10 is positioned on the independent clamping groove side plate of the C phase, and the wiring of the microswitch bypasses the bottom of the bracket and is led out of the outer side of the shell from the side surface.
The upper part of the tripping draw bar 8 structure of the operating mechanism corresponding to the position where the bimetallic strip 1 is bent by overcurrent is processed into a cylindrical surface structure for preventing the bimetallic strip from being bent and tripped.
The utility model discloses the during operation, as shown in fig. 4, when producing overcurrent, bimetallic strip is crooked right, and adjusting nut drives the warning traction lever and rotates right simultaneously, drives the warning push rod when the warning traction lever rotates and touch micro-gap switch, sends alarm signal. The utility model discloses get rid of the material, the position processing that will drop the traction lever and correspond with the bimetallic strip is cylindrical, avoids prior art because vertical lateral wall structure causes the interference with the bimetallic strip. Under normal conditions, the bimetallic strip bends to enable the alarm traction rod to rotate, and after the microswitch is triggered, the limit of the alarm traction rod enables the bimetallic strip to stop bending, so that the trip traction rod cannot be touched. Under the extreme abnormal condition, even if the bimetallic strip bends rightwards and touches the tripping traction rod, the bimetallic strip also applies pressure to the tripping traction rod, so that the bimetallic strip cannot rotate, and the operating mechanism cannot be tripped. The tripping draw bar only provides instant tripping protection and is used by a tripping button or an accessory, and under the condition of short circuit, the armature acts to enable the tripping draw bar to rotate, the operating mechanism acts and the circuit breaker is tripped.
Claims (7)
1. An overload alarm non-tripping molded case circuit breaker comprises a shell (24), an operating mechanism (19) connected with and controlling a tripping draw bar (8) to act, an arc extinguish chamber (20), a static contact (23), a contact system (21), a handle (22) and an overload alarm non-tripping module; the overload alarm non-tripping module comprises a connecting plate (3), a conductor (16), an armature (15), an iron core (17), a magnetic tripping spring and a bimetallic strip (1) which is bent towards a tripping traction rod (8) during overcurrent; the method is characterized in that: the overload alarm non-tripping module also comprises a bracket (2), a shaft (12), an alarm traction rod (4), a torsion spring (13), an adjusting nut (7), a set screw (6) and a microswitch (10); the support (2) is fixed on the outer side of a tripping draw bar (8) of the operating mechanism in the shell, the support (2) is provided with three independent clamping grooves corresponding to three phases, opposite shafts (12) are fixed on the upper parts of inner side plates of the independent clamping grooves at two ends, and an alarm draw bar (4) is arranged between the two shafts (12); a torsion spring (13) is sleeved on the outer side of any shaft (12), one end of the torsion spring is fixed on the side plate on the corresponding side, and the other end of the torsion spring is connected with the alarm traction rod (4); the top of the bimetallic strip (1) of three phases corresponds to one side of the alarm traction rod and is all fixed with a set screw (6), the upper side of the alarm traction rod (4) extends upwards to be provided with a gap around an opening arranged outside the set screw (6), the outer end of the set screw (6) is provided with an adjusting nut (7) used for adjusting alarm time, the lower side of the alarm traction rod (4) extends downwards to be provided with an alarm push rod, and a microswitch (10) is arranged below the alarm push rod.
2. The overload alarm no-trip molded case circuit breaker according to claim 1, wherein: holes penetrating through the shafts are formed in the two ends of the alarm draw bar (4), the alarm draw bar is fixed on the support through the shafts, and limiting structures for limiting excessive rotation of the alarm draw bar (4) so as to limit excessive bending of the bimetallic strip are arranged on side plates of the independent clamping grooves.
3. The overload alarm no-trip molded case circuit breaker according to claim 2, wherein: the set screw (6) is fixed on the bimetallic strip (1) through the locking nut (5).
4. The overload alarm no-trip molded case circuit breaker according to claim 3, wherein: a U-shaped groove is formed in a side plate of the middle independent clamping groove, the alarm draw bar (4) is clamped in the U-shaped groove, and an annular partition plate structure is arranged on the alarm draw bar corresponding to the U-shaped groove.
5. The overload alarm no-trip molded case circuit breaker according to claim 1, wherein: the upper part of the tripping draw bar (8) structure of the operating mechanism is processed into a cylindrical surface structure for preventing the bimetallic strip from being buckled in a bending way corresponding to the position where the bimetallic strip is bent and pointed by overcurrent.
6. The overload alarm no-trip molded case circuit breaker according to claim 1, wherein: the microswitch (10) is positioned on a side plate of the independent clamping groove on any side, and the wiring of the microswitch (10) bypasses the bottom of the bracket and is led out of the outer side of the shell from the side surface.
7. The overload alarm no-trip molded case circuit breaker according to claim 1, wherein: the upper side of the alarm draw bar (4) is of an inclined strip plate structure provided with a strip hole, and the alarm push rod at the lower side of the alarm draw bar (4) is provided with a vertical section and a horizontal section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921606950.3U CN210429703U (en) | 2019-09-25 | 2019-09-25 | Overload alarm non-tripping molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921606950.3U CN210429703U (en) | 2019-09-25 | 2019-09-25 | Overload alarm non-tripping molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210429703U true CN210429703U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921606950.3U Active CN210429703U (en) | 2019-09-25 | 2019-09-25 | Overload alarm non-tripping molded case circuit breaker |
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| Country | Link |
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| CN (1) | CN210429703U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115101389A (en) * | 2022-08-24 | 2022-09-23 | 江苏凯隆电器有限公司 | Magnetic trip alarm device of molded case circuit breaker |
-
2019
- 2019-09-25 CN CN201921606950.3U patent/CN210429703U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115101389A (en) * | 2022-08-24 | 2022-09-23 | 江苏凯隆电器有限公司 | Magnetic trip alarm device of molded case circuit breaker |
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