CN1055175C - Device for anti-downrating of circuit breaker following fitting of auxiliary unit - Google Patents
Device for anti-downrating of circuit breaker following fitting of auxiliary unit Download PDFInfo
- Publication number
- CN1055175C CN1055175C CN95119789A CN95119789A CN1055175C CN 1055175 C CN1055175 C CN 1055175C CN 95119789 A CN95119789 A CN 95119789A CN 95119789 A CN95119789 A CN 95119789A CN 1055175 C CN1055175 C CN 1055175C
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- accessory
- thermal
- described device
- knob
- 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 - Fee Related
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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
Landscapes
- Breakers (AREA)
- Thermally Actuated Switches (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Measuring Fluid Pressure (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The thermal trip device of the multipole circuit-breaker requires readjustment after the introduction of an auxiliary device such as a differential protection device with an actuator aligned with a receiver. Electrical coupling is provided by conductors extending laterally from the base of the auxiliary with elbowed branches for connection to the circuit-breaker poles. Automatic readjustment is effected by a bar with a return spring and raised portions which impinge upon the bimetallic strips of the separate poles.
Description
The present invention relates to a kind ofly installing accessory; particularly the anti-rated performance of circuit breaker reduces device behind the such device of the moving protective device of aberration; this circuit breaker is provided with at least one and adjusts screw, to carry out the initial adjustment of thermal tripping device and the heat protection of qualification and the corresponding circuit breaker of its rated capacity.
After the dissipation of heat of the temperature rise of considering cable and this equipment itself, the antioverloading thermel protection device in the circuit breaker is located in the factory.
The dissipation of heat that is caused by Joule effect is that this heat is got rid of by feed cable by reaching with the contacted outer surface of surrounding air because the cause of internal resistance is arranged.When accessory has been installed; for example behind the differential protection; owing to get rid of the limitation of heat with the peculiar dissipation of heat of change in location, accessory of the minimizing of the contacted heat exchange surface of environment, output and the accessory by conductive wire cross-section and by feed cable, the balance of circuit breaker heat exchange obviously changed.Because this thermally equilibrated change, circuit breaker are in the tripping operation of overload initial stage and generally must reduce rated performance, so that regular protection to be provided continuously.
Can have various solutions to weaken this phenomenon, for example increase the accessory lead cross section, ventilation hole is set or heat shielding is installed.Yet these solutions are not very gratifying, and are particularly all the more so for the equipment of high rated performance.
The objective of the invention is to propose a kind of simple and effectively, the installing of automatic or manual mode the anti-rated performance of the circuit breaker behind the accessory reduce device.
For this purpose; the invention provides and a kind ofly reduce device assembling the anti-rated performance of the circuit breaker behind the accessory; this circuit breaker is provided with at least one and is used to carry out to thermal tripping device initial adjustment and limits adjustment screw with the protection of the corresponding circuit breaker heat of its rated capacity, and described anti-rated performance reduces device and comprises and be used for the device when having assembled accessory the thermal tripping device readjusted.
According to first embodiment, described to be used for the adjusting device that the thermal tripping device resets be hand gear.
In this case, be preferably in thermal conditioning knob of each extremely last assembling of circuit breaker.
According to second embodiment, described to be used for the adjusting device that the thermal tripping device resets be automatics.
In this case, circuit breaker preferably has the actuator at least one adjusting rod that is connected the thermal tripping device that also can act on circuit breaker on the accessory reliably.
Changed heat balance even the invention has the advantages that circuit breaker to install accessory, but, can not reduce the circuit breaker rated performance by the thermal tripping device is readjusted.
After the description and accompanying drawing thereof of only having read, understand the present invention and its major advantage as the preferred embodiment of limiting examples with will be more readily apparent from.Wherein:
Fig. 1 is the schematic diagram of the side of expression circuit breaker and the accessory of having installed apparatus of the present invention;
Fig. 2 is the schematic diagram of first embodiment of expression apparatus of the present invention;
Fig. 3 is the schematic diagram of second embodiment of expression apparatus of the present invention;
Fig. 4 is the detailed view of first embodiment of expression apparatus of the present invention;
Fig. 5 is the detailed view of second embodiment of expression apparatus of the present invention;
Fig. 6 is the schematic diagram of the circuit breaker that links to each other with two accessories of expression;
Fig. 7 A and 7B represent a conventional circuit breaker that the adjustment screw of thermal tripping device is housed;
The knob that Fig. 8 A and 8B represent that the above-mentioned circuit breaker of thermal conditioning knob is housed and be in formation apparatus of the present invention of primary importance before laser diode attachment auxiliary; With
The knob that Fig. 9 A and 9B represent that the above-mentioned circuit breaker of thermal conditioning knob is housed and be in formation apparatus of the present invention of the second place after laser diode attachment auxiliary.
With reference to Fig. 1, an accessory 10 of seeing from the side is used to be assemblied in the circuit breaker of also seeing from the side 11 as a differential protection.This servicing unit is provided with an actuator 12 that is used for automatism in receiving-member 13, and when accessory was assembled on the circuit breaker, this receiving-member was used for automatically readjusting being positioned at each thermal tripping device of extremely going up of circuit breaker.Actuator 12 is to be made of a projection that is emerging on the accessory side surface, and receiving-member 13 is made of a thermic devices adjusting rod, the end of this bar face be positioned on the circuit breaker side with the corresponding perforate 14 of described projection that constitutes actuator 12.
Fig. 2 is a sectional view, and its expression is used to receive the multipole circuit breaker 11 of the accessory 10 that is provided with actuator 12.The lead 15 that utilization is extended in the bottom transverse of servicing unit is electrically connected, and this lead has the branch road that can link to each other with breaker electrode by bend pipe.Thermal tripping device 16 comprises bimetal leaf 16a, 16b, 16c and the 16d that is connected respectively on each breaker electrode.Receiving-member 13 is made of the adjusting rod 17 with two bars, and these two bars are limited by boss 17a, 17b, 17c and the 17d of blistering wheel effect when affacting bimetal leaf 16a, 16b, 16c and 16d position.With the corresponding initial condition of circuit breaker of using unassembled accessory, bimetal leaf occupies the primary importance that is called as low level.Assembling the corresponding end-state of the circuit breaker behind the accessory with use, bimetal leaf occupies the second place that is called as a high position that is limited by boss 17a, 17b, 17c and 17d.Owing to increased accessory, the redistribution of heat exchange has been considered in this second position, it moves in the direction of arrow A by adjusting rod 17 and obtains, the motion of bar is to cause by the thrust that the actuator 12 that engages with perforate 14 applies, this actuator is identical with actuator among Fig. 1, and it withstands on the end of bar.This bar also comprises the support stop 18 of a return spring 19.When adjusting rod when primary importance moves to the second place, spring is compressed.If accessory is removed, because the effect of return spring 19, adjusting rod can be returned to its initial position.In this case, bimetal leaf is got back to the position that is called low level.In this embodiment, all boss 17a, 17b, 17c and 17d have identical size, particularly have identical height.Therefore, when loading onto accessory, concerning bimetal leaf to readjust for all utmost points of circuit breaker all be identical.
Can think that in this case setting up an accessory all is identical for the influence degree of all each utmost points.In practice, owing to set up accessory, make the heat balance of each utmost point different.In fact, if accessory is assemblied in a side of differential gear, what the then nearest utmost point was subjected to has the greatest impact.Just less with the influence that is subjected near the wall that opens circuit of the accessory utmost point far away.Above-mentioned optional embodiment shown in Figure 3 has considered this fact.In this case, adjusting rod 27 has boss 27a, 27b, 27c and the 27d that increases highly gradually from left to right in the drawings.Like this, according to bimetal leaf 16a, 16b, 16c and 16d and near the distance on the surface of the circuit breaker 11 of accessory 10 they are readjusted.As mentioned above, accessory is provided with and the actuator 12 that above the circuit breaker side plate perforate 14 of adjusting rod 27 ends is engaged.Utilize this embodiment can finish bimetal leaf by readjusting that the utmost point carries out.
Adjusting rod can act on bimetal leaf in a different manner.Among the embodiment shown in Figure 4, adjusting rod acts on the substrate or base plate of bimetal leaf.Bimetal leaf 30 is installed on the substrate 31 with U-shaped parts 32, and screw 33 is adjusted in one of a support plate 32a supporting of these U-shaped parts, and another support plate 32b is connected on the straight active blade 34 of bimetal leaf.The middle body of U-shaped parts 32 is installed on the supporting member 35, and this supporting member 35 can rotate around the stationary spindle 36 that is connected securely on the circuit breaker.The support plate 37 that is connected securely on this supporting member is pressed on the adjusting rod 38 on the one hand, is pushing away this bar by helical spring 39 on the other hand.Utilize to adjust the setting of 33 pairs of bimetal leafs of screw and tentatively adjust, this adjustment screw 33 is engaged on two nuts 40 and 41 of the support plate 32a both sides that are positioned at U-shaped parts 32.The end of this screw leans against on another support plate 32b of these parts.The main points of adjusting just are to change by rights two distances between the support plate.Can regulate the distance X between active blade 34 and the trip(ping) bar 42 under the overheated situation.The effect of adjusting rod 38 is to influence initial standoff distance x, and this distance is to form by the substrate of making by the bimetal leaf that rotates around axle 36.
Fig. 5 expresses another kind of mode of operation, and according to this mode, bar directly acts on the trip(ping) bar 50 under overheat condition, and no longer acts on the bimetal leaf.In this structure, the active blade 51 of bimetal leaf is connected on the curved substrate 52 securely.Adjust screw 53 and can adjust the initial distance x2 of the end of active blade at a distance of bar 50 by the angle that changes the elbow that is made of curved substrate 52, a support plate of camber blades 52 is connected on the Shell of circuit breaker securely, and another support plate is freely.Adjusting rod 54 affects the position of bar 50.If do not assemble accessory, this bar 50 is in by the represented position of dotted line, and active blade is x2 at a distance of the distance of this bar.When loading onto servicing unit, promoted adjusting rod and boss 55 (identical with 3 described contents), and made bar 50 move to the position shown in the dotted line with reference Fig. 2.In this position, this bar has changed at a distance of the distance of active blade, and this distance is x1.
Fig. 6 represents to be connected to an embodiment of the circuit breaker 11 on two accessory 10a and the 10b, and these two accessories all have an actuator 12a and 12b respectively.In this structure, circuit breaker must comprise two interactional adjusting rods, so that bimetal leaf is readjusted when new heat radiation poised state occurring having set up accessory.
When operating personnel were assembled to one or two accessory on the side of circuit breaker, all embodiment that bimetal leaf is readjusted carried out automatically.This automatic adjusting is because the interaction of the device on tripgear or the adjusting rod causes.Other embodiment can utilize manual mode to reach identical effect.
Provide different embodiment for reaching this purpose.Shown in Fig. 7 A and 7B, on double-pole cut-out 60, installed adjustment screw 61 in known manner.According to the rule that existing and manufacturer formulates, assembling is in factory, is producing termination ground, carrying out gathering with center conveyor or at the sellers place of official.This screw mainly acts on the base portion or the bottom of (but not only acting on) bimetal leaf.This adjustment screw is a kind of recessed hair style screw, and it has a cavity 62 that is used to receive manual hot scale knob 63 (as Fig. 8 A and 8B).Knob 63 is provided with a jut with groove surface, and it has and the cavity 62 corresponding to size and dimensions of adjusting screw 61, and like this, this knob just can be assembled on this adjustment screw.There is a cue mark front portion 65 of knob, as arrow 66 (seeing Fig. 8 A), for example when such unassembled accessory shown in Fig. 8 A, this mark is at initial position, again for example when accessory 67 has been assembled on the circuit breaker, with knob 1/4th circles, this mark is in the final position shown in Fig. 9 A.
In order to make protector, a cover plate 68 (dotting among the figure) can be installed, on the thermal conditioning knob this thermal conditioning knob is covered fully and prevent to use without permission this knob.This shelter is located at the end of each extremely set cavity of circuit breaker, and adjustment screw 61 and thermal conditioning knob 63 can be regulated.
Obviously, this thermal conditioning knob can be unloaded down from adjusting screw.In this case, the thermal conditioning knob acts on the bimetal leaf in some zones, and this zone is different from adjusts the deformed region that screw acted on.
For example, if adjust the bottom that screw acts on bimetal leaf, adjusting knob can act on straight initiatively propping up on the sheet, perhaps also can act on the trip(ping) bar as shown in Figure 5, and its position can utilize described knob and change.
Claims (18)
1, a kind ofly reduces device assembling the anti-rated performance of the circuit breaker behind the accessory; this circuit breaker is provided with at least one to be used to carry out to thermal tripping device initial adjustment and qualification and the hot adjustment screw of protecting of the corresponding circuit breaker of its rated capacity (11,60); it is characterized in that described anti-rated performance reduces device and comprises and be used for the device when having assembled accessory (10,67) the thermal tripping device readjusted.
According to the described device of claim 1, it is characterized in that 2, described to be used for the device that the thermal tripping device is readjusted be hand gear.
According to the described device of claim 2, it is characterized in that 3, described hand gear comprises and be contained in each thermal conditioning knob (63) of extremely going up of circuit breaker, this knob is arranged to the building block of described thermal tripping device that can each utmost point of operating breaker (60).
According to the described device of claim 3, it is characterized in that 4, described thermal conditioning knob (63) can act on the bimetal leaf of each utmost point of circuit breaker (60).
According to the described device of claim 3, it is characterized in that 5, described thermal conditioning knob (63) can act on the bar of the tripping mechanism that links to each other with the bimetal leaf of each utmost point of circuit breaker (60).
6, according to the described device of claim 3, it is characterized in that, described thermal conditioning knob (63) is contained in the corresponding primary importance of initial adjustment state of thermal tripping device when not assembling accessory, and is movable to and assembles the corresponding second place of the state of readjusting of this thermal tripping device behind the accessory.
According to the described device of claim 6, it is characterized in that 7, described thermal conditioning knob is rotating, it moves to corresponding to the second place of setting the anglec of rotation from primary importance.
According to the described device of claim 3, it is characterized in that 8, described thermal conditioning knob (63) is positioned at and is located at lip-deep housing of circuit breaker.
According to the described device of claim 8, it is characterized in that 9, described housing is provided with one and is used to hide the thermal conditioning knob, so that the cover plate that it is protected (68).
According to the described device of claim 1, it is characterized in that 10, the described device (63) that is used for the thermal tripping device is readjusted is an automatics.
11, according to the described device of claim 10, it is characterized in that, described automatics has at least one and is connected actuator on the accessory (12,12a, 12b) securely, and actuator can come the thermal tripping device is carried out described readjusting by acting on the receiving-member (13) that is connected securely on the circuit breaker.
According to the described device of claim 11, it is characterized in that 12, described actuator (12,12a, 12b) is made of the projection on the side plate that is emerging in accessory.
According to the described device of claim 11, it is characterized in that 13, described receiving-member (13) is made of thermal tripping device adjusting rod (17), an end face of bar facing on the circuit breaker side plate with the corresponding to perforate of described actuator (14).
According to the described device of claim 13, it is characterized in that 14, described adjusting rod (17) has boss (17a, 17b, 17c, 17d), they can with the position of each extremely corresponding thermal tripping bulking block of circuit breaker on play action of cam.
According to the described device of claim 14, it is characterized in that 15, the boss of adjusting rod (17) (17a, 17b, 17c, 17d) can act on respectively on the bimetal leaf (16a, 16b, 16c, 16d) of the thermal tripping device of each utmost point of circuit breaker.
16, according to the described device of claim 14, it is characterized in that boss (17a, 17b, 17c, the 17d of described adjusting rod (17); 27a, 27b, 27c, 27d) can act on respectively on the bar (42,50) of the tripping mechanism that links to each other with the bimetal leaf (16a, 16b, 16c, 16d) of each utmost point of circuit breaker.
According to the described device of claim 14, it is characterized in that 17, the height of described boss (17a, 17b, 17c, 17d) all equates.
According to the described device of claim 14, it is characterized in that 18, the height of described boss (17a, 17b, 17c, 17d) is unequal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9414477A FR2727567B1 (en) | 1994-11-28 | 1994-11-28 | ANTI-DEGRADING DEVICE IN CALIBRATION OF A CIRCUIT BREAKER FOLLOWING THE ADAPTATION OF AN AUXILIARY |
| FR9414477 | 1994-11-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1131804A CN1131804A (en) | 1996-09-25 |
| CN1055175C true CN1055175C (en) | 2000-08-02 |
Family
ID=9469394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95119789A Expired - Fee Related CN1055175C (en) | 1994-11-28 | 1995-11-28 | Device for anti-downrating of circuit breaker following fitting of auxiliary unit |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0715327B1 (en) |
| CN (1) | CN1055175C (en) |
| AT (1) | ATE202238T1 (en) |
| AU (1) | AU691989B2 (en) |
| DE (1) | DE69521273D1 (en) |
| FR (1) | FR2727567B1 (en) |
| RU (1) | RU2107354C1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3831120A (en) * | 1973-11-08 | 1974-08-20 | Gen Electric | Trip unit having improved trip adjustment indicator and circuit breaker incorporating same |
| US4148004A (en) * | 1977-05-04 | 1979-04-03 | Westinghouse Electric Corp. | Circuit breaker with calibrating means |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3950717A (en) * | 1975-02-21 | 1976-04-13 | Westinghouse Electric Corporation | Multi-pole circuit breaker with adjustable thermal trip unit |
| DE3812934A1 (en) * | 1988-04-19 | 1989-11-02 | Sursum Elektrizitaetsgesellsch | MULTI-PHASE CIRCUIT BREAKER |
| FR2641933B1 (en) * | 1988-12-23 | 1996-06-07 | Hager Electro | HOUSING FOR MODULAR ELECTRICAL APPLIANCES AND SHUTTERING DEVICE FOR SUCH A HOUSING |
-
1994
- 1994-11-28 FR FR9414477A patent/FR2727567B1/en not_active Expired - Fee Related
-
1995
- 1995-10-16 AT AT95410119T patent/ATE202238T1/en not_active IP Right Cessation
- 1995-10-16 EP EP95410119A patent/EP0715327B1/en not_active Expired - Lifetime
- 1995-10-16 DE DE69521273T patent/DE69521273D1/en not_active Expired - Lifetime
- 1995-11-24 AU AU39070/95A patent/AU691989B2/en not_active Ceased
- 1995-11-27 RU RU95120246A patent/RU2107354C1/en active
- 1995-11-28 CN CN95119789A patent/CN1055175C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3831120A (en) * | 1973-11-08 | 1974-08-20 | Gen Electric | Trip unit having improved trip adjustment indicator and circuit breaker incorporating same |
| US4148004A (en) * | 1977-05-04 | 1979-04-03 | Westinghouse Electric Corp. | Circuit breaker with calibrating means |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69521273D1 (en) | 2001-07-19 |
| EP0715327A1 (en) | 1996-06-05 |
| AU3907095A (en) | 1996-06-06 |
| RU2107354C1 (en) | 1998-03-20 |
| FR2727567B1 (en) | 1997-01-03 |
| EP0715327B1 (en) | 2001-06-13 |
| ATE202238T1 (en) | 2001-06-15 |
| AU691989B2 (en) | 1998-05-28 |
| FR2727567A1 (en) | 1996-05-31 |
| CN1131804A (en) | 1996-09-25 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |