CN2528099Y - Heat overload relay for electric machine underphase-preventing protection - Google Patents
Heat overload relay for electric machine underphase-preventing protection Download PDFInfo
- Publication number
- CN2528099Y CN2528099Y CN01280693U CN01280693U CN2528099Y CN 2528099 Y CN2528099 Y CN 2528099Y CN 01280693 U CN01280693 U CN 01280693U CN 01280693 U CN01280693 U CN 01280693U CN 2528099 Y CN2528099 Y CN 2528099Y
- Authority
- CN
- China
- Prior art keywords
- switching mechanism
- overload relay
- moving
- bimetal piece
- moving member
- 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 - Lifetime
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 118
- 238000005452 bending Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000018199 S phase Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
- H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
- H01H83/223—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with bimetal elements
-
- 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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/16—Electrothermal mechanisms with bimetal element
Landscapes
- Breakers (AREA)
- Thermally Actuated Switches (AREA)
Abstract
Disclosed is a thermal overload relay for motor phase missing protection, which can control the rotating angle of the a release lever, add application range according to the application conditions and prevent the release lever from moving caused by external vibration so as to increase the reliability. The thermal overload relay comprises that: an actuating mechanism is provided with a heating coil, and produces driving power when vortex or phase missing happens; a bimetallic part is bended by the heat of the heating coil; a switch module connects or cuts off a circuit between a power source and a load depending on the driving power of the actuating mechanism; a conversion mechanism module transfers the driving power of the actuating mechanism to the switch module, and is comprises an upper moving part and a lower moving part which move toward the direction opposite to each other through the bending or recovery stress of the bimetallic part when the vortex or the phase missing happens; a conversion mechanism rod rotates according to the linear moving of the two moving parts; a temperature compensating bimetallic part; a cam pushes the temperature compensating bimetallic part to rotate with the conversion mechanism rod together when the conversion mechanism rod rotates.
Description
Technical field
This novel thermal overload relay that relates to, it is used for the motor underphase-preventing protection, and is particularly related to such thermal overload relay, and the opereating specification of relay can be according to the service condition adjustment, and can improve the reliability corresponding to the operation of external vibration.
Background technology
Usually, in three phase alternating current motor, there is three-phase current (R phase, S phase and T are mutually) to flow through.If one in this three-phase mutually or two-phase cut off for a certain reason, so overload current focus on remaining those mutually or that mutually in, and motor may burn.
The thermal overload relay that is used for the motor underphase-preventing protection is the thermal overload relay that has motor underphase-preventing protection function or prevent to produce the overload current function.
Fig. 1 is a calcspar, has shown the thermal overload relay of above-mentioned prior art, and it is used for the motor underphase-preventing protection.
According to the thermal overload relay that is used for the motor underphase-preventing protection of prior art, it comprises cabinet 102; Actuating mechanism 104 is connected on three terminals 110, and described terminal is enclosed in the cabinet 102, and correspondingly is connected on the three-phase alternating-current supply, and when producing overload current or owing phase time, this actuating mechanism produces driving power; Switching mechanism assembly 106 is enclosed in the auxiliary cabinet 103, and described auxiliary cabinet 103 is placed on the top of cabinet 102, by the driving power of actuating mechanism 104, makes circuit conversion between power supply and the load to the position of closing of circuit or open circuit; With switching mechanism assembly 108, be used for driving power is delivered to switching mechanism assembly 106 from actuating mechanism 104.
The lower end of adjusting connector 105 is by the rotating shaft support, thereby can rotate on two walls of auxiliary cabinet 103, and the bottom of adjusting connector 105 is supported by leaf spring 113.Cam turntable 109 and adjustment connector 105 are devices of adjusting thermal overload relay operation susceptibility; when phase or overload current are owed in generation; the anti-phase of owing of protection motor; rotating cam rotating disk 109, and the left direction in Fig. 1 moves the hinge axis 103 of adjusting connector, described hinge axis 103 closes on cam turntable 109; then; just usually open the gap turn narrow between movable contact 117 and the release lever 118, thus, 118 pairs of overload currents of release lever are operated very sensitively.Thus, even corresponding to the overload current that has difference hardly with normal level, switching mechanism 120 also can cut off circuit by the rotation of release lever 118.
On the contrary, cam turntable 109 rotations, and the hinge axis 103 of adjusting connector moves to the right direction of Fig. 1, the hinge axis 103 of described adjustment connector is near cam turntable 109, then, the gap of often opening between movable contact 117 and the release lever 118 increases, and release lever 118 is operated lentamente corresponding to overload current.Thus, corresponding to the overload current that has difference hardly with normal level, switching mechanism 120 does not cut off circuit, because the anglec of rotation of release lever 118 reduces.
Normally closed moving contact 125 is attached on the free terminal of normally closed movable contact 129, and normally closed movable contact 129 made by leaf spring, and when having normal current to flow through in the circuit, spring is placed on the pressing component of indicating arm bottom and pushes.
Fig. 2 is a cutaway view, has shown a switching mechanism assembly according to prior art, and Fig. 3 is the figure of demonstration according to the mode of operation of the switching mechanism assembly of prior art.Switching mechanism assembly according to prior art will be described with reference to figure 2 and 3 in the back.
Existing switching mechanism assembly 106 comprises: go up the top that moving member 130 is placed on cabinet 102, and when bimetal piece 114 bendings, last moving member 103 linear moving; Following moving member 132 is placed on the lower surface of moving member 130 and slides linear moving when bimetal piece 114 turns back to the home position; Switching mechanism bar 134, the projection by last moving member 130, and connect down moving member 132 and rotate, be used for moving according to upper and lower moving member 130 and 132 opposite linearities, promote temperature-compensating bimetal piece 107.
Here, last moving member 130 comprises: three contact projections 150, contact with a side surface of described three bimetal piece 114, and provide predetermined gap therebetween; Protrusion pin 152 is to switching mechanism bar 134 projections, and described switching mechanism bar 134 is provided at a side.
Following switching mechanism bar 132 comprises: three contact projections 154 contact with the opposite side surface of described three bimetal piece 114; Bar mounting portion 156 is provided at the bottom, and described switching mechanism bar 134 is pushed and rotates.
According to the anti-thermal overload relay of phase of owing of prior art protection motor, when producing overload current, heater coil 112 heating, and bimetal piece 114 bendings.Go up moving member 130 rotation switching mechanism bars 134 then, the right direction in figure slides, and the jut 164 of switching mechanism bar 134 promotes temperature-compensating bimetal piece 107.In addition, be connected to release lever 134 rotations on the temperature-compensating bimetal piece 107, thus console switch mechanism 120, and circuit is cut off thus.
In addition, in electric current, produce and owe phase time, in these three bimetal piece, produce the bimetal piece of owing phase and turn back to reset condition at motor.And the left direction of following switching mechanism bar 132 in Fig. 2 slides, and 134 rotations of switching mechanism bar.
Yet according to the anti-thermal overload relay of phase of owing of prior art protection motor, the anglec of rotation of release lever is only determined by the displacement of bimetal piece that the anglec of rotation of release lever can not be adjusted according to the circuitry cuts condition thus, and the scope of application is limited.
Equally, the temperature-compensating bimetal piece is connected to each other with the switching mechanism bar and linear the contact, thus, when relay vibrates, produce on the release lever that is connected to the temperature-compensating bimetal piece and move, and operating reliability reduces.
The utility model content
Thus; this novel purpose provides a kind of thermal overload relay that is used for the motor underphase-preventing protection; described cam is installed between switching mechanism assembly and the release lever; thus, the operand power of switching mechanism assembly is passed on the release lever by the rotation of cam; the scope of application according to service condition can increase thus; because the anglec of rotation of release lever can be controlled according to the shape of cam, and by preventing release lever, so reliability can increase because external vibration moves.
Purpose in order to realize that this is novel as embodiment and general description, provides thermal overload relay as here, is used for the motor underphase-preventing protection, and it comprises:
Actuating mechanism has: heater coil produces driving power when producing overload current or owing phase time; And bimetal piece, depend on the heating of heater coil and bending;
Switch module depends on the driving power of actuating mechanism, makes closing of circuit or open circuit between power supply and the electrical load; With
The switching mechanism assembly, its driving power with actuating mechanism is delivered on the switch module,
It is characterized in that the switching mechanism assembly comprises: go up moving member and following moving member, when producing overload current or owing phase time, by the bending or the restoring force of bimetal piece, they are linear moving on opposite directions; The switching mechanism bar by last moving member and the support of following moving member and rotate, moves according to the linearity of two moving members and to rotate; The temperature-compensating bimetal piece depends on the rotation of switching mechanism bar and rotates; And cam, when the switching mechanism bar rotates, promote the temperature-compensating bimetal piece and rotate with the switching mechanism bar.
From the specific descriptions of the novel back of basis that connection with figures is carried out, this novel front and other purpose, characteristics, scheme and advantage will become more obvious.
Description of drawings
Description of drawings this novel embodiment, and be used from principle of explaining that this is novel with text description one, described accompanying drawing is used for this novel further understanding, and is attached in this explanation, and constitutes the part of this specification.
In the accompanying drawings,
Fig. 1 is a calcspar, has shown the thermal overload relay of prior art, is used for the motor underphase-preventing protection;
Fig. 2 is a cutaway view, has shown the switching mechanism assembly of prior art;
Fig. 3 is a calcspar, has shown according to this novel thermal overload relay, is used for the motor underphase-preventing protection;
Fig. 4 is a cutaway view, has shown according to this novel switching mechanism assembly;
Fig. 5 is the figure that shows according to the mode of operation of this novel switching mechanism assembly.
Embodiment
Now will be concrete example shown in reference to the accompanying drawings describe this novel preferred embodiment in detail.
A plurality of embodiment according to this novel thermal overload relay are arranged, be used for the motor underphase-preventing protection, now will describe most preferred embodiment.
Fig. 3 is a calcspar, has shown according to this novel thermal overload relay, is used for the motor underphase-preventing protection.
The thermal overload relay that is used for the motor underphase-preventing protection comprises: cabinet 2; Actuating mechanism 4 is connected on three terminals 10, and described three terminals 10 are enclosed in the cabinet 2, and are connected on the three-phase alternating-current supply, produces actuating force when producing overload current or owing phase time; Switching mechanism assembly 6 is enclosed in the auxiliary cabinet 3, by the actuating force of actuating mechanism 4, the circuit between power supply and the electrical load is changed between the position of closed or open circuit, and described auxiliary cabinet 3 is placed on the top of cabinet 2; With switching mechanism assembly 8, be used for the actuating force of actuating mechanism 4 is delivered to switching mechanism assembly 6.
Actuating mechanism 4 comprises three heater coils 12, and they are connected on each of three terminals 10 separately, and described three terminals 10 are connected on the three-phase alternating-current supply, is used for heating when producing overload current; With three bimetal piece 14, their installation makes heater coil 12 twine on it, and the upper end of bimetal piece 14 is closed on switching mechanism assembly 8, by bending switching mechanism assembly 8 is moved when heater coil 12 heating, and owes phase time and turn back to the home position when producing.
Switching mechanism assembly 6 comprises: release lever 20, and the linearity that it depends on switching mechanism assembly 8 moves and rotates; Switching mechanism according to the rotation of release lever 20, makes open circuit or closure between power supply and the circuit load; Hinge axis 27 is used to support release lever 20 and rotates; Adjust connector 28, be used to adjust the position of hinge axis 27; Cam turntable 35 by adjusting connector 28 rotations, is adjusted the position of hinge axis 27; With reset key 24, when producing overload current or owing phase time, make switching mechanism turn back to the home position, described switching mechanism is operated by release lever 20.
Release lever 20 is installed, and it is supported by hinge axis 27 and rotates, and temperature-compensating bimetal piece 30 is connected on the release lever 20 by screw, and described temperature-compensating bimetal piece 30 moves according to the linearity of switching mechanism assembly 8, and clockwise or be rotated counterclockwise.
The lower end of adjusting connector 28 is rotated axle support, and rotation on auxiliary cabinet 3, and the part of adjustment connector 28 is supported by leaf spring.Cam turntable 35 and adjustment connector 28 are devices of adjusting thermal overload relay operation sensitiveness, and when phase or overload current were owed in generation, the protection motor prevented owing phase.When cam turntable 25 rotation and when the left direction of Fig. 3 moves the hinge axis 27 of adjusting connector 28, described adjustment connector 28 closes on cam turntable 35, release lever 20 is operated sensitively corresponding to overload current, because often open the gap turn narrow between movable contact 22 and the release lever 20.Thus, corresponding to the overload current that almost has little difference with normal level, switching mechanism cuts off circuit by the rotation of release lever 20.
On the contrary, when cam turntable 35 rotations, and the right side in Fig. 3 is when moving the hinge axis 27 of adjusting connector 28, described adjustment connector 28 is often opened the gap between movable contact 22 and the release lever 20 near cam turntables 35, and release lever 20 is operated lentamente corresponding to overload current, switching mechanism does not cut off circuit thus, because corresponding to the overload current that allows, the anglec of rotation of release lever 20 reduces, the overload current of described permission and normal level almost have little difference.
Switching mechanism comprises often leaves fixed contact 44; Often open moving contact 42, it is placed on the end portion often opening movable contact 22, and can be transformed into the position of contact fixed contact 44, with the position of separating with fixed contact 44; Normally closed fixed contact 40; Normally closed moving contact 38, it is placed on the free terminal part of normally closed fixed contact, and can be transformed into the position of contact fixed contact 40, with the position of separating with fixed contact 40; With spring 36, be installed in and often open on the movable contact 22, provide elastic force to often opening movable contact 22 to the direction of separating with fixed contact 44.By two plate-shaped springs are put together, form and often open movable contact 22, and if apply pressure greater than predeterminated level, can be around mid portion reverse centering in the longitudinal direction.
An end portion often opening movable contact 22 is fixed on the terminal, and when the pressure pushed greater than predeterminated level, moving contact 42 adheres to another end portion on it thus, around mid portion reverse centering in the longitudinal direction.
Normally closed moving contact 38 is attached on the free terminal of normally closed movable contact 39 part, and normally closed movable contact 39 comprises leaf spring, and when having normal current to flow through on the circuit, its pressing component by being placed on display pole 46 bottoms is to lower compression.
Switching mechanism assembly 6 further comprises indicating arm 46, is used for the mode of operation of sense switch mechanism, and to outside indication rotation brake mode of operation.Indicating arm 46 is connected on the end portion often opening movable contact 22, and according to the open circuit of often opening movable contact 22 or make position, by the vertical moving of direction up or down, at the state that indicating circuit connects or cuts off that covers of auxiliary cabinet.
Reset key 24 is to make switching mechanism turn back to the device in home position, described switching mechanism moves to the circuitry cuts position, just often open moving contact 42 and often to open fixed contact 44 separated from one another, and normally closed moving contact 38 and normally closed fixed contact 40 positions connected to one another.The installation of an end portion of reset key 24 makes the loam cake upper process at auxiliary cabinet 3, and the installation of another end portion makes to close on and often opens fixed contact 44.
The reset operation that uses reset key 24 is with following description.When the user promoted reset key 24, another end portion of reset key 24 was to lower compression fixed contact 44.Then, the moving contact 42 that is connected on the fixed contact 44 is pushed downwards, and it is reverse often opening half part that moving contact 22 has moving contact 42 in the longitudinal direction thus.Fixed contact 44 is separated from one another with moving contact 42, is connected to the indicating arm of often opening on the movable contact 22 46 and moves vertically downward, thus, pushes normally closed moving contact 38 downwards by the press element that is connected to indicating arm 46 bottoms.Thus, the normally closed fixed contact 40 of normally closed moving contact 38 contacts, and finish reset operation.
Will be according to this novel switching mechanism assembly with reference to figure 4 following descriptions.
Described switching mechanism assembly comprises: goes up moving member 50, is placed on the upside of cabinet 2 and slides, and when producing overload current, linear mobile by the bending of bimetal piece 14; Following moving member 52 is placed on down on the lower surface of moving member 50 and slides, and owe phase time when producing, and the rightabout of the part 50 that moves up slides, and bimetal piece turns back to the home position; Switching mechanism bar 54 is supported by upper and lower moving member 50 and 52, moves according to the linearity of upper and lower moving member 50 and 52 and rotates; With cam 61, its installation closes on temperature-compensating bimetal piece 30, and is connected on the switching mechanism bar 54, when 54 rotations of switching mechanism bar, promotes temperature-compensating bimetal piece 30, with 54 rotations of switching mechanism bar.
Last moving member 50 comprises: three contact projections 58, and a surface of bimetal piece 14 is in contact with it, therebetween the predetermined distance of projection; With supporting pin 60, be used to support switching mechanism bar 54, be arranged on the position of moving member 50.
Following moving member 52 comprises: three contact projections 68, and another surface of bimetal piece 14 is in contact with it; With hinge protrusions 70, be provided at the bottom of projection 68 rotatably, switching mechanism bar 54 inserts described.
In addition, on the lower surface of following moving member 52, provide a plurality of direction protrusions, reduced friction when the lower surface of moving member 52 contacts the lower surface of going up moving member 50 instantly, and can slide smoothly.
Switching mechanism bar 54 comprises: hinge recess 80, be used to receive joint pin 70, and described joint pin 70 is formed on the bottom of switching mechanism bar 54; Supporting projections 82 is inserted and is gone up moving member 60, and the described moving member 60 of going up is used for switching mechanism bar 54 is connected with cam 61 at a surperficial upper process and connecting pin 84, and in the rotation of the top of switching mechanism bar 54.
The mid portion of cam 61 is inserted into joint pin 90, and described joint pin 90 rotates from auxiliary cabinet 3 upper process, and the curvature portion of cam 61 contact temperature-compensating bimetal piece 30.In addition, cam 61 comprises slotted hole 92, and slotted hole 92 has predetermined length, extends to curvature portion from the centre part.
Here, and mobile in the longitudinal direction, described connecting pin 84 is connected on the switching mechanism bar 54 in the connecting pin 84 insertion slotted holes 92.
Just, when switching mechanism bar 54 rotation, the connecting pin 84 of cam 61 moves along slotted hole 92, and cam 61 rotates by switching mechanism then, and curvature portion 97 promotes temperature-compensating bimetal piece 30.
Cam 61 can as levels of current, move corresponding to other cam with different-diameter or size curved surface according to service condition, starts the circuitry cuts operation of thermal overload relay.Just, under the bigger situation of the curved surface diameter of cam 61, the anglec of rotation of temperature-compensating bimetal piece 30 increases, thus corresponding to the circuit that flows on the circuit with owe mutually executive circuit rupturing operation sensitively.
Operation according to this novel thermal overload relay will be described as the back, and described thermal overload relay is used for the motor underphase-preventing protection.
Fig. 5 is the figure that shows according to the mode of operation of this novel release lever assembly.
When producing eddy current on the motor, heater coil 12 heating, and bimetal piece 14 bendings.Then, the right direction of last moving member 50 in Fig. 5 slides, and rotates switching mechanism bar 54 to counter clockwise direction.In addition, the electric current that flows on motor produces and owes phase time, in these three bimetal piece, produce the bimetal piece of owing phase and turn back to the home position, and moving member 52 slides to the left direction of Fig. 5 down, and switching mechanism bar 54 is also to rotation counterclockwise.
When switching mechanism bar 54 rotates, insert switching mechanism bar 54 upper end connecting pins 84 and move along slotted hole 92, cam 61 rotates to counter clockwise direction thus, and the curved surface 97 of cam rotates temperature-compensating bimetal piece 30 to counter clockwise direction.
Here, the shape and size of cam 61 can change, and the anglec of rotation of switching mechanism bar 54 can Be Controlled.
Then, release lever 20 is to rotation counterclockwise, and the mid portion that will often open movable contact 22 is in the longitudinal direction to lower compression.In addition, often open the part of the movable contact 22 that moving contact 42 adheres to, rapidly oppositely, then, often open moving contact 42 and Chang Kai fixed contact 44 to contact with each other, simultaneously, be connected to the indicating arm 46 of often opening movable contact 22 and rise by the compression of spring 36.Thus, the downward pressure that is placed on the compression member on the indicating arm 46 is released, and described indicating arm 46 is used for normally closed movable contact, and thus, the normally closed movable contact that leaf spring is made turns back to the home position.Thus, be attached to the normally closed moving contact 38 of normally closed movable contact free terminal part, separate with normally closed fixed contact point 40, and cut off the electricity supply and load between circuit.At this moment, the circuitry cuts state of thermal overload relay has been indicated in the rising of indicating arm 46 to the user.
As mentioned above; according to protect the anti-thermal overload relay of phase of owing of motor according to this novel being used to; cam is installed between switching mechanism bar and the temperature-compensating bimetal piece; and when the switching mechanism bar rotates; cam is followed the rotation of switching mechanism bar and is rotated, and promotes the temperature-compensating bimetal piece.Thus, the anglec of rotation of release lever can be adjusted according to the change of cam face, and opereating specification can enlarge.
Equally, the rotation transmission of operand power by cam thus, can prevent release lever because the moving of external vibration, and the reliability of thermal overload relay can improve.
Do not breaking away from following novel can enforcement in a variety of forms of this novel design and principal character, should also be appreciated that, unless special provision, the foregoing description is not limited by previously described any details, but appended claims defined it design and scope in extensively constitute, thus, fall into institute in claims boundary line and the scope and change and revise, perhaps fall in the boundary line that is equal to and the scope change and modification is included in appended claims.
Claims (4)
1. be used for the thermal overload relay of underphase-preventing protection motor, comprise:
Actuating mechanism, it has heater coil, when producing overload current or owing phase time, produces driving power; With the heating that depends on heater coil and crooked bimetal piece;
Switch module depends on the driving power of actuating mechanism, with closing of circuit between power supply and the electrical load or open circuit; With
The switching mechanism assembly, its driving power with actuating mechanism is delivered on the switch module,
It is characterized in that the switching mechanism assembly comprises: go up moving member and following moving member, when producing overload current or owing phase time, by the bending or the restoring force of bimetal piece, they are linear moving on opposite directions; The switching mechanism bar by last moving member and the support of following moving member and rotate, moves according to the linearity of two moving members and to rotate; The temperature-compensating bimetal piece depends on the rotation of switching mechanism bar and rotates; And cam, when the switching mechanism bar rotates, promote the temperature bimetal piece and rotate with the switching mechanism bar.
2. according to the thermal overload relay of claim 1, it is characterized in that described switching mechanism bar comprises: accept the hinge recess of joint pin, joint pin is located at down the bottom of switching mechanism bar; The projection of switching mechanism bar in the insertion is used for from last moving member received power; And the through hole that receives connecting pin, connecting pin couples together switching mechanism bar and cam.
3. according to the thermal overload relay of claim 1 or 2, it is characterized in that described cam comprises: the slotted hole that receives the connecting pin that slides; With the curvature portion that closes on the temperature-compensating bimetal piece.
4. according to the thermal overload relay of claim 3, it is characterized in that described slotted hole is placed on the core of described cam, wherein said joint pin is inserted to described curvature portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR37083/2000 | 2000-12-29 | ||
| KR2020000037083U KR200226336Y1 (en) | 2000-12-29 | 2000-12-29 | Trip for open phase protection type thermal over load relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2528099Y true CN2528099Y (en) | 2002-12-25 |
Family
ID=34056715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01280693U Expired - Lifetime CN2528099Y (en) | 2000-12-29 | 2001-12-29 | Heat overload relay for electric machine underphase-preventing protection |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR200226336Y1 (en) |
| CN (1) | CN2528099Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364509B (en) * | 2007-08-07 | 2011-04-20 | Ls产电株式会社 | Method for adjusting trip sensitivity of thermal overload protection apparatus |
| CN101364508B (en) * | 2007-08-07 | 2012-01-25 | Ls产电株式会社 | Thermal overload trip apparatus and method for adjusting trip sensitivity thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101276923B1 (en) * | 2011-12-30 | 2013-06-19 | 엘에스산전 주식회사 | Thermal overload relay |
-
2000
- 2000-12-29 KR KR2020000037083U patent/KR200226336Y1/en not_active IP Right Cessation
-
2001
- 2001-12-29 CN CN01280693U patent/CN2528099Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364509B (en) * | 2007-08-07 | 2011-04-20 | Ls产电株式会社 | Method for adjusting trip sensitivity of thermal overload protection apparatus |
| CN101364508B (en) * | 2007-08-07 | 2012-01-25 | Ls产电株式会社 | Thermal overload trip apparatus and method for adjusting trip sensitivity thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR200226336Y1 (en) | 2001-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107910228B (en) | A kind of high voltage direct current relay | |
| CN208157335U (en) | A kind of operating mechanism and breaker of breaker | |
| CN100421201C (en) | Split thermomagnetic adjustable release device for circuit breaker | |
| CN201408720Y (en) | Electrical overload relay with contact bridge | |
| CN203103245U (en) | Circuit breaker tripping mechanism capable of adjusting short-circuit instantaneous setting current | |
| CN2528099Y (en) | Heat overload relay for electric machine underphase-preventing protection | |
| US5566818A (en) | Movable contactor device in circuit breaker | |
| CN101515522A (en) | Thermal overload relay | |
| CN101010767A (en) | Circuit breaker | |
| CN201392791Y (en) | Molded case circuit breaker | |
| CN101763992B (en) | Thermomagnetic tripper | |
| US7236082B2 (en) | Circuit breaker structure | |
| CN1087748A (en) | Disconnect | |
| CN109449064B (en) | Electromagnetic trip device and circuit breaker | |
| CN201298474Y (en) | Microswitch | |
| CN201594512U (en) | Thermo magnetic type tripper | |
| EP1988557B1 (en) | Electrical switch | |
| CN2891264Y (en) | Separated thermo-magnetic adjustable releaser for breaker | |
| CN111564333A (en) | Spring operating mechanism of pole-mounted switch | |
| CN108987138A (en) | Electrical contact system | |
| CN209804553U (en) | Energy regulator | |
| CN208014624U (en) | High voltage direct current relay with microswitch | |
| CN1606114A (en) | Switch device | |
| CN2582146Y (en) | Heat overload relay | |
| CN2509706Y (en) | Thermal overload relay for protecting phase-defect of motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111229 Granted publication date: 20021225 |