CN2231830Y - Double-magnetic starter - Google Patents
Double-magnetic starter Download PDFInfo
- Publication number
- CN2231830Y CN2231830Y CN 95200180 CN95200180U CN2231830Y CN 2231830 Y CN2231830 Y CN 2231830Y CN 95200180 CN95200180 CN 95200180 CN 95200180 U CN95200180 U CN 95200180U CN 2231830 Y CN2231830 Y CN 2231830Y
- Authority
- CN
- China
- Prior art keywords
- contactor
- main
- contact
- phase
- motor
- 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
Links
Landscapes
- Motor And Converter Starters (AREA)
Abstract
The utility model relates to a phase interruption protector for motors, particularly a protector for small-sized motors. The utility model provides a simple double-magnetic starter, which is composed of two contactors, the coil of a main contactor is connected between a phase A and a phase B by the contact points of an auxiliary contactor, the three main contact points of the main contactor are connected with the main circuit of a motor, the coil of the auxiliary contactor is connected between the normally opened press-button and the normally closed press-button of the start switch of an external circuit in series, the fuse is connected between a phase C and a midline, the auxiliary contact point of the main contactor is connected with the normally opened press-button of the start switch in parallel, the lack phase protection and the phase interruption protection for the motor are realized, and the motor can not be burned out.
Description
The utility model relates to a kind of open-phase protection device for electromotor, particularly relates to the protective device of miniature motor.
Existing electic protection has short circuit, overcurrent, decompression and kind such as under-voltage.
Motor is protected scarce in addition, open phase protection.Overload is mainly made in scarce, the phase failure of large and medium-sized motor to be handled, so use the overtemperature relay protection to get final product, but thermal relay have specific overload inert and operate time constant, the capacity of this two tops parameter and motor is inversely proportional to, be that capacity is more little, its overload time constant is big more, and inert is big more, and the overload capacity of miniature motor is very little; And people relatively pay attention to the distribution of large and medium-sized motor, and adopt single main line or branch line, single control cubicle, and safeguard measure is more perfect.And miniature motor is generally not too paid attention to, it is mixed distribution often, normal and illumination, single-phase welding machine mix in one network, use a public distribution board.This distribution board is made house lead in the disconnecting link of fusible link often, and it is the isolation disconnect, is again short circuit, the overload protection of circuit.In case certain relative ground circuit, fusible link promptly fuses, and therefore, miniature motor is that Lou sees not bright because of phase-deficient operation burns.
The purpose of this utility model be to provide a kind of at the motor network in case lack, promptly outage is anxious automatically stops or be not activated in the phase failure, the starter that is not burnt with timely protection motor.
The utility model is to be combined by two A.C. contactors, and the pull-in winding voltage of main contactor K is 380V, has three main contacts (often opening) K at least
1, K
2, K
3With more than one auxilliary contact (often opening) K
4, the pull-in winding voltage of auxiliary contactor J is 220V, and a contact (often opening) J is arranged
1The pull-in winding of main contactor K is through the contact J of auxiliary contactor
1Be connected to (as A and B phase) between line its main contact K
1, K
2, K
3Be connected on the motor major loop; The pull-in winding of auxiliary contactor J has been connected in series start button (often opening) D
1And stop botton (normally closed) D
2Be connected to alternate (relatively), auxilliary contact (the often opening) K of main contactor K as C
4And the startup that is connected in the auxiliary contactor loop meets button D
1On.When initial condition, main and auxiliary contactor K and J (the contact K that all do not power
1, K
2, K
3, K
4And J
1All obstructed, main and auxiliary contactor loop no current passes through), feeder line is not powered to motor.When power supply is normal, press start button D
1, fusible link, the start button D of C phase power supply in the auxiliary contactor loop
1With stop botton D
2To auxiliary contactor J coil power supply, contact J
1Adhesive, A, B phase power supply are to main contactor K coil power supply, contact K
1, K
2, K
3, K
4All adhesives, motor powered operation, the self-locking of auxiliary contactor loop.When pressing stop botton D
2, auxiliary contactor J coil losing electricity, contact J
1Discharge main contactor K coil losing electricity, contact K
1, K
2, K
3And K
4Discharge, motor breaks away from power supply and shuts down.
When A, B have phase fusible link fusing, main contactor K coil losing electricity, contact K mutually
1, K
2, K
3And K
4Discharge, motor breaks away from power supply and shuts down; As the fusing of C phase fusible link, auxiliary contactor J coil losing electricity, contact J
1Discharge main contactor K coil losing electricity, contact K
1, K
2, K
3And K
4All discharge, cut off motor power, motor has been realized open phase protection.
Power supply any one does not have electricity mutually before starting, and then the utility model can guarantee and will not start, and does not have electricity mutually as A or B, and the main contactor loop does not power, main contact K
1, K
2And K
3Not adhesive, motor runs out of; Do not have electricity mutually as C, the auxiliary contactor loop does not power, its contact J
1Not adhesive, the main contactor loop does not also have electricity, main contact K
1, K
2And K
3Also not adhesive, motor run out of electricity equally, have realized the open-phase protection to motor.
The utility model compared with the prior art its advantage is:
(1) adopt simple main and auxiliary contactor combination to realize normal production and life have been safeguarded in the practical protection of the lacking of miniature motor, the phase failure;
(2) save a large amount of motor maintenance costs.
Description of drawings
Fig. 1 be the utility model with external circuit be connected electrical schematic diagram (being electric principle part of the present utility model in the dotted line)
Embodiment
The utility model is made up of two A.C. contactors, and the pull-in winding voltage of main contactor K is 380V, and three main contacts (often opening) K is arranged
1, K
2, K
3With two auxilliary contacts (often opening) K
4, K
5, the pull-in winding voltage of auxiliary contactor J is 220V, and a contact (often opening) J is arranged
1The pull-in winding of main contactor K is through the contact J of auxiliary contactor
1Be connected to (as A and B phase) between line its main contact K
1, K
2, K
3Be connected on the motor major loop; The pull-in winding of auxiliary contactor J has been connected in series start button (often opening) D
1, stop botton (normally closed) D
2Be connected to alternate (relatively) with fusible link, auxilliary contact (the often opening) K of main contactor K as C
4And the startup that is connected in the auxiliary contactor loop meets button D
1On, another auxilliary contact K
5Receive on the power supply by an indicator light.When initial condition, main and auxiliary contactor K and J all do not power, contact K
1, K
2, K
3, K
4, K
5And J
1All obstructed, main and auxiliary contactor loop no current passes through), feeder line is not powered to motor M, and indicator light does not work.When power supply is normal, press start button D
1, fusible link, the start button D of C phase power supply in the auxiliary contactor loop
1With stop botton D
2To auxiliary contactor J coil power supply, contact J
1Adhesive, A, B phase power supply are to main contactor K coil power supply, contact K
1, K
2, K
3, K
4, K
5All adhesives, motor M powered operation, the self-locking of auxiliary contactor loop, indicator light is bright.When pressing stop botton D
2, auxiliary contactor J coil losing electricity, contact J
1Discharge main contactor K coil losing electricity, contact K
1, K
2, K
3, K
4, K
5Discharge, motor M breaks away from power supply and shuts down.
When A, B have phase fusible link fusing, main contactor K coil losing electricity, contact K mutually
1, K
2, K
3, K
4And K
5Discharge, motor M breaks away from power supply and shuts down; As the fusing of C phase fusible link, auxiliary contactor J coil losing electricity, contact J
1Discharge main contactor K coil losing electricity, contact K
1, K
2, K
3And K
4, K
5All discharge, cut off motor power, M has realized open phase protection to motor.
Still what one does not have electricly power supply mutually before starting, and then the utility model can guarantee and will not start, and does not have electricity mutually as A or B, and the main contactor loop does not power, main contact K
1, K
2And K
3Not adhesive, motor runs out of; Do not have electricity mutually as C, the auxiliary contactor loop does not power, its contact J
1Not adhesive, the main contactor loop does not also have electricity, main contact K
1, K
2And K
3Also not adhesive, motor M runs out of electricity equally, has realized the open-phase protection to motor.
Claims (1)
1. a two magnetic actuator is made up of A.C. contactor, it is characterized in that:
1. combined by a main contactor K and an auxiliary contactor J, the pull-in winding voltage of main contactor K is 380V, has at least three often to open main contact K
1, K
2, K
3Assist contact K with more than one often opening
4, the pull-in winding voltage of auxiliary contactor J is 220V, and a normal opened contact J is arranged
1
2. the pull-in winding of main contactor K is through the contact J of auxiliary contactor
1Be connected between line and line, be serially connected with start button D in the pull-in winding of auxiliary contactor J and the external circuit
1With stop botton D
2Be connected between phase and center line;
3. the main contact K of main contactor K
1, K
2, K
3Be connected on the motor M major loop auxilliary contact K
4And the startup that is connected in the auxiliary contactor loop meets button D
1On.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 95200180 CN2231830Y (en) | 1995-01-06 | 1995-01-06 | Double-magnetic starter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 95200180 CN2231830Y (en) | 1995-01-06 | 1995-01-06 | Double-magnetic starter |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2231830Y true CN2231830Y (en) | 1996-07-24 |
Family
ID=33854011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 95200180 Expired - Fee Related CN2231830Y (en) | 1995-01-06 | 1995-01-06 | Double-magnetic starter |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2231830Y (en) |
-
1995
- 1995-01-06 CN CN 95200180 patent/CN2231830Y/en not_active Expired - Fee Related
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 |