CN2270303Y - Three-phase open-phase protector - Google Patents
Three-phase open-phase protector Download PDFInfo
- Publication number
- CN2270303Y CN2270303Y CN 96217649 CN96217649U CN2270303Y CN 2270303 Y CN2270303 Y CN 2270303Y CN 96217649 CN96217649 CN 96217649 CN 96217649 U CN96217649 U CN 96217649U CN 2270303 Y CN2270303 Y CN 2270303Y
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- CN
- China
- Prior art keywords
- phase
- relay
- input
- housing
- normally open
- 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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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a three-phase open-phase protector. The utility model is composed of a housing and input ends 2 and 3, an output end and a relay J which are arranged on the housing; the input ends 2 and 3 which are connected with the phase A and the phase B of a three-phase power supply are connected with a relay attracting coil, the normally open contact J < 1 > of the relay J is connected with the input end (2), the other end of the normally open contact J < 1 > of the relay J is connected with the output end 5 which is connected with a control loop, and the control loop is connected with the phase C of the three-phase power supply. The utility model has the advantages of simple structure, high economy, convenient maintenance, strong anti-interference ability, strong anti-shock ability, small size, light weight, high sensitivity, high reliability, no unwanted operation, no action rejecting, short protecting breaking time, no noise, no vibration, etc.
Description
The utility model belongs to the three-phase alternating current open phase protection.
The anti-interference open-phase solid-state protector of electronic type that the 3rd phase of nineteen ninety-five " low-voltage electrical apparatus " is introduced and No. 19 disclosed a kind of rectification, filtering, voltage stabilizing circuit of comprising of patent gazette the 10th volume; relatively the phase failure protector CN2164605Y of amplifying circuit and control circuit composition exists anti-surge ability low; need use zero line during use; the control capacity is little, shortcoming such as the long and inconvenient maintenance of break-time under the semi-load malfunctions.Patent gazette the 12nd volume discloses a kind of contacts of contactor and contactor control circuit that is connected on the power line that comprise No. 2, feature is that this contact is two groups of normally opened contacts and controlled by two control circuits, first control circuit is connected to wherein two-phase, it constitutes button, contactor coil and normally opened contact thereof, it is mutually arbitrary with other that second control circuit is connected to another phase, it constitutes button, contactor coil, and its shortcoming is that structure is complicated, poor reliability.
The purpose of this utility model provides a kind of simple and reasonable, and work is sensitive reliable, the three-phase phase failure protector that overload capacity is strong.
The purpose of this utility model is achieved in that a kind of three-phase phase failure protector; its primary structure is that it is made up of the relay J that is provided with in the input 2,3, output 5 and the housing that are provided with on housing, the housing; be connected relay normally open contact J with the two-phase A of three phase mains, input that B is connected 2,3 with pulling relay coil
1Be connected normally open contact J with input 2
1The other end be connected with output 5, output 5 is connected with control loop, another of control loop and three phase mains C mutually links to each other.
The input 1 of C connection mutually with three phase mains is set on the housing, and input 1 is connected with output 4, and output 4 is connected with control loop.Normally open contact J
1Or be connected with input (3).
Because the utility model adopts the relay J monomer to constitute; play the effect of open phase protection threephase load; have simple in structurely, economical, use easy to maintenancely, anti-interference anti-surge ability is strong; volume is little; in light weight, work is sensitive, reliable, not malfunction, not tripping; the protection break-time is short, advantages such as noiselessness and vibration.
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is circuit theory diagrams of the present utility model.
Among the figure: A, B, C: three phase mains, HK: unit switch, RD: fuse, RJ: thermal relay, 1,2,3: phase failure protector input terminal, 4,5: phase failure protector outlet terminal, J: relay coil, J
1: normally open contact, TA: stop button, QA: starting button, C
3: ac contactor coil, C
1: A.C. contactor main contact, C
2: A.C. contactor is assisted normally open contact.
Its operation principle is as follows:
The three-phase phase failure protector is made of the relay J monomer, and input 1 is connected with output 4, and input 2,3 is connected with pulling relay coil, and an end of relay normally open contact is connected with input 2, and the other end of normally open contact is connected with protector output 5.It is made up of the relay J that is provided with in the input 1,2,3 that is provided with on housing, the housing, output 4,5 and the housing, input 1 and three phase mains one mutually C connect, input 1 is connected with output 4, the input that is connected with in addition two-phase A, the B of three phase mains 2,3 is connected relay normally open contact J with pulling relay coil
1Be connected normally open contact J with input 2
1The other end be connected with output 5.Relay normally open contact J
1Or be connected with input 3.Control loop comprises ac contactor coil C
3, thermal relay RJ, stop button TA, starting button QA be composed in series, the auxiliary normally opened contact of A.C. contactor is in parallel with starting button QA, the control loop two ends are output 4,5, A.C. contactor main contact C
1Be connected with three-phase power line.
Three phase mains connects protector input terminal 1,2,3 during use, output is connected with control loop, after the combination HK closure, not during phase shortage, relay coil energising adhesive, the normally opened contact closure, control loop board preparation work state is pressed starting button QA, the adhesive of main contactor coil electricity, auxiliary often opening and main contact head closure, main circuit is connected, threephase load work; When appointing a scarce phase time, lack A or B phase time, relay coil loses voltage and discharges, the relay normally open contact disjunction, thus cut off control loop, after institute's phase shortage is recovered normally, relay adhesive work, control loop is in the preparation work state.When scarce C phase time, though relay adhesive work, the main contactor coil does not have operating voltage; be in release condition; after institute's phase shortage was recovered normally, control circuit was in the preparation work state, because this three-phase phase failure registered mail device is simple in structure; so improved the reliability of open phase protection greatly; have noiselessly, anti-surge ability is strong, and volume is little; in light weight; easy to install, work is sensitive reliable, not malfunction; not tripping; the open phase protection break-time is short, noiselessness and vibration, long-term, short-term operation; practical, energy consumption is low.
Claims (3)
1, a kind of three-phase phase failure protector; it is characterized in that it is made up of the relay J that is provided with in the input that is provided with on housing, the housing (2,3), output (5) and the housing; the input (2,3) that is connected with the two-phase (A, B) of three phase mains is connected relay normally open contact J with pulling relay coil
1Be connected normally open contact J with input (2)
1The other end be connected with output (5), output (5) is connected with control loop, another of control loop and three phase mains (C) mutually links to each other.
2, three-phase phase failure protector according to claim 1 is characterized in that on the housing being provided with the input (1) of (C) connection mutually with three phase mains, and input (1) is connected with output (4), and output (4) is connected with control loop.
3, three-phase phase failure protector according to claim 1 is characterized in that relay normally open contact J
1Or be connected with input (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96217649 CN2270303Y (en) | 1996-07-23 | 1996-07-23 | Three-phase open-phase protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96217649 CN2270303Y (en) | 1996-07-23 | 1996-07-23 | Three-phase open-phase protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2270303Y true CN2270303Y (en) | 1997-12-10 |
Family
ID=33898730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96217649 Expired - Fee Related CN2270303Y (en) | 1996-07-23 | 1996-07-23 | Three-phase open-phase protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2270303Y (en) |
-
1996
- 1996-07-23 CN CN 96217649 patent/CN2270303Y/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 |