CN2280378Y - Three-phase circuit break automatic protector - Google Patents
Three-phase circuit break automatic protector Download PDFInfo
- Publication number
- CN2280378Y CN2280378Y CN 96248807 CN96248807U CN2280378Y CN 2280378 Y CN2280378 Y CN 2280378Y CN 96248807 CN96248807 CN 96248807 CN 96248807 U CN96248807 U CN 96248807U CN 2280378 Y CN2280378 Y CN 2280378Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- bridge rectifier
- electromagnetic relay
- current transformer
- series
- 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
- 230000001012 protector Effects 0.000 title claims abstract description 7
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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Abstract
The utility model relates to a three-phase automatic protector that opens circuit, it includes casing and working circuit, its characterized in that working circuit has the three current transformer that concatenates in proper order mutually, bridge rectifier circuit, electromagnetic relay and bidirectional thyristor, the three current transformer overlaps the periphery of arranging the three power cord passageway of casing in respectively, three current transformer's series circuit's both ends are connected with bridge rectifier circuit's input, electromagnetic relay is connected with bridge rectifier circuit's output, it normally opens contact J1-1And the resistor R is connected between the control electrode and the cathode of the bidirectional controllable silicon after being connected in series. The device has the advantages of simple structure, sensitive action and reliable work.
Description
The utility model relates to a kind of three-phase automatic protector that opens circuit.
Notification number is that the utility application specification of CN2063308U has been put down in writing a kind of three-phase automatic protector that opens circuit, and its shortcoming is a complex structure, thereby easy break-down, the cost height.
The purpose of this utility model is that a kind of three-phase automatic protector that opens circuit will be provided, and it is simple structure not only, and is active in one's movements, reliable operation.
The utility model is to constitute like this, it comprises the housing with three power line passages and is located at the interior operating circuit of housing, it is characterized in that operating circuit has three current transformers that are connected in series mutually successively, output is connected with the bridge rectifier of filter capacitor C, electromagnetic relay and in order to be external in the bidirectional triode thyristor in the control loop, three current transformers are placed on the periphery of three power line passages of housing respectively, the two ends of the series circuit of three current transformers are connected with the input of bridge rectifier, electromagnetic relay is connected with the output of bridge rectifier, its normal opened contact J
1-1Be connected between the control utmost point and negative electrode of bidirectional triode thyristor after resistance R is connected.
When the utility model met any one of three phase mains at work and mutually the phase failure takes place, the sampled signal voltage of bridge rectifier input sharply changed, electromagnetic relay dead electricity, its normal opened contact J
1-1Disconnect, bidirectional triode thyristor ends, thereby can be at the control loop of instantaneous trip power consumption equipment.In addition, circuit of the present utility model is simpler, so reliable operation, fault is few.
Below in conjunction with drawings and Examples the utility model is specifically described.
Fig. 1 is external view of the present utility model (3 are outer terminal among the figure)
Fig. 2 is a working circuit diagram of the present utility model.
Fig. 3 uses the circuit diagram that the utility model prevents the motor open-phase running.
With reference to accompanying drawing, the utility model comprises the housing 1 with three power line passages 2 and is located at this interior operating circuit of shell, it is characterized in that, operating circuit has three current transformer L1, the L2, the L3 that are connected in series mutually successively, output is connected with the bridge rectifier of filter capacitor C, electromagnetic relay J and in order to be external in the bidirectional triode thyristor in the control loop.Three current transformer L1, L2, L3 are placed on the periphery of three power line passages of housing respectively, and the two ends of the series circuit of three current transformers are connected with the input of bridge rectifier, its normal opened contact J
1-1Be connected between the control utmost point and negative electrode of bidirectional triode thyristor after resistance R is connected, two outer terminals 3 of bidirectional triode thyristor on housing are serially connected with in the control loop of power consumption equipment.
When clicking starting button QA, A.C. contactor J
CMust be electric, normal opened contact J
C-1, J
C-2, J
C-3, J
C-4Closure, sampled signal voltage make electromagnetic relay J after the bridge rectifier rectification
1Must be electric, so J
1-1Adhesive, the bidirectional triode thyristor conducting, phase current is through bidirectional triode thyristor, J
C-4And J
CForm the loop.Simultaneously, motor gets electric operation.When in the three phase mains (A, B, C) any one when opening circuit mutually, sampled signal voltage sharply changes, electromagnetic relay J
1Dead electricity, J
1-1Disconnect, bidirectional triode thyristor ends, A.C. contactor J
CDead electricity, J
C-1, J
C-2, J
C-3, J
C-4Promptly throw off, the motor dead electricity stops moving the commentaries on classics.
Claims (1)
1; a kind of three-phase automatic protector that opens circuit; comprise housing and be located at the interior operating circuit of housing with three power line passages; it is characterized in that; operating circuit has three current transformers that are connected in series mutually successively; output is connected with the bridge rectifier of filter capacitor C; electromagnetic relay and in order to be external in the bidirectional triode thyristor in the control loop; three current transformers are placed on the periphery of three power line passages of housing respectively; the two ends of the series circuit of three current transformers are connected with the input of bridge rectifier; electromagnetic relay is connected with the output of bridge rectifier, its normal opened contact J
1-1Be connected between the control utmost point and negative electrode of bidirectional triode thyristor after resistance R is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96248807 CN2280378Y (en) | 1996-11-27 | 1996-11-27 | Three-phase circuit break automatic protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96248807 CN2280378Y (en) | 1996-11-27 | 1996-11-27 | Three-phase circuit break automatic protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2280378Y true CN2280378Y (en) | 1998-04-29 |
Family
ID=33920576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96248807 Expired - Fee Related CN2280378Y (en) | 1996-11-27 | 1996-11-27 | Three-phase circuit break automatic protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2280378Y (en) |
-
1996
- 1996-11-27 CN CN 96248807 patent/CN2280378Y/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 |