CN2679900Y - Phase loss leakage protector of 3-phase dynamo - Google Patents
Phase loss leakage protector of 3-phase dynamo Download PDFInfo
- Publication number
- CN2679900Y CN2679900Y CN 200320121282 CN200320121282U CN2679900Y CN 2679900 Y CN2679900 Y CN 2679900Y CN 200320121282 CN200320121282 CN 200320121282 CN 200320121282 U CN200320121282 U CN 200320121282U CN 2679900 Y CN2679900 Y CN 2679900Y
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- phase
- parallel
- relay
- protection circuit
- circuit
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Abstract
The utility model discloses a phase loss leakage protector of a 3-phase dynamo, comprising a phase loss protection circuit, an electric leakage protection circuit, a relay and a 3-phase switch. The phase loss protection circuit and the electric leakage protection circuit are respectively connected with the relay and the 3-phase switch. All the circuit elements are arranged in a case. When the electric leakage is occurred in the circuitry, the voltage generation in a mutual induction coil L2 can activate a controllable silicon to communicate. Thus, an inductance coil L1 is communicated for automatically switching the 3-phase switch, so the power source is disconnected. The electric voltage of a zero point in the circuit is approximate 3-5V when normal work. The electric voltage can not activate the relay. When the phase loss is occurred, the electric voltage of the zero point in the circuit is raised. Thus, the relay J acts and pulls in the contact point J1-1 to close. The phase loss protection circuit is connected with the 3-phase switch through the inductance coil L1 for automatically switching the 3-phase switch. Thus, the electrical source is disconnected. The utility model has the advantages of reasonable designing, simple structure, low cost of manufacture, reliable and safe application, and one body integrated with the phase loss protection and the electric leakage protection.
Description
(1) technical field
The utility model relates to a kind of circuit protection device of three phase electric machine, particularly a kind of three phase electric machine phase shortage earth leakage protective device.
(2) background technology
In the course of work of three phase electric machine, the phenomenon of circuit phase shortage or electric leakage takes place for various reasons sometimes, cause the motor cisco unity malfunction easily, influence is produced, and also can cause personal injury sometimes.Products such as open-phase protector for three-phase motor and three phase electric machine earth leakage protective device are arranged in the market, but all be single product, cause installation loaded down with trivial details during use, the equipment complexity, and also expense is higher.
(3) summary of the invention
For remedying the deficiencies in the prior art, the utility model provides a kind of reasonable in design, simple in structure, cheap, reliable and secure three phase electric machine phase shortage earth leakage protective device that integrates open-phase protection and earth leakage protective of use.
Three phase electric machine phase shortage earth leakage protective device is made up of open-phase protection circuit, leakage protection circuit, relay and threephase switch, and open-phase protection circuit is connected with relay and threephase switch respectively with leakage protection circuit, and all circuit elements all are installed in the housing.
Open-phase protection circuit is made up of resistance R 4-R6, capacitor C 1-C5, diode D1-D4 and relay, C1 is in parallel with R4, C2 is in parallel with R5 and C3 is in parallel again with three parallel circuitss that R6 composes in parallel, one end of three parallel circuitss is connected with threephase switch, and three parallel circuits backs in parallel again are connected with the rectification circuit that D1-D4 forms; The parallel circuits that rectification circuit that D1-D4 forms and capacitor C 1, C5 and relay are formed is connected in series.
Leakage protection circuit is made up of mutual inductor L2, inductance coil L1, resistance R 1, R2, capacitor C 6, C7, diode D5-D8, controllable silicon BT and relay; the L2 back of connecting with R1 is in parallel with R2, D8, C6, C7; the zero line of another termination power of this parallel circuits; this parallel circuits is connected with controllable silicon BT; controllable silicon BT is connected in parallel with relay and then is connected with the negative pole of D5-D7 by inductance coil L1, and the positive pole of D5-D7 is connected with threephase switch.
Be connected a hookup between the zero line of threephase switch and power supply, this hookup is composed in series by resistance R 3 and key switch SK.
During use, the utility model is connected with motor with three phase mains respectively, when line electrical leakage, has voltage to produce among the mutual inductor L2, triggers the controllable silicon conducting, and then inductance coil L1 conducting, makes the threephase switch automatic trip, and power supply disconnects.0 voltage is about 3-5V in the circuit when the motor operate as normal, and this voltage can not make the actuating of relay; When phase shortage took place, 0 voltage raise in the circuit, drove the relay J action, and its contact of adhesive J1-1 makes open-phase protection circuit pass through inductance coil L1 and threephase switch is connected, the threephase switch automatic trip, and power supply disconnects.
The effect of hookup is normally whether check of the present utility model, the switch S that pushes button K, if the threephase switch automatic trip, power supply disconnects, and illustrates of the present utility model working properly; Otherwise illustrate that work of the present utility model is undesired, need maintenance.
The utlity model has characteristics reasonable in design, simple in structure, cheap, as to use reliable and secure, collection open-phase protection and earth leakage protective and one.
(4) description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model.
Wherein, A, B, C connect power firestreak, and it is ground connection that N connects zero-power line, and 0 represents an artificial zero point of setting, and it is motor that three arrows represent to connect load.
(5) embodiment
Embodiment: electrical schematic diagram of the present utility model as shown in Figure 1.Be made up of open-phase protection circuit, leakage protection circuit, relay and threephase switch, open-phase protection circuit is connected with relay, threephase switch and load contacts respectively with leakage protection circuit, and all circuit elements all are installed in the housing.
Open-phase protection circuit is made up of resistance R 4-R6, capacitor C 1-C5, diode D1-D4 and relay, C1 is in parallel with R4, C2 is in parallel with R5 and C3 is in parallel again with three parallel circuitss that R6 composes in parallel, one end of three parallel circuitss is connected with threephase switch, and three parallel circuits backs in parallel again are connected with the rectification circuit that D1-D4 forms; The parallel circuits that rectification circuit that D1-D4 forms and capacitor C 1, C5 and relay are formed is connected in series.
Leakage protection circuit is made up of mutual inductor L2, inductance coil L1, resistance R 1, R2, capacitor C 6, C7, diode D5-D8, controllable silicon BT and relay; the L2 back of connecting with R1 is in parallel with R2, D8, C6, C7; the zero line of another termination power of this parallel circuits; this parallel circuits is connected with controllable silicon BT; controllable silicon BT is connected in parallel with relay and then is connected with the negative pole of D5-D7 by inductance coil L1, and the positive pole of D5-D7 is connected with threephase switch.
Be connected a hookup between the zero line of threephase switch and power supply, this hookup is composed in series by resistance R 3 and key switch SK.
Claims (4)
1, a kind of three phase electric machine phase shortage earth leakage protective device; it is characterized in that; be made up of open-phase protection circuit, leakage protection circuit, relay and threephase switch, open-phase protection circuit is connected with relay and threephase switch respectively with leakage protection circuit, and all circuit elements all are installed in the housing.
2, three phase electric machine phase shortage earth leakage protective device as claimed in claim 1, it is characterized in that, open-phase protection circuit is made up of resistance R 4-R6, capacitor C 1-C5, diode D1-D4 and relay, C1 is in parallel with R4, C2 is in parallel with R5 and C3 is in parallel again with three parallel circuitss that R6 composes in parallel, one end of three parallel circuitss is connected with threephase switch, and three parallel circuits backs in parallel again are connected with the rectification circuit that D1-D4 forms; The parallel circuits that rectification circuit that D1-D4 forms and capacitor C 1, C5 and relay are formed is connected in series.
3, three phase electric machine phase shortage earth leakage protective device as claimed in claim 1; it is characterized in that; leakage protection circuit is made up of mutual inductor L2, inductance coil L1, resistance R 1, R2, capacitor C 6, C7, diode D5-D8, controllable silicon BT and relay; the L2 back of connecting with R1 is in parallel with R2, D8, C6, C7; the zero line of another termination power of this parallel circuits; this parallel circuits is connected with controllable silicon BT; controllable silicon BT is connected in parallel with relay and then is connected with the negative pole of D5-D7 by inductance coil L1, and the positive pole of D5-D7 is connected with threephase switch.
4, three phase electric machine phase shortage earth leakage protective device as claimed in claim 1 is characterized in that, is connected a hookup between the zero line of threephase switch and power supply, and this hookup is composed in series by resistance R 3 and key switch SK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320121282 CN2679900Y (en) | 2003-12-31 | 2003-12-31 | Phase loss leakage protector of 3-phase dynamo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320121282 CN2679900Y (en) | 2003-12-31 | 2003-12-31 | Phase loss leakage protector of 3-phase dynamo |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2679900Y true CN2679900Y (en) | 2005-02-16 |
Family
ID=34581122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320121282 Expired - Fee Related CN2679900Y (en) | 2003-12-31 | 2003-12-31 | Phase loss leakage protector of 3-phase dynamo |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2679900Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732862A (en) * | 2017-10-20 | 2018-02-23 | 杨蔚星 | A kind of automatically controlled protection switch of three-phase and four-line all direction multifunctional accident |
-
2003
- 2003-12-31 CN CN 200320121282 patent/CN2679900Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732862A (en) * | 2017-10-20 | 2018-02-23 | 杨蔚星 | A kind of automatically controlled protection switch of three-phase and four-line all direction multifunctional accident |
| CN107732862B (en) * | 2017-10-20 | 2024-04-19 | 杨蔚星 | Three-phase four-wire omnibearing multifunctional accident electric control protection switch |
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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 |