CN202333748U - Three-phase four-wire null line breakdown protection device - Google Patents
Three-phase four-wire null line breakdown protection device Download PDFInfo
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- CN202333748U CN202333748U CN2011204825753U CN201120482575U CN202333748U CN 202333748 U CN202333748 U CN 202333748U CN 2011204825753 U CN2011204825753 U CN 2011204825753U CN 201120482575 U CN201120482575 U CN 201120482575U CN 202333748 U CN202333748 U CN 202333748U
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- circuit breaker
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- relay
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Abstract
The utility model discloses a three-phase four-wire null line breakdown protection device, and belongs to the technical field of automatic protection devices of power distribution systems. The three-phase four-wire null line breakdown protection device comprises a breaker, a relay and a terminal strip. When a null line (N) in a circuit is burnt out, a potential difference is formed between the two ends of a coil L2 in the relay; the coil L2 is electrified, and a normally open switch S1 is closed; then, a tripping coil L1 in the breaker is electrified, and the breaker is tripped. Therefore, a high voltage is prevented after the null line is burnt out, and household appliances are protected, and then the circuit operation is safe and reliable. By utilizing the breaker, the relay and the terminal strip, the device has the advantages of simple structure and low production cost.
Description
Technical field
The utility model belongs to electrical power distribution system automatic safety device technical field, relates in particular to a kind of protector for null line breaking.
Background technology
Most countries all is to adopt low pressure three-phase and four-line electric power system, and the zero line in the power-supply system (N) is claimed " disconnected zero " accident if rupture." disconnected zero " accident takes place, and can cause that the too high or too low and zero line voltage to earth of single-phase voltage crosses high phenomenon, thereby but cause circuit and equipment to suffer damage and fire hazard and Danger Electric shock risk; Prevention to disconnected zero accident all takes much count of both at home and abroad, has adopted various ways, but existing equipment exists the structure more complicated, the shortcoming that manufacturing cost is higher.
The utility model content
The utility model technical problem to be solved provides a kind of three-phase and four-line protector for null line breaking, have simple in structure, the characteristics of low cost of manufacture.
For solving the problems of the technologies described above; The technical scheme that the utility model is taked is: a kind of three-phase and four-line protector for null line breaking; It is characterized in that comprising circuit breaker and relay; The input of said circuit breaker connects A, B, the C phase of three phase mains respectively; The end of normal open switch S1 in the said relay of a termination of lifts coil L1 on the said circuit breaker, the C phase output terminals of the said circuit breaker of another termination of lifts coil L1 on the said circuit breaker, the A phase output terminals of the said circuit breaker of another termination of said normal open switch S1; Can control the end ground connection of the coil L2 of said normal open switch S1 action in the said relay, the other end of said coil L2 is connected with zero line (N).
Said device also comprises terminal board, and said terminal board is positioned on A phase line, ground wire, zero line (N) and the C phase line that is arranged side by side.
The model of said circuit breaker is: NM1-400S/3340.
The model of said relay is: Z-M4X10.
Adopt the beneficial effect that technique scheme produced to be: at first, after zero line (N) blew, the two ends of the coil L2 in the relay formed potential difference; Coil L2 gets electric, and normal open switch S1 is closed, and at this moment the lifts coil L1 in the circuit breaker gets; Circuit breaker breaks off; Avoided zero line to blow the high voltage that the back produces, played the effect of protection household electrical appliance, circuit is run more secure, reliable.Secondly, said device has only used relay, circuit breaker and terminal board, have simple in structure, the characteristics of low cost of manufacture.At last, be provided with terminal board in the said device, make that maintenance is more convenient, wiring is more attractive in appearance.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the utility model schematic diagram;
Wherein: 1, circuit breaker 2, relay 3, terminal board.
Embodiment
As shown in Figure 1, a kind of three-phase and four-line protector for null line breaking comprises circuit breaker 1, relay 2 and terminal board 3, and said circuit breaker 1 can use NM1-400S/3340, and said relay 2 can use Z-M4X10.The input of said circuit breaker 1 connects A, B, the C phase of three phase mains respectively; The end of normal open switch S1 in the said relay 2 of the termination of lifts coil L1 on the said circuit breaker 1; The C phase output terminals of the said circuit breaker 1 of another termination of lifts coil L1 on the said circuit breaker 1; When said lifts coil L2 gets when electric, said circuit breaker 1 will break off.The A phase output terminals of the said circuit breaker 1 of another termination of said normal open switch S1 can be controlled the end ground connection of the coil L2 of said normal open switch S1 action in the said relay 2, the other end of said coil L2 is connected with zero line (N).Can on the A phase line that is arranged side by side, ground wire, zero line (N) and C phase line, terminal board 3 be set for wiring is attractive in appearance, easy to maintenance.Connect load on the output of said circuit breaker 1 and the zero line.
After zero line (N) blew, the two ends of the coil L2 in the relay 2 formed potential difference, and coil L2 gets; Normal open switch S1 is closed, and at this moment the lifts coil L1 in the circuit breaker 1 gets electricly, and circuit breaker 1 breaks off; Cut off the electricity supply; Avoided zero line to blow the high voltage that the back produces, played the effect of protection household electrical appliance, circuit is run more secure, reliable; And said device has only used a relay 2, a circuit breaker 1 and a terminal board 3, have simple in structure, the characteristics of low cost of manufacture.
Claims (4)
1. three-phase and four-line protector for null line breaking; It is characterized in that comprising circuit breaker (1) and relay (2); The input of said circuit breaker (1) connects A, B, the C phase of three phase mains respectively; Said circuit breaker (1) is gone up the end of the middle normal open switch S1 of the said relay of a termination (2) of lifts coil L1; Said circuit breaker (1) is gone up the C phase output terminals of the said circuit breaker of another termination (1) of lifts coil L1; The A phase output terminals of the said circuit breaker of another termination (1) of said normal open switch S1 can be controlled the end ground connection of the coil L2 of said normal open switch S1 action in the said relay (2), the other end of said coil L2 is connected with zero line (N).
2. a kind of three-phase and four-line protector for null line breaking according to claim 1 is characterized in that said device also comprises terminal board (3), and said terminal board (3) is positioned on A phase line, ground wire, zero line (N) and the C phase line that is arranged side by side.
3. a kind of three-phase and four-line protector for null line breaking according to claim 1 is characterized in that the model of said circuit breaker (1) is: NM1-400S/3340.
4. a kind of three-phase and four-line protector for null line breaking according to claim 1 is characterized in that the model of said relay (2) is: Z-M4X10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204825753U CN202333748U (en) | 2011-11-29 | 2011-11-29 | Three-phase four-wire null line breakdown protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204825753U CN202333748U (en) | 2011-11-29 | 2011-11-29 | Three-phase four-wire null line breakdown protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202333748U true CN202333748U (en) | 2012-07-11 |
Family
ID=46445714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204825753U Expired - Fee Related CN202333748U (en) | 2011-11-29 | 2011-11-29 | Three-phase four-wire null line breakdown protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202333748U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856901A (en) * | 2012-08-30 | 2013-01-02 | 海尔集团公司 | Power supply line of household appliance loads |
| CN103986119A (en) * | 2014-05-30 | 2014-08-13 | 国家电网公司 | Null line lack and breakage automatic protection device |
-
2011
- 2011-11-29 CN CN2011204825753U patent/CN202333748U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856901A (en) * | 2012-08-30 | 2013-01-02 | 海尔集团公司 | Power supply line of household appliance loads |
| CN103986119A (en) * | 2014-05-30 | 2014-08-13 | 国家电网公司 | Null line lack and breakage automatic protection device |
| CN103986119B (en) * | 2014-05-30 | 2017-06-20 | 国家电网公司 | Lack zero, automatic safety device off zero |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20141129 |
|
| EXPY | Termination of patent right or utility model |