CN2487142Y - Fault protective relay for neutral line - Google Patents
Fault protective relay for neutral line Download PDFInfo
- Publication number
- CN2487142Y CN2487142Y CN 01238111 CN01238111U CN2487142Y CN 2487142 Y CN2487142 Y CN 2487142Y CN 01238111 CN01238111 CN 01238111 CN 01238111 U CN01238111 U CN 01238111U CN 2487142 Y CN2487142 Y CN 2487142Y
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- CN
- China
- Prior art keywords
- circuit
- output
- neutral line
- pin
- integrated package
- 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 fault protective relay for neutral line, which is characterized in that: the electric signals from triple-phase lines A, B and C are connected and treated in order via a sampling circuit, a comparison circuit, a logic circuit, an amplifying circuit and an output circuit; wherein, the power circuits of the circuits are connected with any terminal of the triple-phase lines A, B and C to form loop circuits respectively, and output the control signal from the output terminals X and Y. The utility model has the advantages of stable performance, light structure, and strong versatility, which needs no debugging after being sealed, and is easy to change relevant air switches.
Description
The utility model relates to a kind of failure protecting device in the low voltage electric network, especially a kind of protection fault relay.
In the three-phase four-wire low-voltage electrical network, common short circuit, overload there have been very ripe protection, but neutral line fault has not been drawn attention, because (one), past user dispersion are single-phase house lead in mostly, broken neutral line does not cause overvoltage.In recent years, the one-storey house of dispersion was transformed into building, and electricity consumption is concentrated, and very major part is all used the three-phase four-wire system house lead in, and as broken neutral line and string phase fault take place, then destructiveness is very big.(2), power consumption is few the past; mainly be illumination and electric heating, the anti-overvoltage capabilities of these equipment is strong, along with the raising of living standards of the people; household electrical appliance are made accurate day by day; sensitivity strengthens, and therefore, the ability of the anti-overvoltage of this electric appliances also just weakens; so though neutral line rate of breakdown is not very high; but greatly destructive, and, the understanding of neutral line fault is progressively deepened along with people strengthen the protection consciousness of electrical appliance.
Neutral line fault is mainly in two kinds of situation:
The one, broken neutral line; The 2nd, neutral line misconnection becomes phase line; the two all can cause the two ends of electrical appliance to form overvoltage; its peak can reach 380 volts; be 1.7 times of mains voltage; for this overvoltage, the automatic protection of air switch can not moved, and overcurrent protection is then long because of the blown fuse time; cause the electrical appliance overvoltage and burn, even initiation fire.
Chinese patent is not found a kind of electronic equipment that the neutral line in the three-phase four-wire system input circuit is protected as yet by retrieval.
The purpose of this utility model provides the neutral line protection fault relay in a kind of power transmission line three-phase four-wire system.
The technical solution of the utility model is achieved in that provides a kind of neutral line protection fault relay, it comprises seat and lid two parts, seat is built-in with neutral line protection faulty line components and parts, it is characterized in that seat is built-in with four and inserts binding post U, V, W, N and two output wiring terminal X, Y; The signal of telecommunication of introducing from triple line A, B, C is through sample circuit, comparison circuit, logical circuit, amplifying circuit, output circuit connection processing in regular turn; The power circuit of foregoing circuit is connected to arbitrary end of triple line A, B, C, and connects and composes circuit loop with sample circuit, comparison circuit, logical circuit, amplifying circuit, output circuit respectively, and exports control signal from output X, the Y of output circuit; Wherein sample circuit constitutes three symmetrical circuit by the identical components and parts of parameter, output connects 6,8,10 pin that constitute comparison circuit and logical circuit integrated package respectively, relatively connect 7,9,11 pin of integrated package with reference voltage signal from the confession of power circuit input, 1,14, the 13 pin output of integrated package connects amplifying circuit.
Through the neutral line protection fault relay after above-mentioned the setting, stable performance, structure is light and handy, the integrated package LM339 of Cai Yonging especially, amount of ram is big, the precision height, not only simply but also reliable.Need not debugging after the encapsulation, the relay highly versatile is convenient to change the air switch that is associated.
Below in conjunction with description of drawings embodiment of the present utility model:
Fig. 1 is a circuit structure diagram of the present utility model.
Fig. 2 is a fundamental diagram of the present utility model.
Fig. 3 is a profile schematic diagram of the present utility model.
Winding diagram when Fig. 4 is the utility model work.
See also accompanying drawing 1 to accompanying drawing 3, a kind of neutral line protection fault relay is provided, it comprises seat 1 and lid 2 two parts, and seat 1 is built-in with neutral line protection faulty line components and parts, it is characterized in that seat 1 is built-in with four and inserts binding post U, V, W, N and two output wiring terminal X, Y; The signal of telecommunication of introducing from triple line A, B, C is through sample circuit, comparison circuit, logical circuit, amplifying circuit, output circuit connection processing in regular turn; The power circuit of foregoing circuit is connected to arbitrary end of triple line A, B, C, and connects and composes circuit loop with sample circuit, comparison circuit, logical circuit, amplifying circuit, output circuit respectively, and exports control signal from output X, the Y of output circuit; Wherein sample circuit constitutes three symmetrical circuit by the identical components and parts of parameter, output connects 6,8,10 pin that constitute comparison circuit and logical circuit integrated package respectively, relatively connect 7,9,11 pin of integrated package with reference voltage signal from the confession of power circuit input, 1,14, the 13 pin output of integrated package connects amplifying circuit.
See also accompanying drawing 1, aforesaid neutral line protection fault relay, arbitrary in its sample circuit by R
11And R
12Dividing potential drop is through D
3, R
13, C
3, R
14, R
15, R
16, W
1, C
6Behind the circuit rectifying and wave-filtering that connects to form, connect the pin in the pin 6,8,10 of integrated package, other two-phase connecting circuit is identical, and connection is also identical.
When guarantee using, guarantee the power circuit operate as normal, in power circuit and be connected to light-emitting diode, i.e. power supply indicator D
2, lid 2 is provided with seat 1 corresponding section power supply indicator D is installed
2Loophole 3.
Its course of work is: make the neutral fault protection relay by circuit requirement shown in Figure 1; carry out wiring by method shown in Figure 4; during normal the operation; all be lower than the reference voltage that provides by power circuit from the sampling voltage of the arbitrary pin input of integrated package pin 6,8,10 from 7,9,11 inputs of integrated package pin; at this moment; the integrated package pin one, 14,13 that constitutes comparison circuit and logical circuit is output as high level, the triode BG in the amplifying circuit
1Conducting, BG
2End, the X of output circuit, Y two ends output voltage are zero, and then the electricity consumption line work is normal; When the neutral line broke down, promptly in the three-phase circuit during arbitrary phase voltage overrate, the integrated package output switching activity was output as low level, triode BG
1End BG
2Conducting, relay DJ action, 220 volts alternating voltage is exported at the sub-X of relay output end, Y two ends, drives the shunt release action, thereby makes air switch automatic trip outage.
Technical parameter of the present utility model is:
1, overvoltage rated value: phase voltage 265 volts ± 2%
2, air switch is not more than 0.1 second operate time;
3, the relay power loss is not more than 0.8 watt;
4, relay fan-out capability: 380 volts of alternating voltages, 0.57 peace; 220 volts, 1 peace;
5, working power: 220 volts ± 20%
Overall dimension of the present utility model is: wide by 70, high by 120, thick by 40 (unit: millimeter)
Claims (4)
1, a kind of neutral line protection fault relay, it comprises seat (1) and lid (2) two parts, seat (1) is built-in with neutral line protection faulty line components and parts, it is characterized in that seat (1) is built-in with four and inserts binding post (U, V, W, N) and two output wiring terminals (X, Y); The signal of telecommunication of introducing from triple line (A, B, C) is through sample circuit, comparison circuit, logical circuit, amplifying circuit, output circuit connection processing in regular turn; The power circuit of foregoing circuit is connected to arbitrary end of triple line (A, B, C), and connect and compose circuit loop with sample circuit, comparison circuit, logical circuit, amplifying circuit, output circuit respectively, and export control signal from the output (X, Y) of output circuit; Wherein sample circuit constitutes three symmetrical circuit by the identical components and parts of parameter, output connects the pin (6,8,10) that constitutes comparison circuit and logical circuit integrated package respectively, relatively connect the pin (7,9,11) of integrated package with reference voltage signal from the confession of power circuit input, the pin of integrated package (1,14,13) output connects amplifying circuit.
2, neutral line protection fault relay according to claim 1 is characterized in that arbitrary by R in its sample circuit
11And R
12Dividing potential drop is through D
3, R
13, C
3, R
14, R
15, R
16, W
1, C
6Behind the circuit rectifying and wave-filtering that connects to form, connect the pin in the pin (6,8,10) of integrated package.
3, neutral line protection fault relay according to claim 1 is characterized in that described integrated package is LM339.
4, neutral line protection fault relay according to claim 1 is characterized in that in the power circuit and is connected to light-emitting diode, i.e. power supply indicator D
2, lid (2) is provided with seat (1) corresponding section power supply indicator D is installed
2Loophole (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01238111 CN2487142Y (en) | 2001-06-02 | 2001-06-02 | Fault protective relay for neutral line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01238111 CN2487142Y (en) | 2001-06-02 | 2001-06-02 | Fault protective relay for neutral line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2487142Y true CN2487142Y (en) | 2002-04-17 |
Family
ID=33650787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01238111 Expired - Fee Related CN2487142Y (en) | 2001-06-02 | 2001-06-02 | Fault protective relay for neutral line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2487142Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517829B (en) * | 2006-07-24 | 2012-11-14 | 新电缆有限公司 | Electrical safety devices and systems for use with electrical wiring, and methods for using same |
-
2001
- 2001-06-02 CN CN 01238111 patent/CN2487142Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517829B (en) * | 2006-07-24 | 2012-11-14 | 新电缆有限公司 | Electrical safety devices and systems for use with electrical wiring, and methods for using same |
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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 |