CN2347268Y - Leakage protecting switch - Google Patents
Leakage protecting switch Download PDFInfo
- Publication number
- CN2347268Y CN2347268Y CN 98233586 CN98233586U CN2347268Y CN 2347268 Y CN2347268 Y CN 2347268Y CN 98233586 CN98233586 CN 98233586 CN 98233586 U CN98233586 U CN 98233586U CN 2347268 Y CN2347268 Y CN 2347268Y
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- CN
- China
- Prior art keywords
- circuit
- lightning strike
- switch
- breaker
- earth leakage
- 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 discloses an electric-leakage preventing switch with the prevention function of lightning strike. The utility model is characterized in that a voltage dependent resistor and an electromagnetic attracting coil of the electric-leakage preventing switch are connected in series to form a lightning strike preventing circuit, and both ends of the lightning strike preventing circuit are respectively connected with two power supply lines. When the instant high voltage of a low-voltage electricity utilization lines is caused because of the lightning strike, the voltage dependent resistor is conducted, and the current passes through the power supply line with high voltage, the voltage dependent resistor, the electromagnetic attracting coil to a low-voltage line (zero line). Thereby, the action of electromagnetic attracting coil is directly attracted to switch off a trip-typed switch, and the purpose of lightning strike prevention is realized.
Description
The utility model relates to a kind of emergency protective circuit device, particularly a kind of earth leakage circuit-breaker.
Common earth leakage circuit-breaker; in circuit, leak electricity, during abnormal conditions such as short circuit; defencive function with automatic shutdown circuit; but there is not the lightning strike protection function; when low pressure with electric line because of being struck by lightning former thereby when instantaneous pressure occurring; can not cut off circuit at once, the protection power consumption equipment exempts from destruction.Though some earth leakage circuit-breakers that have overvoltage crowbar also can play certain lightning strike protection effect; but its protection action is the piezo-resistance startup conducting by overvoltage crowbar; cause line short; produce induced current by the electric leakage sensor circuit indirectly and make the action of electromagnetism pull-in winding, circuit disconnect switch.Its operate time is longer, also the leaked electricity influence of sensor circuit of quality of movement, and the starting resistor value of the piezo-resistance selected for use of overvoltage crowbar is lower simultaneously, and the high pressure that produces because of the thunderbolt reason makes it be damaged easily.
The purpose of this utility model aims to provide a kind of earth leakage circuit-breaker, when low pressure occurs in electric line cutting off circuit immediately because of being struck by lightning former thereby during the instantaneous pressure that causes, can making the direct action of electromagnetism pull-in winding, reaches the purpose of protection power consumption equipment.
The purpose of this utility model is achieved through the following technical solutions:
The utility model earth leakage circuit-breaker answers circuit to form by housing, electromagnetic trip formula Isolating Switch, electromagnetism pull-in winding and hookup, leakage inductance; it is characterized in that: it also has a lightning protection circuit that is in series by the electromagnetism pull-in winding of piezo-resistance and earth leakage circuit-breaker, and the two ends of lightning protection circuit are connected with two power lines respectively.When low pressure occurs instantaneous pressure with electric line because of the thunderbolt reason; piezo-resistance starts conducting; electric current flows to the low-tension supply line from the power line of band high pressure by piezo-resistance and pull-in winding; electric current by pull-in winding makes the iron core magnetization of pull-in winding produce suction; make the action of electromagnetic trip formula Isolating Switch; cut off circuit, the protection power consumption equipment exempts from damage.
The utility model earth leakage circuit-breaker can also increase an excess voltage protection again on the basis of technique scheme, be connected across between two power lines, makes earth leakage circuit-breaker have over-voltage protection function.
The utility model leakage switch is owing to increased a piezo-resistance on the basis of existing earth leakage circuit-breaker; electromagnetism pull-in winding series connection by piezo-resistance and earth leakage circuit-breaker; constitute the lightning protection circuit of a cross-over connection between two power lines, thereby make earth leakage circuit-breaker have the lightning strike protection function.
Below in conjunction with drawings and Examples the utility model is described in further detail:
Fig. 1: the utility model embodiment 1 electric functional-block diagram.
Fig. 2: the utility model embodiment 1 circuit diagram.
Fig. 3: the utility model embodiment 2 electric functional-block diagrams.
Fig. 4: the utility model embodiment 2 circuit diagrams.
Number in the figure: 1, electromagnetic trip formula Isolating Switch; 2, electromagnetism pull-in winding; 3, lightning strike protection piezo-resistance.
Embodiment 1: the electric functional-block diagram of present embodiment as shown in Figure 1, circuit diagram is as shown in Figure 2.Earth leakage circuit-breaker is made up of housing, electromagnetic trip formula Isolating Switch 1, electromagnetism pull-in winding 2, hookup, electric leakage sensor circuit and lightning protection circuit.Hookup, the electric leakage sensor circuit as shown in Figure 2, its structure is identical with existing leakage switch with operating principle.Lightning protection circuit is in series by lightning strike protection piezo-resistance 3 and electromagnetism pull-in winding 2, and the two ends of lightning protection circuit are connected with two power lines (live wire, zero line) respectively.As shown in Figure 2.When low pressure occurs instantaneous pressure with electric line because of the thunderbolt reason; lightning strike protection piezo-resistance 3 (MY1) starts conducting; electric current flows to the low-tension supply line from the power line of band instantaneous high pressure by piezo-resistance 3 and electromagnetism pull-in winding 2; the electric current of electromagnetism pull-in winding 2 of flowing through makes the iron core magnetization produce suction; the buckle of adhesive electromagnetic trip formula Isolating Switch makes the Isolating Switch action, cuts off circuit; the protection power consumption equipment exempts from damage, thereby makes earth leakage circuit-breaker possess the lightning strike protection function.Structure, the operating principle of electromagnetic trip formula Isolating Switch are identical with existing earth leakage circuit-breaker.
Embodiment 2: the electric functional-block diagram of present embodiment earth leakage circuit-breaker as shown in Figure 3, circuit diagram as shown in Figure 4, it is on the basis of embodiment 1 described earth leakage circuit-breaker, increases an overvoltage crowbar, as shown in Figure 4.Excess voltage protection by one directly be connected across two between power line piezo-resistance MY2 and form by the overvoltage warning circuit that LED, diode D8 and resistance R 2 are in series.When abnormal higher overvoltage occurring with electric line, piezo-resistance MY2 starts conducting and forms short circuit, and the electric leakage sensor circuit produces induced current, and the electromagnetism pull-in winding of flowing through, make iron core magnetization produce suction, the buckle of adhesive electromagnetic trip formula switch and make the Isolating Switch action cuts off circuit.Reach the overvoltage protection purpose, make earth leakage circuit-breaker possess over-voltage protection function.Because excess voltage protection has the lightning strike protection function concurrently, also makes the present embodiment earth leakage circuit-breaker have dual lightning strike protection function.
Claims (2)
1, a kind of earth leakage circuit-breaker with lightning strike protection function; comprise housing, electromagnetic trip formula Isolating Switch (1), electromagnetism pull-in winding (2) and hookup, electric leakage sensor circuit; it is characterized in that: it also has a lightning protection circuit that is in series by piezo-resistance (3) and electromagnetism pull-in winding (2), and the two ends of lightning protection circuit are connected with two power lines (live wire, zero line) respectively.
2, the earth leakage circuit-breaker with lightning strike protection function according to claim 1 is characterized in that: it comprises that also is connected across two overvoltage crowbars between the power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98233586 CN2347268Y (en) | 1998-01-17 | 1998-01-17 | Leakage protecting switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98233586 CN2347268Y (en) | 1998-01-17 | 1998-01-17 | Leakage protecting switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2347268Y true CN2347268Y (en) | 1999-11-03 |
Family
ID=33982284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98233586 Expired - Fee Related CN2347268Y (en) | 1998-01-17 | 1998-01-17 | Leakage protecting switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2347268Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373727C (en) * | 2004-08-20 | 2008-03-05 | 四川康姆逊电磁防护有限责任公司 | Improved overheat overvoltage protection machine |
| CN100506390C (en) * | 2002-10-29 | 2009-07-01 | 苏国权 | Grinding and cutting device |
| CN105024340A (en) * | 2015-08-11 | 2015-11-04 | 国网浙江桐乡市供电公司 | Simple overvoltage protection trigger device |
-
1998
- 1998-01-17 CN CN 98233586 patent/CN2347268Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100506390C (en) * | 2002-10-29 | 2009-07-01 | 苏国权 | Grinding and cutting device |
| CN100373727C (en) * | 2004-08-20 | 2008-03-05 | 四川康姆逊电磁防护有限责任公司 | Improved overheat overvoltage protection machine |
| CN105024340A (en) * | 2015-08-11 | 2015-11-04 | 国网浙江桐乡市供电公司 | Simple overvoltage protection trigger device |
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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 |