CN204179638U - A kind of residual current circuit breaker - Google Patents
A kind of residual current circuit breaker Download PDFInfo
- Publication number
- CN204179638U CN204179638U CN201420458920.3U CN201420458920U CN204179638U CN 204179638 U CN204179638 U CN 204179638U CN 201420458920 U CN201420458920 U CN 201420458920U CN 204179638 U CN204179638 U CN 204179638U
- Authority
- CN
- China
- Prior art keywords
- rectifier bridge
- circuit breaker
- current
- controllable silicon
- trigger
- 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 - Lifetime
Links
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 18
- 239000010703 silicon Substances 0.000 claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 7
- 238000004080 punching Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000006698 induction Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model relates to a kind of residual current circuit breaker, comprise circuit breaker Q F and leakage tripping device, leakage tripping device is by the load-side power taking of circuit breaker Q F, through tripping coil L, be connected to the input of rectifier bridge, two outputs of rectifier bridge connect anode and the negative electrode of controllable silicon SCR respectively, two outputs of rectifier bridge are also connected with RC series circuit, the output of zero-sequence transformer TA is through rectifier bridge, the anode of controllable silicon SCR, the trigger electrode of controllable silicon SCR and the first current-limiting resistance R2 are concatenated into earth leakage protective and trigger loop, an input power taking of self-rectifying bridge, through the second current-limiting resistance R3, diode D5 is connected to the output negative pole end of rectifier bridge, diode D5 is serially connected with earth leakage protective and triggers loop.Voltage of adjusting after zero-sequence transformer induction superposes with the tube voltage drop of diode, and enhance silicon controlled trigger energy, zero-sequence transformer is without the need to secondary punching; reliably can trigger leakage protection circuit, circuit structure is simple, and cost is low; leakage current characteristic consistency is good, is suitable for expanding production.
Description
Technical field
The utility model relates to a kind of residual current circuit breaker.
Background technology
As shown in Figure 1, the structure of existing a kind of residual current circuit breaker, comprises circuit breaker Q F and leakage tripping device; by supply line L; N penetrates zero-sequence transformer TA, and when leak current fault appears in supply line, the output of zero-sequence transformer TA induces residual current signal; direct voltage is converted thereof into by earth leakage protective circuits for triggering; trigger the gate pole of controllable silicon SCR with this, after controllable silicon SCR conducting, tripping coil L can be made to obtain electric; the circuit breaker Q F disjunction controlled by tripping coil L, open failure supply line.In the prior art, in order to make controllable silicon obtain enough trigger energies, zero-sequence transformer needs secondary punching, the consumption of the main traverse line not only increased, and the assembling speed of workman also reduces.
Summary of the invention
The purpose of this utility model is the defect overcoming prior art, provides a kind of and adopts existing zero-sequence transformer, only need a punching can meet the residual current circuit breaker of silicon controlled trigger energy demand.
For achieving the above object, the utility model adopts so a kind of residual current circuit breaker, comprise circuit breaker Q F and leakage tripping device, described leakage tripping device is by the load-side power taking of described circuit breaker Q F, through tripping coil L, be connected to the input of rectifier bridge, two outputs of described rectifier bridge connect anode and the negative electrode of controllable silicon SCR respectively, two outputs of described rectifier bridge are also connected with RC series circuit, the output of zero-sequence transformer TA is through described rectifier bridge, the anode of described controllable silicon SCR, the trigger electrode of described controllable silicon SCR and the first current-limiting resistance R2 are concatenated into earth leakage protective and trigger loop, from an input power taking of described rectifier bridge, through the second current-limiting resistance R3, diode D5 is connected to the output negative pole end of described rectifier bridge, described diode D5 is serially connected with described earth leakage protective and triggers loop.Compared with the prior art; the beneficial effects of the utility model are embodied in: by the design of above circuit structure; voltage of adjusting after zero-sequence transformer induction superposes with the tube voltage drop of diode; enhance silicon controlled trigger energy, zero-sequence transformer, without the need to secondary punching, reliably can trigger leakage protection circuit; circuit structure is simple; cost is low, and leakage current characteristic consistency is good, is suitable for expanding production.
Especially, testing button TK forms test access through the load end of the 3rd current-limiting resistance R5, described rectifier bridge, described RC series circuit, described tripping coil L and described circuit breaker Q F.By the setting of testing button, be convenient to production maintenance personnel debug products, verify the whether normal of earth leakage protective actuating mechanism.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model embodiment residual current circuit breaker.
Embodiment
As shown in Figure 1, a kind of residual current circuit breaker, comprise circuit breaker Q F and leakage tripping device, leakage tripping device is by the load-side power taking of circuit breaker Q F, through tripping coil L, be connected to the input of rectifier bridge, two outputs of rectifier bridge connect anode and the negative electrode of controllable silicon SCR respectively, two outputs of rectifier bridge are also connected with RC series circuit, the output of zero-sequence transformer TA is through rectifier bridge, the anode of controllable silicon SCR, the trigger electrode of controllable silicon SCR and the first current-limiting resistance R2 are concatenated into earth leakage protective and trigger loop, an input power taking of self-rectifying bridge, through the second current-limiting resistance R3, diode D5 is connected to the output negative pole end of rectifier bridge, diode D5 is serially connected with earth leakage protective and triggers loop.
Testing button TK forms test access through the load end of the 3rd current-limiting resistance R5, rectifier bridge, RC series circuit, tripping coil L and circuit breaker Q F.
Claims (2)
1. a residual current circuit breaker, comprise circuit breaker (QF) and leakage tripping device, described leakage tripping device is by the load-side power taking of described circuit breaker (QF), through tripping coil (L), be connected to the input of rectifier bridge, two outputs of described rectifier bridge connect anode and the negative electrode of controllable silicon (SCR) respectively, two outputs of described rectifier bridge are also connected with RC series circuit, the output of zero-sequence transformer (TA) is through described rectifier bridge, the anode of described controllable silicon (SCR), the trigger electrode of described controllable silicon (SCR) and the first current-limiting resistance (R2) are concatenated into earth leakage protective and trigger loop, it is characterized in that: from an input power taking of described rectifier bridge, through the second current-limiting resistance (R3), diode (D5) is connected to the output negative pole end of described rectifier bridge, described diode (D5) is serially connected with described earth leakage protective and triggers loop.
2. residual current circuit breaker according to claim 1, is characterized in that: testing button (TK) forms test access through the 3rd current-limiting resistance (R5), described rectifier bridge, described RC series circuit, described tripping coil (L) with the load end of described circuit breaker (QF).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420458920.3U CN204179638U (en) | 2014-08-10 | 2014-08-10 | A kind of residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420458920.3U CN204179638U (en) | 2014-08-10 | 2014-08-10 | A kind of residual current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204179638U true CN204179638U (en) | 2015-02-25 |
Family
ID=52568413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420458920.3U Expired - Lifetime CN204179638U (en) | 2014-08-10 | 2014-08-10 | A kind of residual current circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204179638U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370125A (en) * | 2017-08-14 | 2017-11-21 | 广东美的制冷设备有限公司 | Breaker and its dropout drive circuit |
| CN107482577A (en) * | 2017-09-16 | 2017-12-15 | 弘乐电气有限公司 | Overvoltage release |
| CN110086146A (en) * | 2019-06-03 | 2019-08-02 | 黄华道 | Applied to the overload protecting circuit in earth leakage protective socket |
-
2014
- 2014-08-10 CN CN201420458920.3U patent/CN204179638U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370125A (en) * | 2017-08-14 | 2017-11-21 | 广东美的制冷设备有限公司 | Breaker and its dropout drive circuit |
| CN107482577A (en) * | 2017-09-16 | 2017-12-15 | 弘乐电气有限公司 | Overvoltage release |
| CN110086146A (en) * | 2019-06-03 | 2019-08-02 | 黄华道 | Applied to the overload protecting circuit in earth leakage protective socket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150225 |
|
| CX01 | Expiry of patent term |