CN102545142B - Adopt zero Firewire circuitry guard method of relay, circuit and device - Google Patents
Adopt zero Firewire circuitry guard method of relay, circuit and device Download PDFInfo
- Publication number
- CN102545142B CN102545142B CN201210007216.1A CN201210007216A CN102545142B CN 102545142 B CN102545142 B CN 102545142B CN 201210007216 A CN201210007216 A CN 201210007216A CN 102545142 B CN102545142 B CN 102545142B
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- relay
- switch
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- live wire
- zero line
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a kind of zero live wire guard method adopting relay; the method is connected the relay as master switch with zero line; the live wire end of load by respective load switch and live wire serial connection, loaded zero line side all pass through to connect with zero line as the relay of master switch.Adopt the relay protection circuit of said method and device, except retaining original defencive function, when installation or the production test of controller manufacturer to complete system plant, better protection can be provided.As long as the switch of load is not opened, even if operating personnel have encountered load because of carelessness when operation, also security incident can not be there is.And this improvement can not increase any cost.
Description
Technical field
The present invention relates to a kind of circuit protection method, circuit and device, particularly relate to a kind of circuit protection method, circuit and the device that adopt relay.
Background technology
When making home wiring control plate, time particularly washing machine, refrigerator, roaster etc. are to electromagnetic interference and environment for use and safety requirements higher large home wiring control plate, for the consideration of secure context, a relay generally can be used as master switch, the live wire serial connection of relay and all loads is got up, and links together with the live wire end of load.In time driving the relay failure of load, by disconnecting the relay as master switch, load and live wire can be disconnected, play the effect of protective circuit safety.
But the method for this zero Firewire circuitry protection, have the place that not enough: all loads still can finally can all be connected on zero line, now, zero line is just equivalent to a common port.Although zero line does not have electricity in theory, be safe, in actual applications, particularly when some exception, such as fiery zero line connects instead because of carelessness, and in this case, load just has one end to be directly connected on live wire.Now, under standby state, some extraneous interference may will have influence on load, and when complete system plant's installation debugging, also may there is potential safety hazard to operating personnel.
Summary of the invention
In order to solve problem in prior art, the invention provides a kind of adopt relay zero Firewire circuitry guard method, circuit and device, can problems of the prior art be overcome, any cost can not be increased again simultaneously.
The present invention is achieved through the following technical solutions:
Adopt a zero Firewire circuitry guard method of relay, it is characterized in that, the relay as master switch is connected with zero line; The live wire end of load is by respective load switch and live wire serial connection, and the zero line side of load is connected with zero line by the relay as master switch.
Adopt a zero live wire protective circuit of relay, described circuit comprises a relay switch as master switch, load, load switch, it is characterized in that: the relay switch as master switch is connected with zero line; The live wire end of load by respective load switch and live wire serial connection, loaded zero line side all pass through to connect with zero line as the relay switch of master switch.
A kind of device, described device comprises electronic circuit, it is characterized in that, described electronic circuit comprises the zero live wire protective circuit adopting relay.
Further, the described relay switch as master switch comprises relay and control circuit.
Further, described load switch is relay switch or common mechanical switch.
The invention has the beneficial effects as follows: except retaining original defencive function; better protection can be provided when installation or the production test of controller manufacturer to complete system plant; as long as the switch of load is not opened; even if operating personnel have encountered load because of carelessness when operation, also security incident can not be there is.And this improvement can not increase any cost, be worth upgrading upgrading on original product.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of conventional relay protection circuit;
Fig. 2 is the schematic diagram of relay protection circuit of the present invention.
In figure, each component names is as follows:
L: live wire;
N: zero line;
RY101, RY102, RY103: load switch;
RY104: as the relay of master switch.
Embodiment
Illustrate below in conjunction with accompanying drawing and embodiment the present invention is further described.
As shown in Figure 1; conventional relay protection circuit adopts relay R Y104 to carry out circuit protection as master switch; RY104 and live wire serial connection are got up; the live wire end of load is connected with the relay one end as master switch by respective load switch; loaded zero line side is directly connected with zero line, thus plays the effect of protection.
But this kind of connected mode has a not enough place to be: all loads or can finally can all be connected on zero line, this time, zero line is just equivalent to a common port, although zero line is not electric in theory, is safe, in practical application, particularly when some exception, as fiery zero line connects instead because of carelessness, in this case, load just has one end to be directly connected on live wire.Like this under standby state, some extraneous interference may will have influence on load.And when complete system plant's installation debugging, also may potential safety hazard be there is to operating personnel.
Therefore, for the hidden danger of this circuit, the present invention improves above-mentioned protective circuit, can improve this safe problem.
The present invention proposes a kind of zero Firewire circuitry guard method adopting relay; relay switch as master switch is connected with zero line; the live wire end of load by respective load switch and live wire serial connection, loaded zero line side all pass through to connect with zero line as the relay switch of master switch.
As shown in Figure 2, zero Firewire circuitry protective circuit of employing relay of the present invention, the relay switch RY104 as master switch connects with zero line; The live wire end of load 1 is by load switch RY101 and live wire serial connection, and the zero line side of load 1 is connected with zero line by relay R Y104; The live wire end of load 2 is by load switch RY102 and live wire serial connection, and the zero line side of load 2 is connected with zero line by relay R Y104; The live wire end of load 3 is by load switch RY103 and live wire serial connection, and the zero line side of load 3 is connected with zero line by relay R Y104; All loads are parallel relationship, and their live wire end is by respective load switch and live wire serial connection, and their zero line side is connected with zero line by relay R Y104.
Further, load number can change, and is not limited to 3, and one or more load is also the zero Firewire circuitry protective circuit that can be suitable for employing relay of the present invention.
Further, the described relay switch as master switch comprises relay and control circuit.
Further, described load switch is relay switch or common mechanical switch.
Relay R Y104 as master switch is connected from changing into live wire serial connection with zero line, and load wiring mode is constant, like this, does not increase other devices.
When the controller of master switch is in holding state time, from accompanying drawing 2, the two ends of load disconnect completely with alternating current, and interference signal extraneous does not like this have impact to load.And the relay protection circuit of routine, no matter how zero live wire connects, and always has one end to be connected with alternating current.
Therefore; relay protection circuit of the present invention; except retaining original defencive function; can better protect when installation or the production test of controller manufacturer to complete system plant; as long as the switch of load is not opened; even if operating personnel have encountered load because of carelessness when operation, also do not have security incident.And this improvement can not increase any cost, be worth upgrading upgrading on original product.
Zero Firewire circuitry guard method of employing relay of the present invention, circuit and device, can be applied to the occasion such as small household appliances, Industry Control equally.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. adopt a zero Firewire circuitry guard method of relay, it is characterized in that: the relay switch as master switch is connected with zero line; The live wire end of load by respective load switch and live wire serial connection, loaded zero line side all pass through to connect with zero line as the relay switch of master switch; The described relay switch as master switch comprises relay and control circuit.
2. guard method according to claim 1, is characterized in that: described load switch is relay switch or common mechanical switch.
3. adopt a zero live wire protective circuit of relay, described circuit comprises a relay switch as master switch, load, load switch, it is characterized in that: the relay switch as master switch is connected with zero line; The live wire end of each load by respective load switch and live wire serial connection, loaded zero line side all pass through to connect with zero line as the relay switch of master switch; The described relay switch as master switch comprises relay and control circuit.
4. protective circuit according to claim 3, is characterized in that: described load switch is relay switch or common mechanical switch.
5. a device, described device comprises electronic circuit, it is characterized in that, described electronic circuit comprises zero live wire protective circuit of the employing relay as described in claim 3 or 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210007216.1A CN102545142B (en) | 2012-01-11 | 2012-01-11 | Adopt zero Firewire circuitry guard method of relay, circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210007216.1A CN102545142B (en) | 2012-01-11 | 2012-01-11 | Adopt zero Firewire circuitry guard method of relay, circuit and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102545142A CN102545142A (en) | 2012-07-04 |
| CN102545142B true CN102545142B (en) | 2016-02-24 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210007216.1A Expired - Fee Related CN102545142B (en) | 2012-01-11 | 2012-01-11 | Adopt zero Firewire circuitry guard method of relay, circuit and device |
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| CN (1) | CN102545142B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107992148A (en) * | 2016-10-26 | 2018-05-04 | 泰科电子(上海)有限公司 | AC load control module |
| CN106981785B (en) * | 2017-04-25 | 2023-04-14 | 广东百事泰医疗器械股份有限公司 | Power interface on-off control circuit and safety power supply device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101114769A (en) * | 2006-07-27 | 2008-01-30 | 鸿富锦精密工业（深圳）有限公司 | Electric equipment protecting means |
| CN201243203Y (en) * | 2008-07-25 | 2009-05-20 | 比亚迪股份有限公司 | Safety protection device for electric appliance |
| CN101465536A (en) * | 2007-12-19 | 2009-06-24 | 张飞然 | Automatic judgment unit corrector for inverse connection of phase line zero line |
| CN201523129U (en) * | 2009-11-18 | 2010-07-07 | 修志平 | Full-shutdown computer socket |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0718911D0 (en) * | 2007-09-28 | 2007-11-07 | Chilvers Graham | Power isolator |
| CN201122833Y (en) * | 2007-11-19 | 2008-09-24 | 海尔集团公司 | Micro-controlled electricity-saving protection device |
| CN101630149B (en) * | 2009-02-24 | 2012-06-06 | 莱得圣智能科技（上海）有限公司 | Digital multi-point switch control circuit system and controller thereof |
-
2012
- 2012-01-11 CN CN201210007216.1A patent/CN102545142B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114769A (en) * | 2006-07-27 | 2008-01-30 | 鸿富锦精密工业（深圳）有限公司 | Electric equipment protecting means |
| CN101465536A (en) * | 2007-12-19 | 2009-06-24 | 张飞然 | Automatic judgment unit corrector for inverse connection of phase line zero line |
| CN201243203Y (en) * | 2008-07-25 | 2009-05-20 | 比亚迪股份有限公司 | Safety protection device for electric appliance |
| CN201523129U (en) * | 2009-11-18 | 2010-07-07 | 修志平 | Full-shutdown computer socket |
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| CN102545142A (en) | 2012-07-04 |
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Granted publication date: 20160224 Termination date: 20220111 |