CN104008937A - Leakage protection switch without ground wire - Google Patents
Leakage protection switch without ground wire Download PDFInfo
- Publication number
- CN104008937A CN104008937A CN201310056943.1A CN201310056943A CN104008937A CN 104008937 A CN104008937 A CN 104008937A CN 201310056943 A CN201310056943 A CN 201310056943A CN 104008937 A CN104008937 A CN 104008937A
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- China
- Prior art keywords
- ground wire
- electrical appliance
- protection switch
- power supply
- leakage protection
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a leakage protection switch without a ground wire. The leakage protection switch belongs to the technical field of a safe electrical device. A technical problem which needs to be solved is that an unbalanced leakage protection switch needs to use a ground wire or under a condition that a ground wire is not used, unbalanced current is needed to realize tripping disconnection and thus disadvantages of the unbalanced leakage protection switch are made up for. Main technical characteristics are that the leakage protection switch is provided with a cut-off device, a start power supply of which is formed by an electric-appliance casing and a zero line. If a live wire of the electric appliance leaks electricity to the electric-appliance casing, the cut-off device is started by the power supply and cuts off the whole electric appliance and the power supply of the cut-off device. The main purpose of the leakage protection switch without the ground wire is that the leakage protection switch is applicable to civil and industrial power use security under different kinds of conditions without any ground wire.
Description
Technical field
The present invention relates to a kind of safety utilization of electric power device.
Background technology
Existing earth leakage circuit-breaker; main flow is residual current mutual inductance type, is that the unsymmetrical current signal that instrument transformer produces when circuit is leaked electricity by electronic circuit amplifies, and then starts tripping gear; deenergization; its shortcoming is to have a ground wire, or the electrical appliance earthing of casing, or contact could produce unsymmetrical current when human body; there is no the outdated building of ground wire for some; when electrical appliance body leakage, need human body to contact the power-off of could tripping, at this moment human electric shock's danger occurred.
Object of the present invention designs in order to address this problem, thinking is in the situation that there is no ground wire, in the situation that not using electrical appliance, even if live wire leaks electricity to the also power-off immediately automatically of shell of electrical appliance, and the power-off of just tripping need not wait until human body contact electrical appliance shell time is accomplished to prevent trouble before it happens.
Summary of the invention
The present invention design without ground wire earth leakage circuit-breaker; have a shearing device, this shearing device starts power supply and derives from electrical appliance shell and zero line, if electrical appliance live wire leaks off to electrical appliance shell; shearing device obtains power initiation, cuts off the power supply of whole electrical appliance and shearing device itself.
For implementing above-mentioned design concept, the technical solution used in the present invention is: a kind of without ground wire earth leakage circuit-breaker, it is characterized in that: there is a shearing device, this shearing device starts power supply and derives from electrical appliance shell and zero line, if electrical appliance live wire leaks off to electrical appliance shell, shearing device obtains power initiation, cuts off the power supply of whole electrical appliance and shearing device itself; Described without ground wire earth leakage circuit-breaker, it is characterized in that, shearing device has a cut-off relay, cut-off relay obtained from the power supply of electrical appliance shell and moved electric leakage time, disconnect the power supply of electromagnet, electromagnet loses magnetic force and discharges iron block, and master switch disconnects under the pulling force of spring; The described shearing device of stating, unless again manually make switch reset, cutting-off process is irreversible; Described cut-off relay includes but not limited to mechanical or electronic type or photoelectricity minor.
Beneficial effect
Existing earth leakage circuit-breaker; main flow is residual current mutual inductance type, is that the unsymmetrical current signal that instrument transformer produces when circuit is leaked electricity by electronic circuit amplifies, and then starts tripping gear; deenergization; its shortcoming is to have a ground wire, or the electrical appliance earthing of casing, or contact could produce unsymmetrical current when human body; there is no the outdated building of ground wire for some; when electrical appliance body leakage, need human body to contact the power-off of could tripping, at this moment human electric shock's danger occurred.The invention has the beneficial effects as follows, in the situation that there is no ground wire, in the situation that not using electrical appliance, even if live wire leaks electricity to the also power-off immediately automatically of shell of electrical appliance, and the power-off of just tripping need not wait until human body contact electrical appliance shell time is accomplished to prevent trouble before it happens.
Brief description of the drawings
Fig. 1 is building-block of logic of the present invention.
Embodiment
With reference to Fig. 1, zero line 6 and live wire 8, from left side access, connect the binding post 7 of electrical appliance 5 after master switch 10, power to electrical appliance, separate the input of wiring cut-off relay 3 in parallel simultaneously, also have a wire from electrical appliance shell 4 also to connect the input of cut-off relay 3; Cut-off relay 3 outputs connect electromagnet 2, when leakproof, power to electromagnet 2, make electromagnet 2 obtain magnetic and hold the iron block 12 being connected with collets 11 on master switch 10, make master switch 10 closures of whole system, design electromagnet 2 is greater than spring 9 pulling force round about to the suction of iron block 12, and master switch 10 is just always in closure state; Once electrical appliance 5 live wires 8 leak off to electrical appliance shell 4, cut-off relay 3 obtains startup power supply and starts, the power supply supply of tripping magnet 2, stop powering to electromagnet 2, electromagnet 2 disappears to the suction of iron block 12, and master switch 10 disconnects under the pulling force of spring 9, and at this moment whole electrical appliance 5 and shearing device 1 power supply own are all cut off, unless again manually make switch reset, otherwise cutting-off process is irreversible.
The whole making without ground wire earth leakage circuit-breaker is simple and reliable, and cut-off relay can use ready-made A.C. contactor, also can self manufacture, and this embodiment is practical.
Claims (4)
1. one kind without ground wire earth leakage circuit-breaker; it is characterized in that: there is a shearing device (1); this shearing device starts power supply and derives from electrical appliance shell (4) and zero line (6); if electrical appliance (5) live wire (8) leaks off to electrical appliance shell (4); shearing device (1) obtains power initiation, cuts off the power supply of whole electrical appliance (5) and shearing device (1) itself.
2. as claimed in claim 1 without ground wire earth leakage circuit-breaker; it is characterized in that; shearing device (1) has a cut-off relay (3); electric leakage time cut-off relay (3) obtains from the power supply of electrical appliance shell (4) and moves; disconnect the power supply of electromagnet (2); electromagnet (2) loses magnetic force and discharges iron block (12), and master switch (10) disconnects under the pulling force of spring (9).
3. the shearing device of stating as claimed in claim 1 (1), unless again manually make switch reset, cutting-off process is irreversible.
As claim 2 or as described in cut-off relay include but not limited to mechanical or electronic type or photoelectricity minor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310056943.1A CN104008937A (en) | 2013-02-25 | 2013-02-25 | Leakage protection switch without ground wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310056943.1A CN104008937A (en) | 2013-02-25 | 2013-02-25 | Leakage protection switch without ground wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104008937A true CN104008937A (en) | 2014-08-27 |
Family
ID=51369556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310056943.1A Pending CN104008937A (en) | 2013-02-25 | 2013-02-25 | Leakage protection switch without ground wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104008937A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110974021A (en) * | 2019-09-26 | 2020-04-10 | 杭州为我健康新零售科技有限公司 | Electric leakage protection system and electric leakage protection method suitable for honey beverage vending machine |
| CN112421572A (en) * | 2020-12-02 | 2021-02-26 | 中申(宁波)电力科技有限公司 | Leakage protection switch with activation circuit and installation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064571A (en) * | 1991-03-02 | 1992-09-16 | Abb专利有限公司 | Earth-leakage circuit breaker |
| EP1014413A2 (en) * | 1998-12-24 | 2000-06-28 | ABB Ricerca SpA | Electronic driving circuit for a bistable actuator |
| CN2476096Y (en) * | 2001-03-15 | 2002-02-06 | 殷宪军 | Zero line-breaking protector |
| CN101034645A (en) * | 2006-03-06 | 2007-09-12 | 三菱电机株式会社 | Electric leakage breaker |
| CN101620961A (en) * | 2008-06-30 | 2010-01-06 | 通领科技集团有限公司 | Novel leakage current detection breaker |
-
2013
- 2013-02-25 CN CN201310056943.1A patent/CN104008937A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064571A (en) * | 1991-03-02 | 1992-09-16 | Abb专利有限公司 | Earth-leakage circuit breaker |
| EP1014413A2 (en) * | 1998-12-24 | 2000-06-28 | ABB Ricerca SpA | Electronic driving circuit for a bistable actuator |
| CN2476096Y (en) * | 2001-03-15 | 2002-02-06 | 殷宪军 | Zero line-breaking protector |
| CN101034645A (en) * | 2006-03-06 | 2007-09-12 | 三菱电机株式会社 | Electric leakage breaker |
| CN101620961A (en) * | 2008-06-30 | 2010-01-06 | 通领科技集团有限公司 | Novel leakage current detection breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110974021A (en) * | 2019-09-26 | 2020-04-10 | 杭州为我健康新零售科技有限公司 | Electric leakage protection system and electric leakage protection method suitable for honey beverage vending machine |
| CN112421572A (en) * | 2020-12-02 | 2021-02-26 | 中申(宁波)电力科技有限公司 | Leakage protection switch with activation circuit and installation method and application thereof |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140827 |