CN107946150A - A kind of leakage circuit breakers - Google Patents
A kind of leakage circuit breakers Download PDFInfo
- Publication number
- CN107946150A CN107946150A CN201711393476.6A CN201711393476A CN107946150A CN 107946150 A CN107946150 A CN 107946150A CN 201711393476 A CN201711393476 A CN 201711393476A CN 107946150 A CN107946150 A CN 107946150A
- Authority
- CN
- China
- Prior art keywords
- terminal
- proportional amplifier
- resistor
- circuit
- connection
- 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.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
Landscapes
- Breakers (AREA)
Abstract
The present invention relates to a kind of leakage circuit breakers, including pedestal, lower connecting terminal, zero sequence current mutual inductor, the conducting wire that is flexible coupling, buckle releaser, operating mechanism, moving contact, static contact, arc-chutes, upper connecting terminal, plastic shell；Mainly buckle releaser connects an electronics trip gear；The electronics trip gear is by signal amplification circuit, magnetic silicon controlled switch circuit, electromagnetic control apparatus forms, signal amplification circuit includes proportional amplifier, input signal adjuster, the input terminal of input signal adjuster is connected by the secondary winding of rectification circuit and zero sequence current mutual inductor, the output terminal of input signal adjuster is connected with proportional amplifier input terminal, the output terminal of proportional amplifier and the control terminal of magnetic silicon controlled switch circuit connect, the electromagnetic coil of electromagnetic control apparatus is connected with magnetic silicon controlled switch circuit, magnetic core one end of electromagnetic control apparatus and the control stick of buckle releaser connect.The advantages that short with arcing, drop-away current adjusts, and dropout precision is high, and security performance is reliable.
Description
Technical field
The invention belongs to Low Voltage Electrical Apparatus, specifically on a kind of leakage circuit breakers.
Background technology
Leakage circuit breakers, is mainly used in AC-DC Circuit, is used as distribution or electromotor overload, short circuit, under-voltage and over-pressed
Protection switch and normal operating condition under be used as the infrequently connection and disjunction of circuit.Existing plastic enclosure leakage circuit breaker
Generally use air blowout room, spring complex triip.Its main shortcoming is：Trip arcing length, drop-away current stability
Difference, dropout precision is low, poor to the person and equipment safety protection reliability.
The content of the invention
The purpose of the present invention is in view of the deficienciess of the prior art, a kind of tripping arcing of offer is short, drop-away current is adjustable
Section, stability are good, and dropout precision is high, to the person and the reliable leakage circuit breakers of equipment safety protective value.
Technical scheme include pedestal, lower connecting terminal, zero sequence current mutual inductor, the conducting wire that is flexible coupling, buckle releaser,
Operating mechanism, moving contact, static contact, arc-chutes, upper connecting terminal, plastic shell, one end of moving contact is located at static contact goes out
In arc chamber, the other end is connected with the conducting wire one end that is flexible coupling, and the conducting wire other end that is flexible coupling passes through lower connection busbar and lower connecting terminal
Connection, zero sequence current mutual inductor are installed on lower connection busbar, and static contact is connected by upper connection busbar with upper connecting terminal, is moved
Buckle releaser and operating mechanism are connected on contact；Mainly buckle releaser connects an electronics trip gear；The electronics trip gear by
Signal amplification circuit, magnetic silicon controlled switch circuit, electromagnetic control apparatus composition, signal amplification circuit include proportional amplifier, input
Signal conditioner, the input terminal of input signal adjuster are connected with the both ends of zero sequence current mutual inductor secondary winding, input signal
The output terminal of adjuster is connected with proportional amplifier positive input terminal, the control of the output terminal and magnetic silicon controlled switch circuit of proportional amplifier
End processed connection, the electromagnetic coil of electromagnetic control apparatus are connected with magnetic silicon controlled switch circuit, magnetic core one end of electromagnetic control apparatus and
The control stick connection of buckle releaser；The input signal adjuster is made of first resistor and first resistor device, and the one of first resistor
End is connected with one end of zero sequence current mutual inductor secondary winding, and the other end is connected with proportional amplifier positive input terminal, first resistor
Device is connected with diode cathode, and diode cathode is connected with proportional amplifier positive input terminal, the other end and the electricity of first resistor device
Source common port connection；The magnetic silicon controlled switch circuit is by resistor voltage divider circuit with Group of Silicon Controlled Rectifier into resistor voltage divider circuit is by the 3rd
The series arm of resistance and the 4th resistance composition, is connected between the output terminal of proportional amplifier and power supply common port, silicon-controlled
Grid and 3rd resistor and the 4th resistance between node connection, silicon-controlled cathode and cathode are connected in series with electromagnetic coil
Second resistance device, ratio enlargement are connected between the negative input end and output terminal of proportional amplifier between positive pole and common port
Second resistance is connected between device and power supply common port.
It is an advantage of the invention that using electronic trip unit and vacuum interrupter, arcing is short during dropout, and drop-away current adjusts,
Dropout precision is high, reliable to the person and equipment safety protective value.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the circuit diagram of electronics trip gear of the present invention.
Embodiment
Leakage circuit breakers as shown in Figure 1, including pedestal 1, lower connecting terminal 2, zero sequence current mutual inductor 3, be flexible coupling and lead
Line 4, buckle releaser, operating mechanism 6, moving contact 7, static contact 8, arc-chutes 9, upper connecting terminal 10 and plastic shell, moving contact 7
One end is located in arc-chutes with static contact 8, and the other end is connected with 4 one end of conducting wire that is flexible coupling, and is flexible coupling 4 other end of conducting wire under
Connection busbar is connected with lower connecting terminal 2, and zero sequence current mutual inductor 3 is installed on lower connection busbar, and static contact 8 passes through upper connection
Busbar is connected with upper connecting terminal 10, connection buckle releaser and operating mechanism on moving contact 7, and the structure of buckle releaser and operating mechanism is
Known technology, is not described in detail herein；Buckle releaser connects an electronics trip gear 5, and arc-chutes 9 use vacuum interrupter, carry
High arc extinction performance, shortens arcing；The electronics trip gear 5 is filled by signal amplification circuit, magnetic silicon controlled switch circuit, Electromagnetic Control
Composition is put, signal amplification circuit includes proportional amplifier A, input signal adjuster, the input terminal connection of input signal adjuster
The both ends of 3 secondary winding of zero sequence current mutual inductor, the output terminal of input signal adjuster are connected with proportional amplifier A input terminals,
The output current of the secondary winding of zero sequence current mutual inductor 3 is after the adjusting of input signal adjuster, input proportional amplifier input
End, realizes the adjusting to drop-away current setting value.The output of proportional amplifier and the control terminal of magnetic silicon controlled switch circuit connect, will
The secondary winding of zero sequence current mutual inductor 3 output signal amplification after control it is silicon-controlled, improve dropout precision and to the person, equipment
Protection reliability.
The electromagnetic coil CZ of electromagnetic control apparatus is connected to positive pole and common port after connecting with magnetic silicon controlled switch circuit
Between, magnetic core one end of electromagnetic control apparatus and the control stick of buckle releaser connect；When controlled silicon conducting, electromagnetic coil obtain it is electric,
Magnetic core promotes control stick buckle releaser is threaded off.The input signal adjuster is made of first resistor R1 and first resistor device W1,
One end of first resistor R1 is connected with one end of 3 secondary winding of zero sequence current mutual inductor, and the other end is just defeated with proportional amplifier A's
Enter end, first resistor device W1 one end is connected with diode D anode, and diode D cathodes and the positive input terminal of proportional amplifier A connect
Connect, the other end of first resistor device W1 is connected with power supply common port；The magnetic silicon controlled switch circuit is by resistor voltage divider circuit and can
Silicon K compositions are controlled, the series arm that resistor voltage divider circuit is made of 3rd resistor R3 and the 4th resistance R4, the series arm is connected to
Between the output terminal and power supply common port of proportional amplifier A, between the grid and 3rd resistor R3 and the 4th resistance R4 of silicon-controlled K
Node connection, the cathode and cathode of silicon-controlled K and electromagnetic coil CZ be connected in series in positive pole V+ and power supply common port it
Between, second resistance device W2, proportional amplifier A and power supply common port are connected between the negative input end and output terminal of proportional amplifier A
Between connect second resistance R2.
Claims (1)
1. a kind of leakage circuit breakers, including pedestal（1）, lower connecting terminal（2）, zero sequence current mutual inductor（3）, be flexible coupling conducting wire
（4）, buckle releaser, operating mechanism（6）, moving contact（7）, static contact（8）, arc-chutes（9）, upper connecting terminal（10）Outside plastics
Shell, moving contact（7）One end and static contact（8）In arc-chutes, the other end and the conducting wire that is flexible coupling（4）One end connects, soft company
Connect conducting wire（4）The other end passes through lower connection busbar and lower connecting terminal（2）Connection, zero sequence current mutual inductor（3）Installed in lower company
Connect on busbar, static contact（8）Pass through upper connection busbar and upper connecting terminal（10）Connection, moving contact（7）It is upper connection buckle releaser and
Operating mechanism；It is characterized in that buckle releaser connects an electronics trip gear（5）, arc-chutes（9）Using vacuum interrupter；The electronics
Trip gear（5）Be made of signal amplification circuit, magnetic silicon controlled switch circuit, electromagnetic control apparatus, signal amplification circuit include than
Example amplifier（A）, input signal adjuster, input signal adjuster input terminal connection zero sequence current mutual inductor（3）It is secondary around
The both ends of group, the output terminal and proportional amplifier of input signal adjuster（A）Input terminal connect, the output of proportional amplifier with can
The control terminal connection of transwitch circuit is controlled, magnetic core one end of electromagnetic control apparatus and the control stick of buckle releaser connect；The input
Signal conditioner is by first resistor（R1）And first resistor device（W1）Composition, first resistor（R1）One end and zero sequence current mutual inductance
Device（3）One end connection of secondary winding, the other end and proportional amplifier（A）Positive input terminal, first resistor device（W1）One end with
Diode（D）Anode connects, diode（D）Cathode and proportional amplifier（A）Positive input terminal connection, first resistor device（W1）'s
The other end is connected with power supply common port；The magnetic silicon controlled switch circuit is by resistor voltage divider circuit and silicon-controlled（K）Composition, resistance point
Volt circuit is by 3rd resistor（R3）With the 4th resistance（R4）The series arm of composition, the series arm are connected to proportional amplifier
（A）Output terminal and power supply common port between, it is silicon-controlled（K）Grid and 3rd resistor（R3）With the 4th resistance（R4）Between
Node connects, silicon-controlled（K）Cathode and cathode and electromagnetic coil（CZ）It is connected in series in positive pole（V+）It is public with power supply
Between end, proportional amplifier（A）Negative input end and output terminal between connect second resistance device（W2）, proportional amplifier（A）With
Second resistance is connected between power supply common port（R2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711393476.6A CN107946150A (en) | 2017-12-21 | 2017-12-21 | A kind of leakage circuit breakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711393476.6A CN107946150A (en) | 2017-12-21 | 2017-12-21 | A kind of leakage circuit breakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107946150A true CN107946150A (en) | 2018-04-20 |
Family
ID=61941614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711393476.6A Withdrawn CN107946150A (en) | 2017-12-21 | 2017-12-21 | A kind of leakage circuit breakers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107946150A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202210499U (en) * | 2011-09-20 | 2012-05-02 | 胡俊兵 | Low voltage plastic housing intelligent breaker |
| CN203192717U (en) * | 2013-04-03 | 2013-09-11 | 杭州申月电气有限公司 | Electronic type plastic housing breaker |
| CN203931970U (en) * | 2014-06-30 | 2014-11-05 | 温州罗格朗电器有限公司 | The extremely breakable monolithic devices residual current circuit breaker of a kind of N |
| CN105048207A (en) * | 2015-07-07 | 2015-11-11 | 深圳市良辉科技有限公司 | Earth leakage protection plug |
| CN106655085A (en) * | 2016-08-31 | 2017-05-10 | 兰溪市中冠电气科技有限公司 | Grounding protection apparatus preventing personal electric shock |
| CN106898999A (en) * | 2015-12-21 | 2017-06-27 | 天津市鸿远电气股份有限公司 | A kind of breaker protected with anti-virtual connection, earth leakage protective, fault electric arc |
| CN206293359U (en) * | 2016-12-30 | 2017-06-30 | 齐齐哈尔工程学院 | A kind of breaker |
-
2017
- 2017-12-21 CN CN201711393476.6A patent/CN107946150A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202210499U (en) * | 2011-09-20 | 2012-05-02 | 胡俊兵 | Low voltage plastic housing intelligent breaker |
| CN203192717U (en) * | 2013-04-03 | 2013-09-11 | 杭州申月电气有限公司 | Electronic type plastic housing breaker |
| CN203931970U (en) * | 2014-06-30 | 2014-11-05 | 温州罗格朗电器有限公司 | The extremely breakable monolithic devices residual current circuit breaker of a kind of N |
| CN105048207A (en) * | 2015-07-07 | 2015-11-11 | 深圳市良辉科技有限公司 | Earth leakage protection plug |
| CN106898999A (en) * | 2015-12-21 | 2017-06-27 | 天津市鸿远电气股份有限公司 | A kind of breaker protected with anti-virtual connection, earth leakage protective, fault electric arc |
| CN106655085A (en) * | 2016-08-31 | 2017-05-10 | 兰溪市中冠电气科技有限公司 | Grounding protection apparatus preventing personal electric shock |
| CN206293359U (en) * | 2016-12-30 | 2017-06-30 | 齐齐哈尔工程学院 | A kind of breaker |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180420 |
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| WW01 | Invention patent application withdrawn after publication |