CN2382128Y - Breaker against electric leakage and fire - Google Patents
Breaker against electric leakage and fire Download PDFInfo
- Publication number
- CN2382128Y CN2382128Y CN 99219325 CN99219325U CN2382128Y CN 2382128 Y CN2382128 Y CN 2382128Y CN 99219325 CN99219325 CN 99219325 CN 99219325 U CN99219325 U CN 99219325U CN 2382128 Y CN2382128 Y CN 2382128Y
- Authority
- CN
- China
- Prior art keywords
- diode
- circuit
- utility
- model
- resistance
- 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
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a breaker for preventing electric leakage and fire, comprising a zero sequence current mutual inductor, an overvoltage protection circuit, a trigger executive circuit, and a test circuit. The utility model is characterized in that the utility model also comprises a current/voltage convertor, a filter circuit, and an overcurrent three-stage time sharing operation protection circuit, and is also provided with an electric leakage protection circuit. The utility model has the functions of overcurrent three-stage time sharing operation protection, electric leakage, short circuit, and over-voltage protection. When used in three-phase electric equipment, the utility model also has the protection function of phase failure (lack). The utility model has the advantages of safe work and reasonable design. The utility model can quickly cut off trouble power supper, effectively protect the normal running of electric lines and equipment, and prevent the electric accident and the electrical fire. The utility model is suitable for controlling and protecting the electric lines and the equipment under low voltage AC 500V.
Description
The utility model relates to electric equipment, especially relates to a kind of fire prevention residual current circuit breaker that is used to prevent electrical fire and electric accident generation.
Circuit breaker has been widely used in the various electric equipments at present, to preventing playing an important role of electrical fire and electric accident.Bimetal leaf overtemperature protection formula breaker protection function singleness is subjected to environment for use temperature effect big, causes overcurrent action protection characteristic error big, and often disconnected not switch power supply is difficult to reach effective control protective effect when line facility produces overload, overcurrent; Electromagnetism current-limiting protection formula circuit breaker then is difficult to and induction reactance matched in service; too small as the apolegamy of turn-off current operating value; then induction reactance equipment is difficult to start; excessive as the apolegamy of turn-off current operating value; then can lose normal protection to operating circuit, apparatus overload; this type of circuit breaker causes the design of the shell frame grade rated current of circuit breaker to be obstructed because of the volume that is subjected to the overcurrent magnetictrip influences, and is difficult to rise increase.When all easily producing overcurrent in actual motion, these two kinds single overcurrent protection formula circuit breakers are failure to actuate or misoperation causes circuit in service, apparatus overload to lose normal protection; circuit, apparatus overload (overcurrent) heating; make insulation damages cause that short circuit burns, produce kind of a fire and cause electrical fire.Granted publication number just only has overvoltage, creepage protection function for the Chinese patent of CN2145468Y " residual current circuit breaker with overvoltage protection "; when circuit in service, equipment produce overload overcurrent, short-circuit conditions, then do not shield, can't stop because of the electric accident of overcurrent generation and the generation of electrical fire.
The purpose of this utility model is to provide a kind of have simultaneously overvoltage, overcurrent, electric leakage, short-circuit protection function, safe and reliable, the fire prevention residual current circuit breaker that can effectively prevent electric accident and electrical fire.
The purpose of this utility model is achieved in that the utility model comprises zero sequence current mutual inductor, excess voltage protection, triggering executive circuit and hookup, and feature is also to comprise current-to-voltage converter, filter circuit and three sections timesharing action protections of overcurrent circuit.
The utility model also comprises leakage protection circuit.
The utility model is because on the basis of overvoltage, leakage protection circuit; also specialized designs current-to-voltage converter, filter circuit and three sections timesharing action protections of overcurrent circuit, so just make overcurrent that the utility model partly reaches long delay, short time delay (inverse time lag), instantaneous (short circuit) or specified time, inverse time lag, instantaneous (short circuit) to overcurrent action protection function at times.The utility model has also designed leakage protection circuit, leakage current value at 500mA with the interior instantaneous operation protection of all can realizing leaking electricity; Also has disconnected (lacking) phase defencive function being used for the three-phase power consumption equipment.The utility model adopts electronic technology to realize overvoltage, three sections timesharing actions of overcurrent simultaneously, breaks (lacking) thereby the mechanical action of phase, electric leakage, short-circuit protection function control strong power part the trouble power in the turn-off current.It adjusts combination with operating value, the operating characteristics of every defencive function; play the backup protection effect organic coordination; it is reasonable in design, stable work in work, reliable in action, opening speed are fast, safe in utilization, disjunction emergency power supply fast; can protect operating circuit, equipment effectively; prevent the generation of electric accident and electrical fire; be applicable to the circuit that low-voltage alternating-current 500V is following, the control protection of equipment.
Fig. 1 is circuit theory diagrams of the present utility model.
Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.
The utility model is by zero sequence current mutual inductor LCT, current-to-voltage converter CTA, excess voltage protection, filter circuit, and three sections timesharing action protections of overcurrent circuit, leakage protection circuit, triggering executive circuit and hookup are formed.
Filter circuit is by diode D
11With polar capacitor C
5Form.
Three sections timesharing action protections of overcurrent circuit is by voltage stabilizing didoe D
8, D
9, diode D
7, D
10, polar capacitor C
4, resistance R
5, adjustable resistance W
2Form.
Leakage protection circuit is by diode D
6, capacitor C
2, C
3, resistance R
4, adjustable resistance W
1Form.
Excess voltage protection is by bi-directional voltage stabilizing diode D
5, resistance R
2, R
3, voltage C
1Form.
Trigger executive circuit by controllable silicon SCR, four diode D
1～D
4, piezo-resistance RV, electromagnetic trip coil Q form.
Hookup is by K switch, resistance R
1Form.
Any one among phase line among the civil power 380V or the 220V is passed current-to-voltage converter CTA, an end TA of the secondary coil of current-to-voltage converter CTA from the centre
1Ground connection, other end TA
2Meet diode D
11Anode, diode D
11Negative electrode meet polar capacitor C
5Positive pole, capacitor C
5Minus earth, adjustable resistance W
2Be connected in parallel on capacitor C
5Two ends, diode D
10Anode and voltage stabilizing didoe D
8The public terminating diode D of anode
11Negative electrode, resistance R
5A termination voltage stabilizing didoe D
8Negative electrode, another termination voltage stabilizing didoe D
9Cathode and polar capacitor C
4The common port of positive pole, polar capacitor C
4Minus earth, voltage stabilizing didoe D
9Anode meet diode D
7Anode, diode D
7Negative electrode and diode D
10The control utmost point of public termination controllable silicon SCR of negative electrode.
Civil power 380V three-phase and four-line formula is that neutral line of three phase lines is that four lines or phase three-wire three formula are that three phase lines or single-phase 220V formula are that two lines pass zero sequence current mutual inductor LCT from the centre altogether, an end T of the secondary coil of zero sequence current mutual inductor LCT
1Ground connection, other end T
2Connecting resistance R
4An end, resistance R
4Another terminating diode D
6Anode, diode D
6Negative electrode connect the control utmost point of controllable silicon SCR, capacitor C
3With adjustable resistance W
1Two ends all be connected in parallel on diode D
6Anode and ground between, capacitor C
2Two ends be connected in parallel on diode D
6Cathode and ground between.
Resistance R
2Anode, the other end and the resistance R of a termination controllable silicon SCR
3Series connection back ground connection, capacitor C
1With resistance R
3Parallel connection, bi-directional voltage stabilizing diode D
5A terminating resistor R
2And resistance R
3The common port that connects, the control utmost point of another termination controllable silicon SCR, the minus earth of controllable silicon SCR.
Four diode D
1～D
4Form rectification circuit, piezo-resistance RV plays the misoperation that shockproof wave instantaneous overvoltage and indirect lightning strike cause.Resistance R
1Be test resistance, K switch is the test button switch.
Regulate voltage regulation resistance W
2, and select the voltage stabilizing didoe D of different voltage stabilizing values for use
8, D
9Can obtain the different load current values of required setting respectively and the current value that sets is carried out the overcurrent long delay respectively, short time delay (inverse time lag), instantaneous (short circuit) or specified time; inverse time lag, three sections timesharing action protections of overcurrent function of instantaneous (short circuit).
When overcurrent fault occurring among the load L, current-to-voltage converter CTA detects overcurrent signal, produces a voltage signal through diode D at secondary coil then
11, capacitor C
5The filter circuit filtering of forming, this voltage signal is proportional to overcurrent signal, when being instantaneous large-current (short circuit) as overcurrent, then through filtered voltage signal directly through diode D
10To the control utmost point of controllable silicon SCR, trigger controllable silicon SCR, make the controllable silicon SCR conducting, electromagnetic trip coil Q action, deenergization; As electric current is general overcurrent, and then voltage signal is through voltage stabilizing didoe D
8, resistance R
5Give polar capacitor C
4Charging, capacitor C
4After the voltage at two ends reaches certain value, again through resistance R
5, voltage stabilizing didoe D
8, two utmost point D
10To the control utmost point of controllable silicon SCR, trigger controllable silicon SCR, electromagnetic trip coil Q action, deenergization; As overcurrent is big overcurrent, and then voltage signal is through voltage-stabiliser tube D
8, resistance R
5Give polar capacitor C
4Charging, capacitor C
4After the voltage at two ends reaches certain value, again through voltage stabilizing didoe D
9, diode D
7To the control utmost point of controllable silicon SCR, trigger controllable silicon SCR, electromagnetic trip coil Q action, deenergization.
When leakage current occurring among the load L, zero sequence current mutual inductor LCT detects unsymmetrical current, and secondary coil produces voltage signal, through resistance R
4, diode D
6To the control utmost point of controllable silicon SCR, controllable silicon SCR triggers, electromagnetic trip coil Q action, deenergization.
Claims (2)
1, a kind of fire prevention residual current circuit breaker; comprise zero sequence current mutual inductor (LCT), excess voltage protection, triggering executive circuit and hookup; it is characterized in that: also comprise current-to-voltage converter (CTA), filter circuit and three sections timesharing action protections of overcurrent circuit, wherein filter circuit is by diode (D
11) and polar capacitor (C
5) form, three sections timesharing action protections of overcurrent circuit is by voltage stabilizing didoe (D
8), (D
9), diode (D
7), (D
10), polar capacitor (C
4), resistance (R
5), adjustable resistance (W
2) form, any one among the civil power 380V among phase line or the 220V is passed current-to-voltage converter (CTA), an end (TA of the secondary coil of current-to-voltage converter (CTA) from the centre
1) ground connection, the other end (TA
2) meet diode (D
11) anode, diode (D
11) negative electrode meet polar capacitor (C
5) positive pole, electric capacity (C
5) minus earth, adjustable resistance (W
2) be connected in parallel on electric capacity (C
5) two ends, diode (D
10) anode and voltage stabilizing didoe (D
8) the public terminating diode (D of anode
11) negative electrode, resistance (R
5) a termination voltage stabilizing didoe (D
8) negative electrode, another termination voltage stabilizing didoe (D
9) cathode and polar capacitor (C
4) the common port of positive pole, polar capacitor (C
4) minus earth, voltage stabilizing didoe (D
9) anode meet diode (D
7) anode, diode (D
7) negative electrode and diode (D
10) the control utmost point of public termination controllable silicon (SCR) of negative electrode.
2, fire prevention residual current circuit breaker as claimed in claim 1 is characterized in that: also comprise leakage protection circuit, it is by diode (D
6), electric capacity (C
2), (C
3), resistance (R
4), adjustable resistance (W
1) form, civil power 380V three-phase and four-line formula is that neutral line of three phase lines is that four lines or phase three-wire three formula are that three phase lines or single-phase 220V formula are that two lines pass zero sequence current mutual inductor (LCT) from the centre altogether, an end (T of the secondary coil of zero sequence current mutual inductor (LCT)
1) ground connection, the other end (T
2) connecting resistance (R
4) an end, resistance (R
4) another terminating diode (D
6) anode, diode (D
6) negative electrode connect the control utmost point of controllable silicon (SCR), electric capacity (C
3) and adjustable resistance (W
1) two ends all be connected in parallel on diode (D
6) anode and ground between, electric capacity (C
2) two ends be connected in parallel on diode (D
6) cathode and ground between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99219325 CN2382128Y (en) | 1999-08-18 | 1999-08-18 | Breaker against electric leakage and fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99219325 CN2382128Y (en) | 1999-08-18 | 1999-08-18 | Breaker against electric leakage and fire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2382128Y true CN2382128Y (en) | 2000-06-07 |
Family
ID=34010276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99219325 Expired - Fee Related CN2382128Y (en) | 1999-08-18 | 1999-08-18 | Breaker against electric leakage and fire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2382128Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950945A (en) * | 2010-09-08 | 2011-01-19 | 郭勒铭 | Fireproof intelligent circuit breaker for dynamic detection, static detection and zero cutoff |
| CN101976815A (en) * | 2010-09-29 | 2011-02-16 | 厦门振泰成科技有限公司 | Loaded multifunctional protection circuit |
-
1999
- 1999-08-18 CN CN 99219325 patent/CN2382128Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950945A (en) * | 2010-09-08 | 2011-01-19 | 郭勒铭 | Fireproof intelligent circuit breaker for dynamic detection, static detection and zero cutoff |
| CN101950945B (en) * | 2010-09-08 | 2014-01-08 | 郭勒铭 | Fireproof intelligent circuit breaker for dynamic detection, static detection and zero cutoff |
| CN101976815A (en) * | 2010-09-29 | 2011-02-16 | 厦门振泰成科技有限公司 | Loaded multifunctional protection circuit |
| CN101976815B (en) * | 2010-09-29 | 2013-06-12 | 厦门振泰成科技有限公司 | Loaded multifunctional protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205377298U (en) | High height above sea level suppresses humorous wave mode low pressure dynamic reactive power compensation device based on TSC | |
| CN203180510U (en) | Combined overvoltage protector of resistance capacitance lightening arrester | |
| CN209184242U (en) | It is a kind of to dispatch controllable power network neutral point earthing or grounding means | |
| CN2382128Y (en) | Breaker against electric leakage and fire | |
| CN2722487Y (en) | Arc and resonance extinction and overvoltage protector | |
| CN115940081A (en) | Overvoltage protection device based on combination of multi-characteristic nonlinear resistance cards | |
| CN201149988Y (en) | Overvoltage protector for cutting low-voltage electric network zero curve | |
| Jiang et al. | Research on fault current limiter based on fast switching technology | |
| CN201904601U (en) | Multifunctional three-phase circuit breaker | |
| CN209860601U (en) | Low-voltage reactive compensation fee control device | |
| CN202872329U (en) | Circuit breaker with overvoltage protection function | |
| CN111092409A (en) | Residual current operated circuit breaker with anti-interference and anti-misoperation protection functions | |
| CN2549635Y (en) | Multifunctional safety device of electrical apparatus | |
| CN207691414U (en) | A kind of high pressure protector | |
| CN201294378Y (en) | Switch arc-extinguishing and over-voltage protection | |
| CN201465687U (en) | Composite over-voltage protector and device thereof | |
| CN2549584Y (en) | Multifunctional security device of power supply for electrical appliance | |
| CN216530517U (en) | Multiple power protection system of hoist | |
| CN212588082U (en) | Power supply circuit applying overvoltage protector | |
| CN2657186Y (en) | Fire-proof circuit breaker for using electricity | |
| CN2471004Y (en) | Crowbar device of neutral point directly grounding system | |
| CN211183372U (en) | Residual current operated circuit breaker with anti-interference and anti-misoperation protection functions | |
| CN203312816U (en) | Shunt reactor compensation circuit for substation | |
| CN216794597U (en) | High-voltage power supply relay protection system of tower crane | |
| CN218335419U (en) | PT voltage secondary electric switching circuit |
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 |