CN202018930U - Multifunctional three-phase digital display circuit breaker - Google Patents
Multifunctional three-phase digital display circuit breaker Download PDFInfo
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- CN202018930U CN202018930U CN2011200637488U CN201120063748U CN202018930U CN 202018930 U CN202018930 U CN 202018930U CN 2011200637488 U CN2011200637488 U CN 2011200637488U CN 201120063748 U CN201120063748 U CN 201120063748U CN 202018930 U CN202018930 U CN 202018930U
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- digital display
- current
- circuit breaker
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Abstract
The utility model discloses a multifunctional three-phase digital display circuit breaker, which comprises a current transformer (1), an alternating current contactor (2), a knob switch (4), a programmable three-phase digital display current combination meter (5) and an over-voltage protector (7). The multifunctional three-phase digital display circuit breaker is characterized in that: the current transformer (1) comprises three transformers LA, LB and LC, which are respectively connected with all phases of power supplies in a distribution line; all phases of current signals in the distribution line are input into 15 to 20 pins in the three-phase digital display current combination meter (5); the real-time measurement and display of a three-phase current numerical value are carried out; an output end of the three-phase digital display current combination meter (5) is connected with a relay (9) and the over-voltage protector (7) respectively; and one end of a control coil of the alternating current contactor (2) is connected to the B-phase power supply of the distribution line, and the other end of the control coil of the alternating current contactor (2) is connected to the C-phase power supply of the distribution line by a contact point of the relay (9). The multifunctional three-phase digital display circuit breaker has more comprehensive electrical safety protection capacity, is convenient and safe in operation process, and is an upgraded product of the conventional air circuit breaker.
Description
Technical field
The utility model relates to a kind of circuit breaker, relates in particular to a kind of three-phase digital display circuit breaker.
Background technology
Three-phase air circuit that uses in the existing distribution line such as DZ type etc., in use can only play control three phase mains switching and the protective effect during with the electric loading overcurrent, defencive function is single, and, use after a period of time the inner irony device clamping stagnation that easily gets rusty because of it is configured to mechanical type; The influence reliability of electric loading overcurrent protection.Inefficacy because of defencive function when serious causes supply line impaired, and the electrical fire of bringing out risk is arranged.So necessary existing three-phase air circuit commonly used is improved, it is better to reach the Electrical Safety barrier propterty, further improves aim of safe power utilization.
Summary of the invention
The purpose of this utility model is to provide a kind of three-phase multifunctional digital display circuit breaker, this three-phase digital display circuit breaker is to have solved the problem of DZ type three-phase air circuit function singleness commonly used now, reliable, accurate and easy to operate, safe characteristics when having the Electrical Safety protection.
The utility model is achieved like this: it comprises current transformer, A.C. contactor, rotary switch, and three-phase digital display currents combination table able to programme, power transformer, overvoltage protector are formed.Current transformer comprises that three instrument transformers of LA, LB. Lc connect each phase power supply in the distribution line respectively, and each phase current signal in the distribution line and be input to 15～20 pin in the three digital display currents combination tables, carry out the real-time measurement and the demonstration of three-phase current numerical value, and with three digital display currents combination tables in the three-phase output current set and spacingly to compare and to control.The output of three digital display currents combination tables is connected with overvoltage protector with relay respectively.The control coil one of A.C. contactor terminates on the distribution line B phase power supply; The other end is connected on the distribution line C phase power supply by the contact of relay, and three pairs of master control contacts of A.C. contactor are serially connected between distribution line and load, play the switching effect of control load power supply.Rotary switch is located between three digital display currents combination tables and overvoltage protection device and the power supply, and the switching of control load power supply.
The utility model beneficial effect is: but the digitlization of the utility model three-phase multifunctional digital display circuit breaker shows the power consumption electric current (precision 1.0%Fs) of every phase load in the three phase mains in real time; The utility model is convenient to understand current value in the circuit, and multiplexing electric abnormality can in time be found and keep in repair as early as possible, and can be according to the difference of each electricity consumption load request, in exchanging 0. 1A～600A scope.Set every phase load operating current output limit value (each alternate limits value can be set to inequality) respectively by the utility model digital display circuit breaker; Have single-phase during work in the circuit or multiphase current value when surpassing set current limit, can disconnect the three phase supply power supply in 1 second.To carrying out reliable protection, and can show the outage reason with corresponding alarm lamp with electric loading and supply line.Overvoltage protector 7 detects phase voltage in the distribution line.When magnitude of voltage in the distribution line surpasses on the set point in limited time, cut off three phase mains output in the second rapidly, and with corresponding alarm lamp, show the reason of cutting off the power supply.The utility model is compared with existing three-phase air circuit: 7 utility functions such as newly-increased open-phase protection, have more fully Electrical Safety protective capacities, and operating process is convenient, safety is the upgrading products of existing air circuit.
Description of drawings:
Figure l is the utility model three-phase digital display circuit breaker schematic appearance;
Fig. 2 is the utility model three-phase digital display circuit breaker schematic diagram.
Current transformer LA, LB. Lc in the drawings 1; 2, A.C. contactor; 3, use electric loading M; 4, rotary switch; 5, three digital display currents combination tables able to programme; 6, power transformer; 7, overvoltage protector; 8 temperature indicators.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated.As shown in Figure 1, 2.It comprises current transformer 1, A.C. contactor 2,, SB rotary switch 4, three-phase digital display currents combination table 5 able to programme, model AOB1942, power transformer 6, input/output voltage ratio=220V/18V, overvoltage protector 7 are formed.Current transformer l (LA, LB. Lc) responds in the distribution line each phase current signal respectively and is input to that 15～20 pin carry out the real-time measurement and the demonstration of three-phase current numerical value in the three digital display currents combination tables 5, and with three digital display currents combination tables 5 in the three-phase output current set and spacingly compare and control.The control coil input voltage of A.C. contactor 2 is for exchanging 380V, and A.C. contactor 2 one terminates on the distribution line B phase power supply; The other end is connected on the distribution line C phase power supply by the contact of relay 9, and the relay model is JQX-13F; Three pairs of master control contacts of A.C. contactor 2 are serially connected between distribution line and load, play the switching effect of control load 3 power supplys.SB rotary switch 4 is located between three digital display currents combination tables and overvoltage protection device 7 and the power supply, and the switching of control load 3 power supplys.
Above-mentioned current transformer LA, LB, Lc respond to three-phase current in the electric line respectively and can be input in the ratio of 600A/5A in the three digital display currents combination tables 5 able to programme, carry out the real-time measurement and the demonstration of every phase current; Simultaneously with three digital display currents combination tables 5 in every phase current set limit value and compare in real time.Current value is prescribed a time limit greater than setting limit value lower limit or less than setting on the limit value in using electric line, 4,5 output closures on the three digital display currents combination tables, and the three phase supply power supply is normally exported.Otherwise; when having one to reach above phase current values mutually in the input three phase mains above setting limit value upper and lower limit; 4,5 outputs disconnect rapidly on the combination table, relay 9 dead electricity cause the contactor coil dead electricity; main contact KM disconnects electricity consumption load power source and self-locking and reports to the police with dependent failure phase indicator light, plays the super limit value protective effect of setting.
When input power supply A phase voltage was lower than 220xl. 2=264V, the G point current potential in the overvoltage protector 7 was higher than F point current potential, the 6. pin output high level of operational amplifier LM741; triode BG. saturation conduction; the relay J closing of contact, main noddle on contactor KM adhesive can get with electric loading.Otherwise when the A phase voltage was higher than 264V, the G point current potential in the overvoltage protector was lower than F point current potential; the 6. pin output low level of operational amplifier LM741, triode BGI ends, and relay J disconnects; the contactor coil dead electricity is cut off the electricity consumption load power source, plays the overvoltage protection effect.
The utility model three-phase digital display circuit breaker also can be realized following function:
The open-phase protection function:
As shown in Figure 2, when scarce A phase power supply, overvoltage protector repeat circuit J dead electricity, its upper contact cuts off contactor 2 coil powers, and probe of contactor disconnects, and cuts off the power supply to load.When lacking B or C phase power supply, contactor 2 coil losing electricities have reached equally to the effect with the electric loading outage equally.To the power consumption equipment or the load of must three phase mains in the course of work powering simultaneously, can play the open-phase protection effect as threephase asynchronous etc.
With the line fault deixis of reporting to the police:
Because of three digital display currents combination tables able to programme have on every phase current, F limits warning function; corresponding overpressure protection indicator light is arranged on the overvoltage protector; in the course of the work; cut off the electricity supply as the digital display circuit breaker; all can light corresponding indicator light and report to the police, learn be certain phase power supply occur what class fault (as overcurrent, undercurrent; overvoltage) causes, search when being convenient to keep in repair and get rid of the using electricity system fault.
The utility model is easy to operate, as shown in Figure 1: the power supply of rotary switch SB Control current combination table and overvoltage protector, its upper contact control contactor coil power.Like this, turn rotary switch SB can play the effect that the far distance controlled load power source is switched on or switched off;
For example: former D2-400A type three-phase air circuit, operation strength needs about 8kg during connection, and operation strength only needs about 50g during existing three-phase digital display closing of power circuit breaker, has reached light operation purpose.
Measurement data can be sent to computer by standard RS-485 communication interface, and circuit breaker be carried out remote control operation by computer.
The utility model uses object lesson as follows: we power at three phase mains, delta connection; Use three-phase digital display circuit breaker on 75 kilowatts of large scale industry resistance furnaces of input power.
Because: P power 2 √ 3/kSU=75000 1.732x/w * 380=75000 calculates and learns: as=114A.Consider discreteness with electric loading, during use with three-phase digital display circuit breaker current output limit value upper limit H,, H2 H3 is separately positioned on 130A, considers that simultaneously there is certain interference signal in the large scale industry electric furnace, currents combination table input filter factor can be arranged between 2-4; The rated current duty 200A of solid-state relay SSRi, SSR2, SSR3 is the switching of may command three-phase digital display circuit breaker by rotary switch SB at this moment.When operate as normal, can show the current value of threephase load on the three-phase digital display circuit breaker in real time, whether be convenient to understand the electric furnace operating current normal.Break down as consumable accessory B phase electric furnace heating wire in the work.As: B shows that mutually current value surpasses setting limit value 130A on Leaked Current of Line to Ground or the partial short-circuit combination table; the digital display circuit breaker cuts off three phase mains output and self-locking rapidly; lighting B phase upper limit indicator light reports to the police; because the rated current 200A of solid-state relay is greater than the setting electric current 130A of circuit breaker; so can avoid solid-state relay to cause damage because of load faulty; should the A phase voltage surpass when exchanging 264V together; overvoltage protector action in the three-phase breaker at this moment; cut-out three phase mains output reaches the purpose of avoiding solid-state relay and damaging because of input voltage is too high with electric loading etc. equally.
This multi-functional three-phase digital display circuit breaker has the following advantages: 1, overcurrent protection reliability, accuracy height; 2, the output current limit value can be set adjusting on demand; 3, contain distribution line open-phase protection function; 4, distribution line over-voltage protecting function; 5, distribution line low-voltage variation function; 6, the real-time Presentation Function of each phase load electric current; 7, warning deixis; 8, can realize the far distance controlled function by rotary switch SB; Reach the Electrical Safety protection, easy to operate effect.
Claims (1)
1. a multi-functional three-phase numeral shows circuit breaker, it comprises current transformer (1), A.C. contactor (2), rotary switch (4), three-phase digital display currents combination table able to programme (5), overvoltage protector (7) is formed, it is characterized in that: current transformer (l) comprises LA, LB. three instrument transformers of Lc connect each phase power supply in the distribution line respectively, and each phase current signal in the distribution line and be input to 15～20 pin in the three digital display currents combination tables (5), carry out the real-time measurement and the demonstration of three-phase current numerical value, the output of three digital display currents combination tables (5) is connected with overvoltage protector (7) with relay (9) respectively, and the control coil one of A.C. contactor (2) terminates on the distribution line B phase power supply; The other end is connected on the distribution line C phase power supply by the contact of relay (9), and rotary switch (4) is located between three digital display currents combination tables (5) and overvoltage protection device (7) and the power supply, and the switching of control load (3) power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200637488U CN202018930U (en) | 2011-03-13 | 2011-03-13 | Multifunctional three-phase digital display circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200637488U CN202018930U (en) | 2011-03-13 | 2011-03-13 | Multifunctional three-phase digital display circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN202018930U true CN202018930U (en) | 2011-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200637488U Expired - Fee Related CN202018930U (en) | 2011-03-13 | 2011-03-13 | Multifunctional three-phase digital display circuit breaker |
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| CN (1) | CN202018930U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037729A (en) * | 2014-06-17 | 2014-09-10 | 李忠文 | Multi-channel digital-display temperature control circuit breaker |
-
2011
- 2011-03-13 CN CN2011200637488U patent/CN202018930U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037729A (en) * | 2014-06-17 | 2014-09-10 | 李忠文 | Multi-channel digital-display temperature control circuit breaker |
| CN104037729B (en) * | 2014-06-17 | 2017-04-19 | 李忠文 | Multi-channel digital-display temperature control circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: REN JINHAI Free format text: FORMER OWNER: LI ZHONGWEN Effective date: 20140805 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 330002 NANCHANG, JIANGXI PROVINCE TO: 330000 NANCHANG, JIANGXI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140805 Address after: 330000 Jiangxi Province, south of the city of Nanchang Lu Kang Ze yuan 3 Building 1 unit 602 room Patentee after: Ren Jinhai Address before: 330002 Jiangxi province Qingyunpu District of Nanchang city six District 10 Hongdu Building 2 Unit No. 201 Patentee before: Li Zhongwen |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111026 Termination date: 20150313 |
|
| EXPY | Termination of patent right or utility model |