CN2306514Y - Overload auto-control ammeter - Google Patents
Overload auto-control ammeter Download PDFInfo
- Publication number
- CN2306514Y CN2306514Y CN 97226738 CN97226738U CN2306514Y CN 2306514 Y CN2306514 Y CN 2306514Y CN 97226738 CN97226738 CN 97226738 CN 97226738 U CN97226738 U CN 97226738U CN 2306514 Y CN2306514 Y CN 2306514Y
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- CN
- China
- Prior art keywords
- negative pole
- connect
- resistance
- relay
- light emitting
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- Expired - Fee Related
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Abstract
The utility model discloses an overload autocontrol ammeter, which is characterized in that a power supply of 220 v is changed into a dc voltage of 12 v through the voltage transformation rectified output, and an ammeter control working power supply is formed. The dc power supply supplied to a time delay circuit and an over current circuit. The time delay circuit is composed of a primary element of CI integrated package NE555N. The over current circuit is composed of a deconcentrator, a potentiometer, a signal transformer, a commutation diode, a resistor, an electrolytic capacitor, etc. The function of the overload autocontrol ammeter can be achieved. The utility model has the advantages of small size, light weight, low cost, high sensitivity, economy, practicality, high utilization ratio of equipment, and long service life of the equipment.
Description
The utility model relates to electric current Displaying Meter technical field, the automatic Control current table of particularly a kind of overload.
At present, the reometer that sell the home market, the single function instrument of planting that only has the electric current indication, this single function reometer, for the motor of load and the fault of plant equipment appearance, can not play the effect of automatic control motor or mechanical parking, impel the opereating specification several times of current value overshoot, equipment is still forced running, and this situation will cause the bigger economic loss of plant equipment.Existing protective device as electrothermal relay, fuse-link, fuse etc., exists that sensitivity is low, accident rate is high, cause motor individual event electric operation sometimes, does not guarantee the safe operation of motor.
The purpose of this utility model provides the automatic Control current table of a kind of overload.
The technical solution of the utility model is finished like this.
The automatic Control current table of a kind of overload, it is made up of housing, gauge outfit, control panel, adjustment knob, binding post, circuit board, line, it is characterized in that: delay circuit is to connect power transformer B by the 220V power supply
2Once hold, secondary is exported through D
13-16Diode bridge rectifier circuit, output dc voltage 12V form reometer Control work power supply, and the positive pole of direct supply connects deconcentrator K
1, connect electrolytic condenser C simultaneously
2Positive pole, 4,5 pin of CI integrated package NE555N, electrolytic condenser C
3Anodal, relay SJ
1Normally opened contact, electrolytic condenser C
2Negative pole be connected with dc power cathode, 2 pin of CI integrated package NE555N connect potentiometer W
2, 7 pin of CI integrated package NE555N, electrolytic condenser C
31 pin of negative pole, CI integrated package NE555N connect the negative pole of direct supply, 3 pin of CI integrated package NW555N connect light emitting diode D
12Anodal, relay SJ
1Coil one end, light emitting diode D
12Negative pole connect resistance R
3One end, resistance R
3The other end connect negative pole, the relay SJ of direct supply
1One end of coil, adjustable potentiometer W
2Adjustable end and another stiff end connect power cathode; The circuit of narrating above constitutes timing relay, principle is an energized, by power transformer output secondary AC voltage, becomes the 12V dc output power through bridge rectifier, the negative pole of 1 pin energized of CI integrated package, CI integrated package 4,5 pin, electrolytic condenser C
3Discharge potentiometer W to CI integrated package 7,2 pin by maximal value
2Adjust discharge time, when place value reached setting value, the output of CI integrated package 3 pin drove relay SJ
1Work is supplied with direct supply to crossing current circuit;
The negative pole of crossing current circuit and being by direct supply connects signal transformer B
1, the adjustable end of secondary output winding end and adjustable potentiometer, current transformer PT secondary coil and signal transformer B
1Primary winding connects, and the negative pole of direct supply also connects light emitting diode D
3-10An end, the other end of light emitting diode connects deconcentrator K
1Breakout, potentiometer W
1The other end connect signal transformer B
1The other end, the commutation diode D of output terminal
1Positive pole, commutation diode D
1Negative pole connect resistance R
1An end, resistance R
1The other end connect R
2, electrolytic condenser C
1Positive terminal, resistance R
2The other end connect composite amplifier BG
1, BG
2Input end, the output terminal of composite amplifier connects sustained diode
2Anodal, relay J
1Coil, resistance R
4, resistance R
4The other end connect light emitting diode D
11Negative pole, sustained diode
2Negative pole end, relay J
1Coil one end, light emitting diode D
11Positive terminal connect relay SJ
1Normally opened contact, composite amplifier BG
1, BG
2Emitter, electrolytic condenser C
1Negative pole be connected the negative pole of direct supply; The principle of work of crossing current circuit is, when the Current Transformer Secondary induction current, and signal transformer B
1Primary winding has electric current to pass through, signal transformer B
1Secondary coil induction secondary AC signal, by constant potential device W
1The zeroing sampling when electric current surpasses steady state value, just has output signal through D
1Half-wave rectification is by current-limiting resistance R
1To electrolytic capacitor filter device C
1Charging, discharge form sawtooth signal, again by current-limiting resistance R
2To BG
1Base input signal, BG when the constant current signal value is zero
1, BG
2Be cut-off state, BG when surpassing steady state value
1, BG
2Conducting work, relay J
1Adhesive is often opened by normally closed change.By the automatic Control current table of overload that above-mentioned two groups of circuit are formed, realized the effect that automatic control motor or plant equipment break down.
Characteristics of the present utility model are, adopting time-delay, crossing current circuit is one, and delay circuit can be delayed time the motor start-up high peak currents, when motor ran well, time-delay reached setting valve, time relay adhesive, provide direct supply through rectification circuit, cross current circuit and enter normal operating conditions.Reometer is set the load steady current by adjusting knob and is surpassed 30-40%, and any accident causes the overload of current loading, can both play the purpose that protection is monitored by auto stop.This utility model has that volume is little, in light weight, cost is low, highly sensitive, economical and practical, improve usage ratio of equipment, prolong the serviceable life of equipment.
Fig. 1 is the automatic Control current watch circuit figure of overload.
Fig. 2 is the automatic Control current table stereographic map of overload.
Fig. 3 is the automatic Control current table rear view of overload.
Embodiment
Enforcement of the present utility model is to implement (seeing Fig. 2,3) like this.Transship automatic Control current table, it is by housing 2, gauge outfit 1, control panel 4, adjusts knob 6, binding post 5, circuit board 3, line assembling and constitute the instrument casing, and the delay circuit (see figure 1) of circuit board is to connect power transformer B by the 220V power supply
2Once hold, secondary is exported through D
13-16Diode bridge rectifier circuit, output dc voltage 12V form reometer Control work power supply, and the positive pole of direct supply connects deconcentrator K
1, connect electrolytic condenser C simultaneously
24,5 pin, the electrolytic condenser C of positive pole, CI integrated package NE 555N
3Anodal, relay SJ
1Normally opened contact, electrolytic condenser C
2Negative pole be connected with dc power cathode, 2 pin of CI integrated package NE555N connect potentiometer W
2, 7 pin of CI integrated package NE555N, electrolytic condenser C
31 pin of negative pole, CI integrated package NE555N connect the negative pole of direct supply, 3 pin of CI integrated package NW555N connect light emitting diode D
12Anodal, relay SJ
1Coil one end, light emitting diode D
12Negative pole connect resistance R
3One end, resistance R
3The other end connect negative pole, the relay SJ of direct supply
1One end of coil, adjustable potentiometer W
2Adjustable end and another stiff end connect power cathode; The circuit of narrating above constitutes timing relay, principle is an energized, by power transformer output secondary AC voltage, becomes the 12V dc output power through bridge rectifier, the negative pole of 1 pin energized of CI integrated package, CI integrated package 4,5 pin, electrolytic condenser C
3Discharge potentiometer W to CI integrated package 7,2 pin by maximal value
2Adjust discharge time, when place value reached setting value, the output of CI integrated package 3 pin drove relay SJ
1Work is supplied with direct supply to crossing current circuit;
The negative pole of crossing current circuit and being by direct supply connects signal transformer B
1(see figure 1), the adjustable end of secondary output winding end and adjustable potentiometer, current transformer PT secondary coil and signal transformer B
1Primary winding connects, and the negative pole of direct supply also connects light emitting diode D
3-10An end, the other end of light emitting diode connects deconcentrator K
1Breakout, potentiometer W
1The other end connect signal transformer B
1The other end, the commutation diode D of output terminal
1Positive pole, commutation diode D
1Negative pole connect resistance R
1An end, resistance R
1The other end connect R
2, electrolytic condenser C
1Positive terminal, resistance R
2The other end connect composite amplifier BG
1, BG
2Input end, the output terminal of composite amplifier connects sustained diode
2Anodal, relay J
1Coil, resistance R
4, resistance R
4The other end connect light emitting diode D
11Negative pole, sustained diode
2Negative pole end, relay J
1Coil one end, light emitting diode D
11Positive terminal connect relay SJ
1Normally opened contact, composite amplifier BG
1, BG
2Emitter, electrolytic condenser C
1Negative pole be connected the negative pole of direct supply.The principle of work of crossing current circuit is, when the Current Transformer Secondary induction current, and signal transformer B
1Primary winding has electric current to pass through, signal transformer B
1Secondary coil induction secondary AC signal, by constant potential device W
1The zeroing sampling when electric current surpasses steady state value, just has output signal through D
1Half-wave rectification is by current-limiting resistance R
1To electrolytic capacitor filter device C
1Charging, discharge form sawtooth signal, again by current-limiting resistance R
2To BG
1Base input signal, BG when the constant current signal value is zero
1, BG
2Be cut-off state, BG when surpassing steady state value
1, BG
2Conducting work, relay J
1Adhesive is often opened by normally closed change.By the automatic Control current table of overload that above-mentioned two groups of circuit are formed, realized that automatic control motor or plant equipment break down and self-stopping effect.
Claims (1)
1. automatic Control current table of overload, it is made up of housing, gauge outfit, control panel, adjustment knob, binding post, circuit board, line, it is characterized in that: delay circuit is by 220V power supply connection power transformer B
2Once hold, secondary is exported through D
13-16Diode bridge rectifier circuit, output dc voltage 12V form reometer Control work power supply, and the positive pole of direct supply connects deconcentrator K
1, connect electrolytic condenser C simultaneously
2Positive pole, 4,5 pin of CI integrated package NE555N, electrolytic condenser C
3Anodal, relay SJ
1Normally opened contact, electrolytic condenser C
2Negative pole be connected with dc power cathode, 2 pin of CI integrated package NE555N connect potentiometer W
2, 7 pin of CI integrated package NE555N, electrolytic condenser C
31 pin of negative pole, CI integrated package NE555N connect the negative pole of direct supply, 3 pin of CI integrated package NW555N connect light emitting diode D
12Anodal, relay SJ
1Coil one end, light emitting diode D
12Negative pole connect resistance R
3One end, resistance R
3The other end connect negative pole, the relay SJ of direct supply
1One end of coil, adjustable potentiometer W
2Adjustable end and another stiff end connect power cathode; The negative pole of crossing current circuit and being by direct supply connects signal transformer B
1, the adjustable end of secondary output winding end and adjustable potentiometer, current transformer PT secondary coil and signal transformer B
1Primary winding connects, and the negative pole of direct supply also connects light emitting diode D
3-10An end, the other end of light emitting diode connects deconcentrator K
1Breakout, potentiometer W
1The other end connect signal transformer B
1The other end, the commutation diode D of output terminal
1Positive pole, commutation diode D
1Negative pole connect resistance R
1An end, resistance R
1The other end connect R
2, electrolytic condenser C
1Positive terminal, resistance R
2The other end connect composite amplifier BG
1, BG
2Input end, the output terminal of composite amplifier connects sustained diode
2Anodal, relay J
1Coil, resistance R
4, resistance R
4The other end connect light emitting diode D
11Negative pole, sustained diode
2Negative pole end, relay J
1Coil one end, light emitting diode D
11Positive terminal connect relay SJ
1Normally opened contact, composite amplifier BG
1, BG
2Emitter, electrolytic condenser C
1Negative pole be connected the negative pole of direct supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97226738 CN2306514Y (en) | 1997-09-19 | 1997-09-19 | Overload auto-control ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97226738 CN2306514Y (en) | 1997-09-19 | 1997-09-19 | Overload auto-control ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2306514Y true CN2306514Y (en) | 1999-02-03 |
Family
ID=33940368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97226738 Expired - Fee Related CN2306514Y (en) | 1997-09-19 | 1997-09-19 | Overload auto-control ammeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2306514Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499734A (en) * | 2008-10-24 | 2009-08-05 | 王国强 | Application of rectifying conversion module in AC current meter |
| CN102854378A (en) * | 2011-06-30 | 2013-01-02 | 海洋王照明科技股份有限公司 | Current testing circuit |
-
1997
- 1997-09-19 CN CN 97226738 patent/CN2306514Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499734A (en) * | 2008-10-24 | 2009-08-05 | 王国强 | Application of rectifying conversion module in AC current meter |
| CN102854378A (en) * | 2011-06-30 | 2013-01-02 | 海洋王照明科技股份有限公司 | Current testing circuit |
| CN102854378B (en) * | 2011-06-30 | 2015-01-28 | 海洋王照明科技股份有限公司 | Current testing circuit |
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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 |