CN2250587Y - Full automatic protective device for over voltage, under voltage, over current, delay and self protection - Google Patents
Full automatic protective device for over voltage, under voltage, over current, delay and self protection Download PDFInfo
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- CN2250587Y CN2250587Y CN 95221482 CN95221482U CN2250587Y CN 2250587 Y CN2250587 Y CN 2250587Y CN 95221482 CN95221482 CN 95221482 CN 95221482 U CN95221482 U CN 95221482U CN 2250587 Y CN2250587 Y CN 2250587Y
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- overvoltage
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Abstract
The utility model relates to a full automatic protective device for over voltage, under voltage, over current, delay and self protection. The device is composed of a sample circuit, an over voltage sample circuit, a Schmidt trigger circuit, a control delay circuit, a drive circuit, an under voltage sample circuit, a positive feedback trigger circuit and an over current protection circuit. The commercial power adopts the power supply mode of capacitor voltage reduction and voltage regulator diode voltage division, and takes the direct float of the network power supply to do sampling operation; the Schmidt trigger circuit is utilized to shape; the reliability and the stability of the trigger circuit are enhanced. An internal circuit adopts the operating mode of low current and integrated blocks of low power consumption and controls the attraction and release of the relay through a triode transistor. The self reliability and stability and the carrying capacity (can reach 4.4-6.8KW) of the protective device are enhanced, and simultaneously, the service voltage range is wide (170-400V); the safe operation of loads is ensured.
Description
The utility model relates to a kind of overvoltage, under-voltage, overcurrent, time-delay, self-insurance full-automatic protection device.
Common in the market protective device is varied, but most of protective device adopts transformer or capacitance decompression, because transformer coil is the enamelled wire coiling, at the high voltage (300V) that continues, transformer coil easily burns, and has limited the scope of application.And capacitance decompression is less because of the electric current that provides, and can not drive high power relay, and the power controlling of protective device is restricted.Adopt integrated package directly to drive the protective device of relay, cause the power consumption of integrated package to increase, the long-time use, integrated package causes the protective device unstable properties because of the heating circuit parameter changes.Chinese patent CN91225547:1 is described at overvoltage protection, and the utility model is to have designed a kind of overvoltage, under-voltage, overcurrent, time-delay, self-insurance full-automatic protection device on this basis.
The utility model purpose is, the overvoltage of design, under-voltage, overcurrent, time-delay, self-insurance full-automatic protection device are to adopt capacitance decompression, voltage stabilizing didoe DW
2, DW
3The dividing potential drop supply power mode; take the direct unsettled sampling of electric network source; utilize the Schmidt trigger circuit shaping; improve reliability, the stability of circuits for triggering; interior circuit adopts the working method of little electric current and adhesive and the release that the low-power consumption integrated package passes through the transistor control relay; improve reliability, stability and load capacity (can reach 4.4-6.8kw) the while working voltage wide ranges (170V-400V) of protective device self, guaranteed the safe operation of load.
Referring to accompanying drawing
Fig. 1 is the utility model circuit block diagram
Fig. 2 is the utility model circuit theory diagrams
The designed overvoltage of the utility model, under-voltage, overcurrent, time-delay, self-insurance are full-automatic Protective device, it be by reduction voltage circuit (1), holding circuit (2), rectification circuit (3), Sample circuit (4), overvoltage sample circuit (5), Schmidt trigger circuit (8), control are prolonged The time circuit (9), drive circuit (10), under-voltage sample circuit (6), Schmitt trigger (7), current foldback circuit (11) forms; At the civil power output current foldback circuit is set (11); Zener diode DW2、DW
3The series connection dividing potential drop is given respectively drive circuit (10), and overvoltage is got Sample circuit (5), under-voltage sample circuit (6), Schmidt trigger circuit (8), control time-delay Circuit (9) power supply; Pass through resistance R1、R
2, diode D6Obtain sampled voltage by civil power, And through overvoltage sample circuit (5) or under-voltage sample circuit (6), Schmitt trigger (7) And after utilizing Schmidt trigger circuit (8) that the sampling voltage waveform is carried out shaping, again through control Delay circuit processed (9), drive circuit (10) gauge tap; In the current foldback circuit (11) Current transformer B primary coil is serially connected in the civil power output, and secondary coil is through diode D10Connect the control utmost point of controllable silicon T, controllable silicon T is connected triode T6The C utmost point and triode T7B utmost point connecting line on, diode D11And meet current transformer B secondary coil and diode D10On the branch road that forms; Zener diode DW2、DW
3Series connection is attempted by capacitor C2Two ends; Drive Moving circuit (10), overvoltage sample circuit (5), under-voltage sample circuit (6), schmidt trigger The positive power source terminal of circuit (8), control delay circuit (9) is connected Zener diode DW2、DW
3Between on the tie point; Sample circuit (4) is by resistance R1、R
2, diode D6Directly get the civil power sampled voltage, through diode D5Rectification, capacitor C3Filtering connects respectively overvoltage sample circuit (5) triode T1The B utmost point and under-voltage sample circuit (6) triode T2B extremely go up; Through diode D7、
D
8The AND circuit that forms is connected with Schmidt trigger circuit (8), utilizes schmidt trigger Circuit (8) carries out shaping to the waveform of sampling voltage; Overvoltage sample circuit (5) is by resistance R3, triode T1, adjustable resistance W1Form, through triode T1After the amplification, again through diode D7Connect Schmidt trigger circuit (8); Under-voltage sample circuit (6) is by adjustable resistance W2, resistance R4、R
5, multiple tube T2、T
3Form, through multiple tube T2、T
3After the amplification, through diode D8Connect Schmidt trigger circuit (8); Resistance R in the Schmitt trigger (7)14And meet triode T in the under-voltage sample circuit (6)2The B utmost point and triode T3C extremely go up. Control Delay circuit processed (9) is by 555 integrated packages, resistance R9-R
10, capacitor C4、C
5Form, through diode D9Be connected with Schmidt trigger circuit (8); Drive circuit (10) adopts indirectly Drive, 555 integrated packages (3) end in the control delay circuit (9) is through resistance R12With triode T in the drive circuit (10)6The B utmost point connect.
Further describe and provide embodiment below in conjunction with accompanying drawing
The overvoltage of the utility model design, under-voltage, overcurrent, time-delay, self-insurance full-automatic protection device, its operation principle is that civil power one tunnel is through capacitor C
1Step-down, diode D
1-D
4Bridge rectifier, capacitor C
2Filtering obtains stable DC voltage, is relay J
1Power supply is provided, and this power supply is through voltage stabilizing didoe DW
2, DW
3Give overvoltage, under-voltage sample circuit after the dividing potential drop, Schmidt trigger circuit, Schmitt trigger, the control delay circuit, drive circuit provides power supply.Another road of civil power directly connects sample circuit, by resistance R
1, R
2, diode D
6Directly obtain the sampling alternating voltage, through diode D from civil power
5Rectification, capacitor C
3Filtered direct voltage is respectively through adjustable resistance W
1, W
2Input overvoltage sample circuit and under-voltage sample circuit.(8), (4) termination positive supply of control delay circuit 555 integrated packages, (1) connects negative supply, and (5) pass through capacitor C
5Be connected with negative supply;
When being in under-voltage condition (input voltage is lower than the alternating voltage 170V that presets), it is low level that the under-voltage sampling voltage in the utility model is lower than reference voltage, imports under-voltage sample circuit triode T
2The B utmost point, triode T
3C low level very, diode D
8Conducting, the output of Schmidt trigger circuit are low level, diode D
9Conducting, control delay circuit 555 integrated packages (2) end is input as low level, and (3) end is output as high level (indicator light LED
1Go out), through triode T
6Anti-phase back is low level (indicator light LED
2Bright), again through triode T
7Anti-phase back is a high level, relay J
1Outage, J
1-1Discharge J
1-2Adhesive, load is subjected to under-voltage protection.
When being in overvoltage condition (input voltage is higher than the alternating voltage 260V that presets), the overvoltage sampling voltage is higher than reference voltage, is high level, through triode T
1Anti-phase back is a low level, diode D
7Low level, diode D are imported, are output as in conducting, Schmidt trigger circuit
9Conducting, control delay circuit 555 integrated packages (2) end is input as low level, and (3) end is exported out and is high level (indicator light LED
1Go out), drive circuit is output as high level, relay J
1Outage, J
1-1Discharge J
1-2With voltage stabilizing didoe DW
1, capacitor C
1Connect, protective device enters the self-insurance state, and load is subjected to overvoltage protection.
When being in over-current state (load current is higher than the alternating current 20A that presets), the electric current that the current ratio preset current is big in the current transformer B primary coil at the voltage of secondary coil induction through diode D
10The control utmost point of input controllable silicon T after the rectification, controllable silicon T conducting, triode T in the drive circuit
6With controllable silicon T tie point be low level, through triode T
7Anti-phase is high level, relay J
1Outage, J
1-1Discharge J
1-2Adhesive, load is subjected to overcurrent protection.
When normal condition, (input voltage is for presetting alternating voltage 170-260V, output current less than presetting alternating current 20A), the reference voltage of sampling voltage for being provided with, the overvoltage sample circuit is input as low level, is output as high level, diode D
7End, under-voltage sample circuit is input as high level, is output as high level, diode D
8End; Diode AND gate circuit output high level, Schmidt trigger circuit is output as high level, diode D
9End; Hold through resistance R (6), (7) of control delay circuit 555 integrated packages
7, capacitor C
4The charging time-delay was a high level after 5 minutes, and 555 integrated packages inputs (2) end is high level, and output (3) end is low level, and drive circuit is output as low level, relay J
1Must be electric, J
1-1Adhesive, J
1-2Discharge, load normally moves.Load current is less than presetting alternating current, and controllable silicon T controls pole tension less than trigger voltage, not conducting of controllable silicon T, relay J
1Still electric, output has electric main output, load operate as normal.
For under-voltage, overvoltage, interchange sampling voltage, by regulating adjustable resistance W
2, W
1Preset, the resistance after will regulating at last inserts with fixed resistance, thereby has guaranteed the relative stability of guarantor's point.
Claims (9)
1, a kind of have overvoltage, under-voltage, overcurrent, time-delay, a self-insurance full-automatic protection device, it is characterized in that, it is by reduction voltage circuit (1), holding circuit (2), rectification circuit (3), sample circuit (4), overvoltage sample circuit (5), Schmidt trigger circuit (8), control delay circuit (9), drive circuit (10), under-voltage sample circuit (6), Schmitt trigger (7), current foldback circuit (11) is formed; At the civil power output current foldback circuit (11) is set; Voltage stabilizing didoe DW
2, DW
3The series connection dividing potential drop is given drive circuit (10) respectively, overvoltage sample circuit (5), under-voltage sample circuit (6), Schmidt trigger circuit (8), control delay circuit (9) power supply; Pass through resistance R
1, R
2, diode D
6Obtain sampled voltage by civil power, and through overvoltage sample circuit (5) or under-voltage sample circuit (6), Schmitt trigger (7) and after utilizing Schmidt trigger circuit (8) that the sampling voltage waveform is carried out shaping, again through control delay circuit (9), drive circuit (10) control switch.
2, overvoltage according to claim 1, under-voltage, overcurrent, time-delay self-insurance full-automatic protection device is characterized in that current transformer B primary coil is serially connected in the civil power output in the current foldback circuit (11), and secondary coil is through diode D
10Connect the control utmost point of controllable silicon T, controllable silicon T is connected triode T
6The C utmost point and triode T
7B utmost point connecting line on, diode D
11And meet current transformer B secondary coil and diode D
10On the branch road of forming.
3, overvoltage according to claim 1, under-voltage, overcurrent, time-delay self-insurance full-automatic protection device is characterized in that voltage stabilizing didoe DW
2, DW
3Series connection is attempted by capacitor C
2Two ends; The positive power source terminal of drive circuit (10), overvoltage sample circuit (5), under-voltage sample circuit (6), Schmidt trigger circuit (8), control delay circuit (9) is connected voltage stabilizing didoe DW
2, DW
3Between on the tie point.
4, overvoltage according to claim 1, under-voltage, overcurrent, time-delay self-insurance full-automatic protection device is characterized in that sample circuit (4) is by resistance R
1, R
2, diode D
6Directly get the civil power sampled voltage, through diode D
5Rectification, capacitor C
3Filtering connects overvoltage sample circuit (5) triode T respectively
1The B utmost point and under-voltage sample circuit (6) triode T
2B extremely go up; Through diode D
7, D
8The AND circuit of forming is connected with Schmidt trigger circuit (8), utilizes Schmidt trigger circuit (8) that the waveform of sampling voltage is carried out shaping.
5, overvoltage according to claim 1, under-voltage, overcurrent, time-delay self-insurance full-automatic protection device is characterized in that overvoltage sample circuit (5) is by resistance R
3, triode T
1, adjustable resistance W
1Form, through triode T
1After the amplification, again through diode D
7Connect Schmidt trigger circuit (8).
The full-automatic protection device of 6, overvoltage according to claim 1, under-voltage, overcurrent, time-delay self-insurance is characterized in that under-voltage sample circuit (6) is by adjustable resistance W
2, resistance R
4, R
5, multiple tube T
2, T
3Form, through multiple tube T
2, T
3After the amplification, through diode D
8Connect Schmidt trigger circuit (8).
7, overvoltage according to claim 1, under-voltage, overcurrent, time-delay self-insurance full-automatic protection device is characterized in that, resistance R in the Schmitt trigger (7)
14And meet triode T in the under-voltage sample circuit (6)
2The B utmost point and triode T
3C extremely go up.
8, overvoltage according to claim 1, under-voltage, overcurrent, time-delay self-insurance full-automatic protection device is characterized in that, the control delay circuit is by 555 integrated packages, resistance R
9-R
10Capacitor C
4, C
5Form, through diode D
9Be connected with Schmidt trigger circuit.
9, overvoltage according to claim 1, under-voltage, overcurrent, time-delay self-insurance full-automatic protection device is characterized in that, drive circuit (10) adopts indirectly and drives, and 555 integrated packages (3) end in the control delay circuit is through resistance R
12With triode T in the drive circuit (10)
6The B utmost point connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95221482 CN2250587Y (en) | 1995-09-07 | 1995-09-07 | Full automatic protective device for over voltage, under voltage, over current, delay and self protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95221482 CN2250587Y (en) | 1995-09-07 | 1995-09-07 | Full automatic protective device for over voltage, under voltage, over current, delay and self protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2250587Y true CN2250587Y (en) | 1997-03-26 |
Family
ID=33869085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95221482 Expired - Fee Related CN2250587Y (en) | 1995-09-07 | 1995-09-07 | Full automatic protective device for over voltage, under voltage, over current, delay and self protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2250587Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913272B (en) * | 2005-08-11 | 2010-05-26 | 艾默生网络能源系统有限公司 | Input undervoltage or overvoltage protection circuit |
| CN101859999A (en) * | 2009-04-09 | 2010-10-13 | 张兴华 | Power protection device of high-power electrical appliance |
| CN102035169A (en) * | 2009-09-28 | 2011-04-27 | 研祥智能科技股份有限公司 | Input overvoltage protection circuit and DC-DC power supply conversion device |
| CN101752827B (en) * | 2009-12-31 | 2013-06-19 | 海洋王照明科技股份有限公司 | Overvoltage, under-voltage and hysteresis protection circuit of input voltage |
| CN103401211A (en) * | 2013-08-13 | 2013-11-20 | 黄宇嵩 | Direct-current load overvoltage overcurrent protection device |
| CN103548264A (en) * | 2011-01-27 | 2014-01-29 | 高通股份有限公司 | High voltage tolerant receiver |
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
| CN112688275A (en) * | 2020-12-11 | 2021-04-20 | 漳州科华技术有限责任公司 | Inverter protection method and device and terminal equipment |
| CN113589720A (en) * | 2021-07-19 | 2021-11-02 | 宁波迦南智能电气股份有限公司 | Power circuit working method applicable to communication module in electric energy meter |
-
1995
- 1995-09-07 CN CN 95221482 patent/CN2250587Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1913272B (en) * | 2005-08-11 | 2010-05-26 | 艾默生网络能源系统有限公司 | Input undervoltage or overvoltage protection circuit |
| CN101859999A (en) * | 2009-04-09 | 2010-10-13 | 张兴华 | Power protection device of high-power electrical appliance |
| CN102035169B (en) * | 2009-09-28 | 2015-05-20 | 研祥智能科技股份有限公司 | Input overvoltage protection circuit and DC-DC power supply conversion device |
| CN102035169A (en) * | 2009-09-28 | 2011-04-27 | 研祥智能科技股份有限公司 | Input overvoltage protection circuit and DC-DC power supply conversion device |
| CN101752827B (en) * | 2009-12-31 | 2013-06-19 | 海洋王照明科技股份有限公司 | Overvoltage, under-voltage and hysteresis protection circuit of input voltage |
| CN103548264A (en) * | 2011-01-27 | 2014-01-29 | 高通股份有限公司 | High voltage tolerant receiver |
| CN103548264B (en) * | 2011-01-27 | 2016-10-26 | 高通股份有限公司 | High voltage tolerant receiver |
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
| US11404867B2 (en) | 2012-12-03 | 2022-08-02 | Huawei Techologies Co., Ltd. | Overvoltage protection apparatus and method |
| CN103401211A (en) * | 2013-08-13 | 2013-11-20 | 黄宇嵩 | Direct-current load overvoltage overcurrent protection device |
| CN112688275A (en) * | 2020-12-11 | 2021-04-20 | 漳州科华技术有限责任公司 | Inverter protection method and device and terminal equipment |
| CN112688275B (en) * | 2020-12-11 | 2024-03-19 | 厦门科华数能科技有限公司 | Inverter protection method and device and terminal equipment |
| CN113589720A (en) * | 2021-07-19 | 2021-11-02 | 宁波迦南智能电气股份有限公司 | Power circuit working method applicable to communication module in electric energy meter |
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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 |