CN2586276Y - Low-voltage protector of electronic a.c 220V switching gear - Google Patents
Low-voltage protector of electronic a.c 220V switching gear Download PDFInfo
- Publication number
- CN2586276Y CN2586276Y CN 02259052 CN02259052U CN2586276Y CN 2586276 Y CN2586276 Y CN 2586276Y CN 02259052 CN02259052 CN 02259052 CN 02259052 U CN02259052 U CN 02259052U CN 2586276 Y CN2586276 Y CN 2586276Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- utility
- output
- alternating current
- 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 relates to an under voltage protector for electronic type alternating current switching mechanisms of 220V, which is composed of a voltage transformation circuit, a tank circuit, a divider circuit, a voltage detecting circuit, a pulse shaping circuit, a drive circuit, a power switch circuit and a three-terminal voltage stabilizing circuit. The under voltage protector is mainly used in alternating current switching mechanisms of 220V in conveying substation cabinets. The utility model overcomes the problems of the existing electromagnetic mechanism under voltage protector and has the characteristics of simple assemblage, convenient debugging, stable voltage protection points, small size, etc. Therefore, the utility model reduces the maintenance cost of the equipment and enhances production efficiency.
Description
Technical field
The utility model belongs to the power technology field, exactly is to the under-voltage protection device on the switching mechanism that send the alternating current 220V that uses in transformer station's rack.
Background technology
Send the under-voltage protection device on the switching mechanism of the alternating current 220V that uses in transformer station's rack at present; it all is mechanical electromagnetic type; (line voltage is at 140V-250V) solenoid adhesive when being normal voltage; make mechanism be in the "on" position normal power supply; when voltage drops to can not keep the time; solenoid discharges, and makes mechanism's off line separating brake, both under-voltage protection outages.Technical staff's reflection according to Machinery Plant; the value of quite a few mechanism's off line under voltage is difficult to harmonize; both made and mixed up; it is also unstable behind the making alive that (general normal power supply voltage is 140V-250V, when being lower than below the 140V, just needs power-off protection; both under-voltage protections); sometimes voltage is reduced to below the 140V also not off line separating brake, is less than the phenomenon that too early off line separating brake just appears in protection voltage (voltage is greater than 140V) sometimes, and is therefore in use very unstable.On the other hand, in process of production, the under-voltage protection that the workman debugs a switching mechanism need spend time of one day and could debug one, causes production efficiency low, and labour cost rises.
Summary of the invention
The purpose of this utility model is in order to overcome problems of the prior art, and a kind of electronic type alternating current 220V switching mechanism under-voltage protection device is provided, and replaces present mechanical electromagnetic type under-voltage protection device.Make it easy for installation and need not adjust, the protection electrical voltage point is stable.
This purpose realizes with following technical proposal: electronic type alternating current 220V switching mechanism under-voltage protection device, and be by voltage conversion circuit, 1., 2. be connected with accumulator respectively at two dc output end, the three-terminal voltage-stabilizing circuit provides operating voltage to it; Wherein 1. output also is connected to bleeder circuit, and 2. output also is connected to drive circuit, and provides operating voltage to it; A bleeder circuit and a voltage detecting circuit join, and connect a pulse shaper in the output of testing circuit, and pulse shaper is connected with power switch circuit by drive circuit; The three-terminal voltage-stabilizing circuit is connected with voltage detecting circuit, pulse shaper respectively, and provides operating voltage to it; The output and the power switch circuit of described accumulator join, and the other end of power switch circuit is connected on claimed user's the switching mechanism tripping coil L.
The utlity model has that volume is little, power consumption is low (during standby≤1W), dependable performance, installation simply need not adjust; accurately (as alternating current 220V under-voltage protection device protection magnitude of voltage is 130V ± 3V to the protection point; the user also can regulate the protection point voltage as requested voluntarily), advantage such as need not safeguard.
Description of drawings
Fig. 1 is the utility model integrated circuit structured flowchart.
Fig. 2 is a circuit working schematic diagram of the present utility model.
Embodiment
In conjunction with the accompanying drawings whole formation of the present utility model and operation principle thereof are described in further detail:
As shown in Figure 1, 2: electronic type alternating current 220V switching mechanism includes voltage conversion circuit 1 with the under-voltage protection device, 1. is connected with accumulator 2, bleeder circuit 4 at its dc output end, provides direct-current working volts to the two.Be connected with voltage detecting circuit 5 on bleeder circuit, the output of voltage detecting circuit is connected with pulse shaper 6, pulse shaper is connected with power switch circuit 8 by drive circuit 7.Wherein accumulator 2 also joins with power switch circuit.2. dc output end at voltage conversion circuit 1 is connected with three-terminal voltage-stabilizing power supply 3, drive circuit 7 respectively, and provides direct-current working volts to the two.This stabilized voltage power supply is connected with voltage detecting circuit, pulse shaper respectively, and operating voltage is provided.Be connected with claimed extraneous switching mechanism by power switch circuit 8 at last.(see figure 2) wherein voltage conversion circuit 1 is to be made of transformer TR, bridge rectifier B1, B2 and capacitor C1, C2 filter circuit.Accumulator 2 is to be made of resistance R 5, diode D1 filter circuit and big capacity energy storage capacitor C8.Three-terminal voltage-stabilizing circuit 3 is to be made of IC1 chip (model is LM7806) and filtering capacitor C3.Bleeder circuit 4 is to be made of resistance R 1, R2, R3, R4 and potentiometer RW.Voltage detecting circuit 5 is resistance R 7, R8, R9, R10 by judging circuit chip IC 2 (model is LM293), peripheral circuit mainly, and resistance R 6 is formed with capacitor filtering circuit and voltage-regulation potentiometer RW.Pulse shaper 6 is capacitor C6, C7 by impulse circuit chip IC 3 (model is NE555), signal controlling triode T1 and peripheral circuit thereof mainly, and the filter circuit that resistance R 11, R12 and capacitor C5 constitute is formed.Drive circuit 7 is by power amplification triode T2, and diode D3 protective circuit and resistance R 13, R14 constitute.Power switch circuit 8 is made of relay J and diode D2 protective circuit thereof, and it and claimed user's switching mechanism tripping coil L joins.Above-described physical circuit is a universal circuit, easily realizes.
The operation principle of this under-voltage protection device: see Fig. 2, give energy storage capacitor C8 charging through rectifier bridge B1 rectifying and wave-filtering and current-limiting resistance R5 from the alternating voltage (AC220V) a tunnel of electrical network input; One the tunnel gives TR transformer transformation after rectifier bridge B2 rectification, capacitor C2 filtering, operating voltage is provided for power amplification circuit T2 and after IC1 (LM7806) voltage stabilizing to voltage detecting circuit IC2 (LM293), pulse shaper IC3 (NE555) provide operating voltage.The negative terminal that testing circuit is sent into judging circuit IC2 by resistance R 1, R2, R3, RW and R4 bleeder circuit to the variation of input voltage is monitored, and is supplied with another input of IC2 by resistance R 7, R8 gained reference voltage.The under-voltage protection point voltage is regulated by potentiometer RW; when monitoring line voltage when dropping to under-voltage protection point; IC2 exports high level; after triode T1 polar switching, send into the input of IC3, after the IC3 shaping pulse, the output high level signal; after triode T2 power amplification, go starter relay J work; make under-voltage protection device output voltage signal drive outside tripping coil L work, the work of starting switch mechanism disconnects back level user and electrical network.
Claims (1)
1; a kind of electronic type alternating current 220V switching mechanism under-voltage protection device; it is characterized in that it is by voltage conversion circuit (1); at two dc output end 1.; 2. be connected with accumulator (2) respectively; three-terminal voltage-stabilizing circuit (3); wherein 1. output also is connected to bleeder circuit (4); 2. output also is connected to drive circuit (7); a bleeder circuit and a voltage detecting circuit (5) join; output at voltage detecting circuit connects a pulse shaper (6); pulse shaper is connected with power switch circuit (8) by drive circuit (7); wherein three-terminal voltage-stabilizing circuit (3) respectively with voltage detecting circuit; pulse shaper connects; and provide operating voltage; the output of described accumulator (2) and power switch circuit (8) join, and the other end of power switch circuit is connected on claimed user's the switching mechanism tripping coil L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02259052 CN2586276Y (en) | 2002-12-11 | 2002-12-11 | Low-voltage protector of electronic a.c 220V switching gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02259052 CN2586276Y (en) | 2002-12-11 | 2002-12-11 | Low-voltage protector of electronic a.c 220V switching gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2586276Y true CN2586276Y (en) | 2003-11-12 |
Family
ID=33726616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02259052 Expired - Fee Related CN2586276Y (en) | 2002-12-11 | 2002-12-11 | Low-voltage protector of electronic a.c 220V switching gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2586276Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463321C (en) * | 2004-12-23 | 2009-02-18 | 鸿富锦精密工业（深圳）有限公司 | Circuit for preventing chip from misoperation |
| CN101109787B (en) * | 2007-08-31 | 2010-09-29 | 天津市百利电气有限公司 | Intelligent detecting device for under-voltage releasing equipment of breaker |
| CN101630831B (en) * | 2009-08-03 | 2011-12-07 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
| CN102709127A (en) * | 2012-05-30 | 2012-10-03 | 江苏国星电器有限公司 | Low-voltage alternating current/direct current general under-voltage tripper |
-
2002
- 2002-12-11 CN CN 02259052 patent/CN2586276Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463321C (en) * | 2004-12-23 | 2009-02-18 | 鸿富锦精密工业（深圳）有限公司 | Circuit for preventing chip from misoperation |
| CN101109787B (en) * | 2007-08-31 | 2010-09-29 | 天津市百利电气有限公司 | Intelligent detecting device for under-voltage releasing equipment of breaker |
| CN101630831B (en) * | 2009-08-03 | 2011-12-07 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
| CN102709127A (en) * | 2012-05-30 | 2012-10-03 | 江苏国星电器有限公司 | Low-voltage alternating current/direct current general under-voltage tripper |
| CN102709127B (en) * | 2012-05-30 | 2014-09-17 | 江苏国星电器有限公司 | Low-voltage alternating current/direct current general under-voltage tripper |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201294387Y (en) | Energy-saving capacitance compensation switching controller | |
| CN201533148U (en) | Intelligent plastic-shell breaker tripper circuit | |
| CN2586276Y (en) | Low-voltage protector of electronic a.c 220V switching gear | |
| CN104103457B (en) | A kind of anti-shake electric controller circuit of contactor energy-saving | |
| CN201290009Y (en) | Automatic switching device for discharge resistance of compensation condenser | |
| CN202651766U (en) | Single-phase motor protective device | |
| CN201127073Y (en) | Capacitance voltage-distributing isolated form low-power consumption standby power supply | |
| CN201191761Y (en) | Current protection control device in 24kV vacuum circuit breaker | |
| CN202135235U (en) | Low power consumption standby circuit and TV | |
| CN201805219U (en) | Storage battery protector provided with time control function | |
| CN202797903U (en) | Automatic discharging device of reactive compensation capacitor | |
| CN204578381U (en) | The low standby switches power supply of a kind of controlled doubleway output | |
| CN204576180U (en) | Standby zero-power-consumption countdown timer | |
| CN207426673U (en) | The hardware circuit of control and protective switch equipment | |
| CN205622532U (en) | Switching power supply based on SP2605F | |
| CN205911962U (en) | High efficiency switching power supply | |
| CN101465608A (en) | Capacitance partial pressure isolated low power consumption standby power supply | |
| CN205847074U (en) | A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit | |
| CN205160065U (en) | Instantaneous circuit protector against power failure of industrial computer hardware facility | |
| CN214588623U (en) | Instant-action time relay | |
| CN2392200Y (en) | Automatic water supply monitor | |
| CN204179637U (en) | The under-voltage shunted exciter tripping control module of a kind of breaker of plastic casing | |
| CN213243516U (en) | Circuit breaker | |
| CN200976514Y (en) | Auto-switch controller | |
| CN216356073U (en) | Ultra-small charger 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 |