CN2353073Y - Full automatic emergency protective arrangement for electric power supply - Google Patents
Full automatic emergency protective arrangement for electric power supply Download PDFInfo
- Publication number
- CN2353073Y CN2353073Y CN 98229305 CN98229305U CN2353073Y CN 2353073 Y CN2353073 Y CN 2353073Y CN 98229305 CN98229305 CN 98229305 CN 98229305 U CN98229305 U CN 98229305U CN 2353073 Y CN2353073 Y CN 2353073Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- diode
- voltage
- autotransformer
- relay
- 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
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a full automatic emergency protective arrangement for electric power supply, comprising a casing, a low-voltage protection circuit 1, an automatic regulation circuit 2 and an overvoltage-overcurrent protection circuit 3. The diode D< 2 > and the capacitor C< 1 > of the low-voltage protection circuit 1 are connected in series and then connected with the negative terminal of the autotransformer B< 1 >. A relay J< 5 > is connected with the contacts of the diode D< 2 > and the capacitor C< 1 >. The diode D< 2 > and a capacitor C< 7 > arranged in the automatic regulation circuit 2 are connected in series. A relay J< 6 > and a variable resistor W are connected in series. The two groups of the series circuits are connected in parallel and then connected with the negative terminal of the autotransformer B< 2 >. Because the full automatic emergency protective arrangement for electric power supply of the utility model adopts the structure, the utility model not only has the function of automatic voltage regulation, but also has the function of timed guard. Simultaneously, the full automatic emergency protective arrangement for electric power supply also has the safety measurements that avoiding too high input voltage and load over current.
Description
The utility model belongs to the technical field of regulation voltage or current system, relates in particular to a kind of full-automatic power supply protector.
Existing power supply protector; Its performance is not really perfect, when load short circuits or input voltage are very high, all may burn out pressurizer; When input voltage was very low, protector can only output LOW voltage, and the low-voltage of output can not normally be used again, increased current loss.
Task of the present utility model is to provide the effect of a kind of existing automatic voltage regulation, delay protection, and the full-automatic power supply protector of avoiding the too high and load overcurrent of voltage to burn out the protector function is arranged again.
Full-automatic power supply protector of the present utility model includes low-voltage protection circuit, automatic voltage regulation circuit and overvoltage, current foldback circuit, and low-voltage protection circuit includes an autotransformer, a diode, an electric capacity and a relay; Be connected to the negative terminal of autotransformer after diode and the capacitances in series, relay is connected on the contact of diode and electric capacity, and anode one end of autotransformer is in series with switch, diode and resistance, and the other end and mains switch join; The automatic voltage regulation circuit includes an autotransformer, a diode, an electric capacity, a variable resistor and a relay, diode and capacitances in series are one group, it is one group that variable resistor is connected with relay, links to each other with the autotransformer negative terminal after two groups of parallel connections, and autotransformer anode one utmost point connects switch; Another utmost point connects transformer, and overvoltage, current foldback circuit one end are connected with low-voltage protection circuit, and the other end is connected with the automatic voltage regulation circuit, forms the loop.
Full-automatic power supply protector of the present utility model also comprises power supply adapter in the limited TV, and this adapter is made up of electric capacity, inductance coil and power supply integrated package of pressure-stabilizing.
The full-automatic power supply protector of above-mentioned utility model, its operation principle is as follows.Battery main switch is opened, and delay circuit enters wait state, divides to plant at 5-10 and powers from the trend power consumption equipment.Under the fluctuation of voltage, the height that is detected voltage by the automatic voltage regulation circuit is made control signal, under the effect of control signal, drives the tap that direct current relay changes autotransformer, reaches stable output voltage.If when operate as normal, when running into load short circuits or overshoot power,, current transformer increases because running into the electric current of autotransformer, and the secondary winding of current transformer has certain AC electromotive force, with this AC rectification filtering, becomes direct current.When short circuit current increases, when increasing the voltage to the direct current relay adhesive, the contact on relay road disconnects under the effect of magnetic force, cut off the power supply of delay circuit, voltage stabilizing circuit is closed output voltage at once, lost this big electric current on the elementary winding of current transformer simultaneously again, the direct current relay contact becomes normally open at once, delay circuit obtains working power again, wait for somewhat and could continue to power to the load after the kind, if load faulty is not got rid of, what relay and delay circuit went round and began again goes on, till fault is got rid of.The elementary winding of voltage transformer is the high pressure winding; When input voltage just often, secondary winding has only faint voltage, when voltage was higher than 280 volts, secondary winding had the voltage of suitable relay work, relay has had pick-up voltage, the input voltage of contact deenergization protector; Thereby protected power supply protector itself not burnt out by high pressure; If this high pressure is constant always, relay is always the contact adhesive, and input voltage just can not burn out protector always.
Power supply adapter operation principle is as follows in the cable TV: power supply enters inductance coil, because inductance coil itself has the effect that suppresses signal, adopts electric capacity to filter the TV signal that lefts in, and AC signal and TV signal are separated, and does not cause interference; Alternating current is inserted the rectification circuit of former amplifier, rectification circuit is changed into halfwave rectifier.When if defeated voltage of a specified duration is lower than 25 volts, do not reequip any part of former amplifier; If input voltage exceeds the working voltage of former amplifier; The filter capacitor that goes out end in halfwave rectifier changes high withstand voltage filter capacitor into.Other voltage regulator block that adds high pressure becomes the voltage of former amplifier.
Be illustrated in conjunction with the accompanying drawings below by specific embodiment:
Fig. 1 is the utility model embodiment circuit structure diagram.
Full-automatic power supply protector of the present utility model contains low-voltage protection circuit 1 automatic voltage regulation circuit 2 and overvoltage, current foldback circuit 3; Low-voltage protection circuit 1 includes an autotransformer B
1, a diode D
2, a capacitor C
1With a relay J
5, diode D
2With capacitor C
1Be connected to autotransformer B after the series connection
1Negative terminal, relay J
5Be connected to diode D
2With capacitor C
1Contact on; Autotransformer B
1Anode one utmost point be connected with K switch
5, Light-Emitting Diode D
6And resistance R
20, the other end and K switch
1Link to each other, when voltage is high, relay J
5Starting, K
5Automatically cut off power supply, and be connected to D
6And R
20An end that connects; To refer to purport and protection as superpressure.Automatic voltage regulation circuit 2 includes an autotransformer B
3, a diode D
5, a capacitor C
7With a relay J
6, autotransformer B
3Negative terminal be in series with a capacitor C
7With a diode D
5, relay J
6Be connected to diode D respectively after variable resistor W connects
5And capacitor C
7A contact on.When input voltage is high, autotransformer B
1The voltage height of coupling is by diode D
2After the rectification, relay J
5Output voltage is cut off in starting automatically; When load short circuits; Auto-transformer B
3The electric current that flows through is big; From amphitene circle B
3Negative pole on the voltage that obtains higher, electric current increases, relay J
6Starting, K
6Disconnect the complete machine power supply, thereby reach the protection purpose.
The operation principle of the full-automatic power supply protector of present embodiment is as follows, presses mains switch K
1, low-voltage protection circuit 1 autotransformer B
1Energising, autotransformer B
1Electric current is through the rectification of rectification diode, capacitor C
1Filtering, thus drive relay J
5With K switch
5Connect, reach and connect the complete machine power supply.When supply voltage is too low; Autotransformer B
1The electric current of induction is little, through diode D
2Can not drive relay J after the rectification
5, K switch
5Can not connect; Circuitry is not worked.When voltage fluctuates up and down; Automatic voltage regulation circuit 2 detects the height of voltage and makes control signal, drives relay J
6Change autotransformer B
3Tap, reach stable output voltage, when load because of certain reason short circuit or actual working load during greater than the specified load of this equipment, loop current increases in the circuit, autotransformer B in the automatic voltage regulation circuit 2
3The electric current of last induction increases, and the electric current of increase is through diode D
5Rectification, electrochemical capacitor C
7After the filtering, drive relay J
6, make K switch
1Disconnect, overvoltage, current foldback circuit 3 quit work; Delay time after a few minutes, overvoltage, current foldback circuit 3 are started working again, if still short circuit of load, this equipment repeats said process again and plays overcurrent protection, when the voltage of input is higher than 280 volts, and autotransformer B
1The electric current of responding on the last secondary winding is big; Through diode D
1Rectification, electrolytic capacitor C
1After the filtering, drive relay J
5Repeat above-mentioned overcurrent protection action, thereby play over-voltage protecting function.
Full-automatic power supply protector of the present utility model; owing to adopted low-voltage protection circuit and automatic voltage regulation circuit and overvoltage, current foldback circuit; so effect of the existing automatic voltage regulation of this protector; the function that delay protection is arranged is again avoided several insurance functions of the too high and load overcurrent of input voltage in addition.The power supply adapter is added in various types of amplifiers in the cable TV, on branch distributor, the line loss equalizer, just can with former outer electric power system complete change interior electric power system into.The former any equipment of need not dismantling only needs equipment component is added that adapter gets final product; Its view reception effect is constant, and its cost and commercially available comparing with class A amplifier A only account for 1/10.
Claims (2)
1, a kind of full-automatic power supply protector contains low-voltage protection circuit 1, automatic voltage regulation circuit 2 and overvoltage, current foldback circuit 3, it is characterized in that: low-voltage protection circuit includes an autotransformer B
1, a diode D
2, a capacitor C
1With a relay J
5, diode D
2With capacitor C
1Be connected to autotransformer B after the series connection
1Negative terminal, relay J
5Be connected to diode D
2And capacitor C
1Contact on, autotransformer B
1Anode one utmost point be connected with K switch
5, diode D
6And resistance R
20Be connected to K switch after the series connection
5On, another utmost point and K switch
1Link to each other, automatic voltage regulation circuit 2 includes an autotransformer B
2A diode D
5A capacitor C
7A relay J
6With a variable resistor W, diode D
5And capacitor C
7Series connection is one group, relay J
6Series connection is one group with variable resistor W, is connected to autotransformer B after two groups of parallel connections
2Negative terminal, anode and transformer B
3Join.
2, full-automatic power supply protector according to claim 1; it is characterized in that: overvoltage, current foldback circuit 3 are connected with power supply adapter 4 in the limited TV, and power supply adapter 4 is made up of electric capacity, inductance coil and power supply integrated package of pressure-stabilizing in this limited TV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98229305 CN2353073Y (en) | 1998-08-06 | 1998-08-06 | Full automatic emergency protective arrangement for electric power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98229305 CN2353073Y (en) | 1998-08-06 | 1998-08-06 | Full automatic emergency protective arrangement for electric power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2353073Y true CN2353073Y (en) | 1999-12-08 |
Family
ID=33979218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98229305 Expired - Fee Related CN2353073Y (en) | 1998-08-06 | 1998-08-06 | Full automatic emergency protective arrangement for electric power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2353073Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874121A (en) * | 2012-10-24 | 2013-01-16 | 安徽江淮汽车股份有限公司 | Main switch device of automobile power source and protection method of automobile circuit |
-
1998
- 1998-08-06 CN CN 98229305 patent/CN2353073Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874121A (en) * | 2012-10-24 | 2013-01-16 | 安徽江淮汽车股份有限公司 | Main switch device of automobile power source and protection method of automobile circuit |
| CN102874121B (en) * | 2012-10-24 | 2014-09-17 | 安徽江淮汽车股份有限公司 | Main switch device of automobile power source and protection method of automobile 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 |