CN2335291Y

CN2335291Y - Multi-function protector

Info

Publication number: CN2335291Y
Application number: CN 98220548
Authority: CN
Inventors: 梁兆林
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-19
Filing date: 1998-03-19
Publication date: 1999-08-25
Anticipated expiration: 2008-03-19

Abstract

The utility model discloses a multi-function protector for protecting the wireless load control terminal device of the power system. The utility model is composed of an outer shell, a lightning protection purifying circuit, a power circuit, a voltage stabilizing reference circuit, a station frequent emitting sampling circuit, a signal discrimination circuit, a delay circuit, a direct current drive executive circuit, a power sampling circuit, a comparison amplifying circuit, an alternating current drive executive circuit and an alternating current load circuit. The utility model has the advantages of lightning protection purification on the alternating current power, the prevention protection on the over voltage and the under voltage of the power supply, limitation on the frequent emitting state of the station. The utility model can be used for the remote-control and remote-test end terminal device of the power system.

Description

A kind of multi-function protector

The utility model relates to a kind of multi-function protector, and particularly a kind of wireless negative control terminal multi-function protector belongs to electric and electronic technical field.

No specific electric load control appliance ruuning situation in the current power system is unsatisfactory always, and subject matter is that safe operation is of low quality.Usually the equal cisco unity malfunction of equipment in the following cases: the one, when thunderbolt takes place or the industry ripple of making an uproar is scurried into electrical network, the 2nd, if line voltage fluctuates, above-mentioned both of these case all can use all load control appliance cisco unity malfunctions of same electrical network or AC power even produce and damage; The 3rd, if the radio station is in the permanent fault state, not only the normal operation of whole load control system can take place to damage but also will seriously disturb in radio station itself.

The purpose of this utility model is to provide a kind of and can prevents to be struck by lightning and voltage ripple of power network and have the multi-function protector of the radio station often being sent out restriction.

The purpose of this utility model is realized by following technical scheme: a kind of multi-function protector, it comprises shell and control circuit.Its special character is: described control circuit comprises that lightning protection clean circuit, power circuit, voltage stabilizing reference circuit, power supply sample circuit, comparison amplifying circuit, AC driving executive circuit, AC load circuit, radio station often send out sample circuit, signal discrimination circuit, delay circuit and DC driven executive circuit.Lightning protection clean circuit (1) is serially connected with in the ac circuit of power circuit (2); The output of power circuit (2) connects power supply sample circuit (8) in regular turn, compares amplifying circuit (9), AC driving executive circuit (10) and AC load circuit (11), its previous stage circuit output end is as the input of back one-level circuit, power circuit (2) also links to each other with voltage stabilizing reference circuit (3), and the output of voltage stabilizing reference circuit (3) connects signal discrimination circuit (5), delay circuit (6), DC driven executive circuit (7) respectively, compares the input of amplifying circuit (9), AC driving executive circuit (10), AC load circuit (11); The radio station is often sent out sample circuit (4) and is connected signal discrimination circuit (5), delay circuit (6) and DC driven executive circuit (7) in regular turn, and the output of its previous stage circuit connects the input of back one-level circuit.

Special character of the present utility model also is: in described lightning protection clean circuit (1), piezo-resistance MY1-M Y3 is connected across respectively between the fire, zero line of AC power and between fire, zero line and ground wire, composition is to the amplitude limit network of thunderbolt voltage, inductance L 1-L4 is serially connected in respectively and forms the wave arrestment network on fire, the zero line, capacitor C 1-C6 is connected across between live wire and zero line and between fire, zero line and ground wire, forms the absorption network that absorbs the lightning surge electric current.

Often send out sample circuit (4) is made up of the normally-closed contact J1-1 of resistance R 24-R27 and relay J 1 in described radio station.After R26, the R27 parallel connection serial connection J1-1 again be connected across that radio station positive source input and output side goes into after R25 is in parallel, on goes out, R24 goes into to link to each other with .Voltage drop when J1-1 is in the open and close state respectively on the R25 changes, and the signal of this variation is exported as sampled signal by R24.

Described signal discrimination circuit (5) is made up of operational amplifier IC4 and peripheral cell.The in-phase input end of IC4 connects the radio station and often sends out sample circuit (4), and inverting input connects the mid point of RP3 and R3 series connection by R15, RP3 and R3 cross-over connection between positive source and ground, feedback resistance R16 of cross-over connection between the in-phase input end of IC4 and the output.

Described delay circuit (6) is made up of operational amplifier IC5 and peripheral cell.The inverting input of IC5 connects on the mid point of RP4, R3 series connection by R19, RP4, R3 and R30 series connection back cross-over connection are between positive source and ground, the in-phase input end of IC5 joins by the output of R18, R17 and signal discrimination circuit (5), the mid point that C11 is connected on R17 and R18 also links to each other with positive source by the D12 of reversal connection, reset button AN in parallel at the C11 two ends, D13 oppositely is attempted by on the R17.R17 and C11 form timing circuit, and D12, D13 then constitute a bleed-off circuit.

Described power supply sample circuit (8) is to be made of C2, RP1, RP2, is connected across between the output and ground of power circuit (2) after their series connection.

Described relatively amplifying circuit (9) is made of IC2, IC3 and peripheral circuit.IC2 and IC3 constitute under-voltage relatively amplifying circuit respectively and amplifying circuit is compared in overvoltage.The in-phase input end of IC2 and the inverting input of IC3 are received on the adjustable end of RP1, RP2 in the power supply sample circuit (8) by R5, R11 respectively, the inverting input of IC2 and the in-phase input end of IC3 connect R4, R14 series connection mid point by R6, R10 respectively, R4, R14 are connected across between positive source and the ground, be connected to feedback resistance R7, R9 between the output of IC2, IC3 and the in-phase input end respectively, at its two output each reversal connection D2 and D8, and serial connection R8 connects the mid point of positive source, series connection as output.

Special character of the present utility model also is: the sampled signal of described power supply sample circuit (8) can also come from another group secondary coil voltage of transformer T, the direct voltage that obtains through bridge rectifier and filtering.

The utility model can stop Lightning Over-voltage to scurry into equipment by AC power effectively and can absorb spike in the electrical network and the industry ripple of making an uproar, and avoids the infringement to negative control equipment; Can carry out the voltage fluctuation of AC network, under-voltage protection, prevent the abnormal voltage damage equipment; Have the radio station and often send out limitation function; in case permanent fault takes place in the radio station; when surpass setting-up time fault time, automatically shut down the parallel protection of radio station power supply; prevent permanent fault damage radio station and power supply and the normal operation of disturbing whole system; when the dispatching terminal remote measurement is failed; just can learn guilty culprit, after fixing a breakdown it be resetted, promptly enter normal operating conditions.The utility model can be widely used in the remote-control romote-sensing terminal equipment of electric power system, is the reliable and effective means of the normal operation of protection load control terminal.

Description of drawings:

Fig. 1 is an electric functional-block diagram of the present utility model,

Fig. 2 is the electrical schematic diagram of the utility model embodiment 1,

Fig. 3 is the electrical schematic diagram of the utility model embodiment 2.

Below in conjunction with the specific embodiment of the utility model that accompanying drawing provides, be used for the utility model is done detailed description.

Embodiment 1, with reference to figure 1, Fig. 2.In the lightning protection clean circuit (1) of present embodiment, piezo-resistance MY1-MY3 is connected across on the fire, zero line of AC power and fire, zero and ground wire between, inductance L 1-L4 is serially connected in respectively on live wire and the zero line, capacitor C 1-C6 is connected across between live wire, zero line and fire, zero and ground wire between.The primary coil of transformer T in the power circuit (2) is connected on fire after the lightning protection clean circuit (1), the zero line, and the two ends of secondary coil link to each other with assisting into end of bridge rectifier D 1-D4, and resistance R 1 is connected across between positive source and the ground.In the voltage stabilizing reference circuit (3), the input of IC1 links to each other with the output of power circuit (2), and its output is as signal output part and positive source, and earth terminal is by diode D ground connection, capacitor C 7-C10 be connected across positive source and between, reversal connection diode D5 between the input and output side of IC1.The radio station is often sent out in the sample circuit (4), resistance R 26, R27 parallel connection be connected in series again be connected in parallel on behind the normally-closed contact J1-1 of relay radio station positive source input go into go out with cathode output end on, on R25 is connected across that the anodal input and output side in radio station goes into, goes out.R24 is serially connected with that go into to go up and as signal output part.In the signal discrimination circuit (5), between R3, RP3 series connection back cross-over connection positive source and ground, its series connection mid point connects the IC4 inverting input by R15, and the in-phase input end of IC4 links to each other with R24, the output of IC4 and in-phase input end span connecting resistance R16.In delay circuit (6), be connected across between positive source and the ground after diode D12, capacitor C 11 series connection, the in-phase input end that D13, the R17 of its series connection mid point by parallel connection connects the output of signal discrimination circuit (5) and meet IC5 by R18, after connecting successively, R23, RP4, R30 be connected across between positive source and ground, the inverting input of IC5 connects the mid point that R23, RP4 connect by R19, and the output of IC5 is as signal output part.In DC driven executive circuit (7), the base stage of V1 connects the output of delay circuit (6) by R20, and relay coil J1, R21, the D15 of collector electrode by parallel connection connects positive source and R22, D16 ground connection by series connection, grounded emitter.In the power supply sample circuit (8), be connected across between the output and ground of power circuit (2) reversal connection D21 between positive source and IC4 in-phase input end after R2, RP1, the RP2 series connection.In comparing amplifying circuit (9), R4, R14 are connected across between positive source and the ground after connecting, its mid point connects the inverting input of IC2 and the in-phase input end of IC3 by R6, R10 respectively, and the in-phase input end of IC2 and the inverting input of IC3 connect the adjustable end of RP1, RP2 respectively.The in-phase input end of IC2, IC3 and output be cross-over connection R7 and R9 respectively, and its output is reversal connection D7, D8 and connect positive source by R8 respectively also, and the common port of D7, D8, R8 is as signal output part.In AC driving executive circuit (10), the base stage of V2 connects the output of comparison amplifying circuit (9) by R12, D9, collector electrode connects positive source and R13, R11 ground connection by connecting, its grounded emitter by the relay coil J1 and the diode D10 of parallel connection.In AC load circuit (11), the normally opened contact of relay is serially connected in the live wire end of AC power, and two supply sockets are connected across respectively between the fire, zero line of AC power.In the present embodiment, IC1 is 7812 type integrated regulators, and IC2-IC5 is a LM324 type four-operational amplifier, and triode V1, V2 are 3D6130 type NPN triode, and relay J 1 is a JQX-10F type miniature relay.

Embodiment 2 is with reference to Fig. 1, Fig. 3.Present embodiment and last embodiment difference are: in power supply sample circuit (8), another group secondary coil that has adopted transformer T is as original power supply sampled signal source, two inputs and the secondary coil of bridge rectifier D 17-D20 join, ground connection of two outputs, another is by C9, R1 in parallel and R2, RP1, the RP2 ground connection of series connection.In described AC driving executive circuit (10), the collector electrode of V1 connects positive source by the solid-state relay SSR DC control end and the resistance R 29 of series connection.In described AC load circuit (11), the interchange control end of solid-state relay SSR is serially connected in the live wire of AC power, and supply socket is connected across on the fire, zero line of AC power.SSR is the solid-state relay of 6A/600V.

Claims

1, a kind of multi-function protector, it includes shell and control circuit, it is characterized in that: described control circuit includes lightning protection clean circuit (1), power circuit (2), voltage stabilizing reference circuit (3), radio station and often sends out sample circuit (4), signal discrimination circuit (5), delay circuit (6), AC driving executive circuit (7), power supply sample circuit (8), amplifies comparison circuit (9), exchanges executive circuit (10), AC load circuit (11); Power circuit (2) connects power supply sample circuit (8) in regular turn, compares amplifying circuit (9), AC driving executive circuit (10), AC load circuit (11) and voltage stabilizing reference circuit (3), and the end of assisting out of its previous stage circuit links to each other with back one-level circuit input end; Voltage stabilizing reference circuit (3) is respectively with signal discrimination circuit (5), delay circuit (6), dc drive circuit (7), relatively amplifying circuit (9), AC driving executive circuit (10), AC load circuit (11) link to each other; The radio station is often sent out sample circuit (4) and is connected signal discrimination circuit (5), delay circuit (6), DC driven executive circuit (7) in regular turn, and its previous stage circuit output end connects back one-level circuit input end; Lightning protection clean circuit (1) is serially connected in the ac circuit of power circuit (2).

2, multi-function protector according to claim 1 is characterized in that:

1. in the described lightning protection clean circuit (1), piezo-resistance MY1-MY3 is connected across between the fire, zero line of AC power respectively and fire, zero and ground wire between, inductance L 1-L4 is serially connected in respectively on the fire, zero line of AC power, and capacitor C 1-C6 is connected across respectively between fire, zero line and fire, zero line and the ground wire of AC power;

2. described radio station is often sent out in the sample circuit (4), after resistance R 26, the R27 parallel connection normally-closed contact J1-1 of serial connection relay again be connected across that radio station positive source output goes into after R25 is in parallel, on goes out, one end and the of resistance R 24 go into to join, and the other end is a signal output part;

3. in the described signal discrimination circuit (5), the output that sample circuit (2) is often sent out in the in-phase input end of integrated circuit 1C4 and radio station links to each other and also links to each other with positive source by diode D21, the mid point of be connected across between positive source and the ground after resistance R 3, the potentiometer RP3 series connection, connecting connects the inverting input of IC4 by R15, and IC4 assists out end and in-phase input end span connecting resistance R16;

4. in the described delay circuit (6), diode D12 and the output that is connected across after capacitor C 11 is connected between positive source and the ground, the series connection mid point connects signal discrimination circuit (5) by resistance R 17 also connect the in-phase input end of IC5 simultaneously by resistance R 18, resistance R 23 be connected across after potentiometer RP4, R30 connect between positive source and the ground, the mid point of connecting connects the inverting input of IC5, the push-button switch AN in parallel at delay capacitor C11 two ends by resistance R 19;

5. in the described power supply sample circuit (8), the output of resistance R 2, potentiometer RP1, RP2 series connection back one termination power circuit (2), other end ground connection;

6. in the described relatively amplifying circuit (9), the inverting input of IC2 in-phase input end and IC3 connects the adjustable end of RP1, RP2 in the power supply sample circuit (8) respectively by resistance R 5, R11, reversal connection diode D7, D8 and connect positive source by resistance R 8 respectively on the output of cross-over connection resistance R respectively 7, R9, IC2, IC3 between the in-phase input end of IC2, IC3 and output, the common port of D7, D8, R8 is a signal output part.

3, multi-function protector according to claim 1; it is characterized in that: in the described power supply sample circuit (8), the sampled signal direct voltage that can also to be another group secondary coil voltage of coming from transformer T obtain through bridge rectifier D 17-D20 rectification and resistance R 1, capacitor C q filtering.