CN201290000Y - Full-automatic intelligent lightning protection ultra-undervoltage protector - Google Patents

Abstract

The utility model discloses a full-automatic intelligent lightning-protection overvoltage-undervoltage protector, which comprises a sampling circuit, a overvoltage-undervoltage voltage control circuit, a delay circuit, a drive circuit, a relay J and the like. Compared with the prior art, the utility model has the advantages that the power supply of an electronic can be delayed during electrifying, and be cut off fast and automatically when the voltage is over-high or over-low, and can delay 180S to supply power to the electronic when the voltage is restored to a normal value, so as to enable the household electronic to be effectively protected instead of being burnt out; when the electronic is attacked by lightning stroke, the lightning-protection module can perform the shunting-limiting function; and when partial current of the lightning escapes the lightning-protection module and enters into a circuit, and the self-protection type lightning-protection circuit induced voltage achieves the discharge voltage of a transient diode and the breakdown value of a varistor, a short circuit phenomenon is nearly formed, and a fuse is fused, so that the following circuit is protected. At the same time, except that the power supply of the overvoltage-undervoltage protection device is already cut off and the fuse is fused, the protector forms a fivefold protection with a lightning protection device, thereby effectively protecting the electronic.

Description

The under voltage protection device is crossed in the fully-automatic intelligent lightning protection

Technical field

The utility model belongs to the lightning protection, overvoltage of a kind of family expenses supply line voltage, the electronic apparatus protection equipment of under-voltage, time-delay.

Background technology

At present, universal day by day at household electrical appliance such as China's air-conditioning, refrigerator, television set, computers, but because of supply of electric power not enough and electricity consumption inequality, voltage ripple of power network is bigger, thunderbolt destroys, household electrical appliance so often be subjected to badly damaged.Though the overvoltage/undervoltage protector and the lightning arrester of household electrical appliance is more on the market; but do not have incorporate product; wherein cross device under proteciton and probably be divided into two classes; one class is made up of fuse or protective tube, piezo-resistance, over-voltage protection element; when voltage surpasses its protection value, protection component work, fuse or protective tube blow; in time cut off the electricity supply, play a protective role.This class protector when voltage recovers just often, can not recover energized automatically, uses very inconvenient.Another kind ofly form by protective circuit, relay or controllable silicon; when surpassing the protection value, voltage can cut off the electricity supply automatically; and voltage recovers just often can not recover automatically energized; yet the possibility that this series products breaks down is very high; and do not have functions such as lightning protection, under-voltage, time-delay, can not play effective protection to supply line and household electrical appliance.Lightning protection device on the market probably is divided into two classes, and a class is that outside the building lightning rod is installed by portion, however indoor power consumption equipment still usually destroyed by thunderbolt, and can not extensively use, can only protect the part high building.Another kind of is the valve-type arrester of traditional structure; be with the metal oxide valve block directly and between power line and ground; serious or when being broken when valve block electric leakage by strong lightning current; tend to cause accidents such as electric power system short circuit, power failure; can not play the reliably protecting effect; and do not have functions such as overvoltage, under-voltage, time-delay, can not play effective protection to supply line and household electrical appliance.

Summary of the invention

The purpose of this utility model is to be to provide a kind of can have the fully-automatic intelligent lightning protection of good self-insurance's lightning protection performance, overvoltage/undervoltage time-delay to cross the under voltage protection device.

For achieving the above object; technical solution adopted in the utility model is: the under voltage protection device is crossed in a kind of fully-automatic intelligent lightning protection; it comprises sample circuit; cross the under voltage control circuit; delay circuit; drive circuit; relay J; sample circuit one end is connected with electrical network; the sample circuit other end is connected with overvoltage/undervoltage control circuit input; cross the under voltage control circuit and comprise comparator IC-1; IC-2; IC-3; sample circuit and comparator IC-1; the inverting input of IC-2 is connected; IC-1; IC-2 output respectively is connected in series a diode D2; D3; diode D2; the positive pole of D3 also is connected with voltage comparator ic-3 input; the output of voltage comparator ic-3 also is connected with the input of the drive circuit of being made up of triode Q3, relay J of serial connection on the Q3 collector electrode.

Compared with prior art, the utlity model has and to delay time when powering on, at overtension or cross when low can the quick automatic cut-off power supply, treat to delay time 180S to electric power supply after voltage returns to normal value electrical equipment time-delay power supply; Household electrical appliance are effectively protected and can not burn out; The lightning protection module has the effect of shunting amplitude limit to lightning wave when being subjected to being struck by lightning; when the part lightning current; avoid the lightning protection module; enter circuit; when self-insurance's lightning protection circuit induced voltage reaches the breakdown value of transient state diode discharge voltage and piezo-resistance; form almost short circuit phenomenon; and the fusing fuse; thereby the circuit of protection back; at this moment except that the overvoltage/undervoltage protective device is cut off the electricity supply already; fuse fuses again, has constituted five heavily protections, very effective protection electrical equipment with lightning protection device.

Description of drawings

Figure 1 shows that the lightning protection of the utility model fully-automatic intelligent crosses the circuit diagram of under voltage protection device.

Fig. 2 is the structural representation of lightning protection device.

Embodiment

Self protection type shown in Figure 1 is by lightning protection circuit 1; sample circuit 2; overvoltage/undervoltage control circuit 3; delay circuit 4; drive circuit 5; compositions such as relay J; line voltage is through resistance R 21; R22 ground connection in parallel; R22; between the diode D4 parallel connection power supply line; fuse series connection protection; capacitor C I step-down; the DB1 bridge rectifier; electric capacity EI filtering; voltage-stabiliser tube DWI resistance R 2; R3; triode Q1 parallel voltage-stabilizing; supply with the relay J power supply; again through resistance R 4; voltage-stabiliser tube DW2; the triode Q2 voltage stabilizing of connecting is supplied with ic chip 1-3 power supply, again through resistance R 5 step-downs; voltage-stabiliser tube DW3 voltage stabilizing; capacitor C 2; E3 filtering is as sampling voltage and its reference voltage relatively.Sample circuit is through resistance R 7 step-downs, diode D1 half-wave rectifier, electric capacity E4, C3 filtering, resistance R 8, R9, R10, R11, potentiometer RW dividing potential drop and its reference voltage relatively amplify through comparator IC1-1, IC1-3, control diode D2, D3 conducting and end, thereby control comparator IC1-3 in-phase end current potential is higher or lower than the inverting input reference voltage, makes comparator IC1-3 output high potential or electronegative potential, to drive output circuit work.

Voltage comparator ic 1-3 output also meets a light-emitting diode DD1, on the triode Q3 collector electrode and meet a light-emitting diode DD2.The utility model also includes resistance R 1, R12, R13, R14, R15, R17.

Shown in Figure 2 is the structural representation of lightning protection device.Fuse link 13, molten disconnected neck hole 14, pressure-sensitive valve block 16, electrode slice 15, pivoted arm 7, rotating shaft 6, inner housing 11, fault display window 12, outlet terminal 9, outlet 8, input terminal 17, inlet wire 18, extension spring 10 are wherein arranged.Inner casing is made by insulating material; middle part in inner casing is provided with pressure-sensitive valve block 16; draw an electrode slice 15 in a side of pressure-sensitive valve block 16; one end of fuse link 13 is connected on this electrode slice 15; the other end of fuse link 13 is connected with input terminal 17 by inlet wire 18; in order to improve the protection effect of fuse link 13, on fuse link 13, be provided with a square fusing neck hole 14.Pressure-sensitive valve block 16 outsides in inner casing also are provided with a pivoted arm 7, and the lower hinge of this pivoted arm 7 is in rotating shaft 6; The top of pivoted arm 7 is connected with an extension spring 10, and the other end of this extension spring 10 is connected on the interior side arm of inner casing, is connected with fuse link 13 at the middle part of pivoted arm 7.Outlet terminal 9 is connected with pressure-sensitive valve block 16 by outlet 8, at last at pressure-sensitive valve block 16 potting glue.For the ease of observing, be provided with red, green two colour tables on the top of pivoted arm 7, the corresponding inner casing in these two colour table tops is provided with a fault display window 12, and when normally moving, the green of pivoted arm 7 is aimed at watch window, shows fault-free.

Voltage comparator ic 1-1 output high potential IC1-2 output low level when line voltage is higher than 270V ± 3V, diode D3 conducting, comparator IC1-3 in-phase end current potential is lower than the end of oppisite phase current potential, comparator IC1-3 exports electronegative potential, not conducting of triode Q3 current collection very high electrode is that high potential flows to the bright relay J release of DD2 red light, disconnecting consumers power supply through R19.When line voltage returns to 245V ± 3V, comparator IC1-1 output is constant, IC1-2 output transfers high potential to, diode D2, D3 not conducting comparator IC1-3 in-phase end current potential with current potential resistance R 6, R16 is to the charging of electric capacity E5 and raise, when being charged to (being the delay recovery time) about 180 seconds, IC1-3 in-phase end positive potential is higher than end of oppisite phase IC1-3 output HIGH current, make light-emitting diode DD1 bright through resistance R 18, triode Q3 conducting, the relay J adhesive recovers electric, comparator IC1-1 output electronegative potential IC1-2 output electronegative potential IC1-2 output is constant when line voltage is lower than 170V ± 3V, and diode D2 conducting IC1-3 in-phase end current potential descends.After in like manner, the disconnecting consumers power supply.Comparator IC1-1 output transfers high potential to when line voltage returns to 190V ± 3V, and diode D2, D3 carry and end, and in like manner, IC1-3 in-phase end current potential raises to the charging of E5 with R6, R16.Delayed time 180 seconds, and recovered electric, thereby effectively protect power consumption equipment.

After thunder and lightning hits electrical network; thunder and lightning transmits along power line; very high lightning voltage causes power line voltage to raise; the overvoltage control circuit is cut off the electricity supply; when voltage reaches Transient Suppression Diode D4 discharge voltage and piezo-resistance R20, R21, R22 punctures; form almost short circuit phenomenon; heavy current is greater than fusing blown fuse value; blown fuse; piezo-resistance R21, R22 be ground connection simultaneously, and heavy current directly enters the earth, thereby makes circuit breaker; the circuit of protection product itself and back is realized five heavily protections.

If in servicely attacked by strong lightning current, form powerful short circuit current into and out of 9,17 of line terminals, heavy current is directly guided ground wire into by outlet terminal 9, when suffer especially big lightning wave impulse or seriously generate heat and when damaging module can break away from automatically, fuse link 13 cuts off short circuit current to earth immediately in the quick-break of square opening place; Pivoted arm 7 below moves to red face fault observation panel 12 positions in extension spring 10 effects.Be convenient to the attendant and can in time change new module.

Claims (1)

1; a kind of fully-automatic intelligent lightning protection overvoltage/undervoltage protector; it comprises sample circuit (2); cross under voltage control circuit (3); delay circuit (4); drive circuit (5); relay J; sample circuit (2) one ends are connected with electrical network; sample circuit (2) other end is connected with overvoltage/undervoltage control circuit (3) input; it is characterized in that the described under voltage control circuit (3) of crossing comprises comparator IC-1; IC-2; IC-3; sample circuit (2) and comparator IC-1; the inverting input of IC-2 is connected; IC-1; IC-2 output respectively is connected in series a diode D2; D3; diode D2; the positive pole of D3 also is connected with voltage comparator ic-3 input; the output of voltage comparator ic-3 also is connected with the input of the drive circuit of being made up of triode Q3 (5), relay J of serial connection on the Q3 collector electrode.

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