CN2220131Y - Multifunctional protector for single phase electrical equipment - Google Patents

Multifunctional protector for single phase electrical equipment Download PDF

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Publication number
CN2220131Y
CN2220131Y CN 94236222 CN94236222U CN2220131Y CN 2220131 Y CN2220131 Y CN 2220131Y CN 94236222 CN94236222 CN 94236222 CN 94236222 U CN94236222 U CN 94236222U CN 2220131 Y CN2220131 Y CN 2220131Y
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circuit
pin
resistance
ground connection
electric leakage
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CN 94236222
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Chinese (zh)
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张世清
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Abstract

The utility model discloses a multifunctional protector for single-phase electrical equipment, which comprises the knife switch of a single-phase power supply, an AC contactor, a voltmeter, an ammeter, a mutual inductor for the detection of current, a zero-sequence mutual inductor for the detection of electric leakage, an electric load, a regulated power supply, the indicating circuit of the power supply, an executive circuit, the energy-saving controlling circuit of a contactor, an under-voltage protective circuit, an over-current indicating circuit, an indicating circuit for electric leakage, a programmable timing circuit, and the self-protection of the protector. The protector has complete function, flexible action and safety is suitable for places with fire protection and explosion protection.

Description

The single-phase Protector for electric appliance of global function
The utility model relates to a kind of Protector for electric appliance, is applicable to the electrical equipment single-phase Protector for electric appliance of global function that the various abnormal conditions that occur monitor that is in operation.
China's patent patent No. " 91232328 " discloses a kind of household electricity and has prevented over-voltage and over-current protector; this protector is because the parameter value of Current Control is lower; just often; the starting of load makes protector produce misoperation easily; because its setting value is the starting current value of actual loading value+electrical equipment of maximum; so after the closer closure; starting at full capacity; can make overcurrent action and in short supply; and after the fault eliminating; can not send a telegram in reply automatically, in addition, for electric leakage, the effect of under voltage fault unprotect.
The purpose of this utility model provide a kind of can to electrical equipment carry out under voltage, overvoltage, overcurrent, electric leakage monitor, be active in one's movements quick, safe and reliable, according to user's needs, after fault is got rid of, the single-phase Protector for electric appliance of the global function that can send a telegram in reply automatically.
The purpose of this utility model can realize like this, comprise the single phase poaer supply knife switch, A.C. contactor, voltmeter, ammeter, current detection circuit, electric-leakage detection circuit, use electric loading, stabilized voltage power supply, output executing circuit, the contactor energy-saving control circuit, the under voltage indicating circuit, the overvoltage indicating circuit, the overcurrent indicating circuit, the electric leakage indicating circuit, timing circuit able to programme, also comprise protector autoprotection circuit, the under voltage protection circuit, excess voltage protection, the overload current circuit of adjusting, highly sensitive fast protection circuit, the detection of electrical leakage amplifying circuit, electric leakage overcurrent exclusive circuit, the electric leakage output amplifier, overcurrent locking delayed switching circuit, the fault alarm acoustics circuit, protector autoprotection circuit is connected between single phase poaer supply knife switch and the stabilized voltage power supply, under voltage protection circuit and negative stabilized voltage power supply are joined, it is exported one the tunnel and delivers to the under voltage indicating circuit, the programmable timing circuit is delivered on another road, excess voltage protection and negative stabilized voltage power supply are joined, it is exported one the tunnel and delivers to the overvoltage indicating circuit, timing circuit able to programme is delivered on another road, the output of current detecting instrument transformer is delivered to highly sensitive fast protection circuit through carrying current tuning circuit, highly sensitive fast protection circuit is exported one the tunnel and is delivered to the overcurrent indicating circuit, the programmable timing circuit is delivered to through overcurrent locking delayed switching circuit in another road, simultaneously through overcurrent locking delayed switching circuit, electric leakage overcurrent exclusive circuit, the electric leakage output amplifier is delivered to the programmable timing circuit; The output of detection of electrical leakage zero-sequence transformer is delivered to the electric leakage output amplifier through detection of electrical leakage amplifying circuit, electric leakage overcurrent exclusive circuit, and the electric leakage output amplifier is exported one the tunnel and delivered to the electric leakage indicating circuit, and the programmable timing circuit is delivered on another road; The programmable timing circuit is exported one the tunnel and is delivered to the fault alarm acoustics circuit, and A.C. contactor is delivered to through executive circuit, contactor energy-saving control circuit in another road.
The realization the purpose of this utility model also can be taked following measure; protector autoprotection circuit is formed in temperature relay PRJ and non-destructive insurance resistance PTC, control switch KK by being embedded in transformer B iron core; after connecting with control switch KK, PRJ and PTC join with power supply phase line UA; the other end through transformer B elementary with zero-power line UN join resistance R in the under voltage protection circuit 26With resistance R 27Be connected to the V-end of bridge rectifier QC1 after the series connection, resistance R 27Other end ground connection, resistance R 16One end and resistance R 26, R 27Dividing point joins, and its other end is connected to 10 pin of integrated four-operational amplifier IC1, resistance R 15One end and potentiometer RP 2Dividing point join, the other end is connected to 10 pin of IC1, potentiometer RP 2One end is through resistance R 14Be connected to positive stabilized voltage power supply, other end ground connection, 8 pin of IC1 are output, and it is exported one the tunnel and connects the under voltage indicating circuit, and another road is through resistance R 18Connect capacitor C 3One end is again through diode D 3Connect 6 pin of IC3 in the programmable timing circuit, 9 pin of IC1 are through resistance R 17Ground connection.
Resistance R in the excess voltage protection 26With R 27Be connected in series in bridge rectifier QC1 and V-one end, resistance R 27Other end ground connection, resistance R 22One end and resistance R 26, R 27Dividing point join, the other end is connected to 13 pin of integrated four-operational amplifier IC1,12 pin of IC1 are through resistance R 23Ground connection, 14 pin of IC1 are exported one the road and are taken over voltage indicating circuit, and another road is through resistance R 24Connect capacitor C 4An end, again through diode D 4Be connected to 6 pin of IC3 in the timing circuit able to programme.
Overload current is adjusted, and bridge rectifier QC2 in the circuit exchanges two ends and current transformer 4 joins, the minus earth of QC2, its positive pole and capacitor C 1, potentiometer RP 1An end join C 1, RP 1Other end ground connection.
Resistance R in the highly sensitive fast protection circuit 4One termination potentiometer RP 1Dividing point, 6 pin of another termination IC1, resistance R 3One end and resistance R 1, R 2Dividing point joins, and the other end is connected to 6 pin of IC1, and 5 pin of IC1 are through R5 ground connection, and its 7 pin is exported one the road and taken over the stream indicating circuit, and another road is through resistance R 6Connect 2 pin of IC1, resistance R 10One end and resistance R 8, R 9Join, its other end is connected to 2 pin of IC1, and 3 pin of IC1 are through resistance R 11Ground connection, its 1 pin output is through resistance R 12, diode D 2Join with the diverter switch 4K in the overcurrent locking delayed switching circuit.
Resistance R in the detection of electrical leakage amplifying circuit 28, capacitor C 5Be connected between the K1 and K2 of detection of electrical leakage zero-sequence transformer, the K1 of detection of electrical leakage zero-sequence transformer connects 1 pin of electric leakage integrated circuit (IC) 2, and the K2 of detection of electrical leakage zero-sequence transformer is through resistance R 29Connect 2 pin of IC2, the 3 pin ground connection of IC2, its 4 pin output is through diode D 5With capacitor C 6Series connection ground connection, simultaneously 4 pin are exported one the tunnel and are connect 6 pin through diode D5, and another road is through diode D 5With voltage-stabiliser tube DW 1One end joins.
Voltage-stabiliser tube DW in the electric leakage overcurrent exclusive circuit 1Connect 5 pin of IC2, the 6 foot meridian capacitor C of IC2 7Connect 7 pin of IC1,7 pin connect capacitor C again 87 pin of one end, IC2 meet diode D 6One end, C 8Other end ground connection, 7 pin of IC2 are through diode D 6Meet triode BG 1Base stage, BG 1Utmost point connecting resistance R during emission 31With diode D 7One end, resistance R 31Other end ground connection, diode D 7The other end is connected to 6 pin of IC3 in the timing circuit able to programme, BG 1Collector electrode connects the electric leakage indicating circuit.
Overcurrent locking delayed switching circuit is made up of diverter switch 4K.Diverter switch 4K can be connected to electric leakage overcurrent exclusive circuit, also can be connected to timing circuit able to programme.
Resistance R in the fault alarm acoustics circuit 34, diode D 8Be serially connected with triode BG 2Base stage, BG 2Emitter meets positive stabilized voltage power supply, BG 2Collector electrode is through resistance R 35, voltage stabilizing fulgurite DW 21 pin of one termination audio ic IC4, electric loud speaker Dy is connected to 1 pin and the BG of IC4 3Between the collector electrode, DW 2One end, BG 3The 3 pin ground connection of emitter, IC4,2 pin of IC4 meet BG 3Base stage.
The utility model is owing to be that the overcurrent value can action rapidly in 0.05 second when being set point+0.2A (promptly greater than 2% set point); leakage current value can quick acting in 0.02 second greater than 0.05A (5mA) time; overvoltage, under voltage value+2V (overvoltage) ,-during 3V (under voltage); can in 0.1 second, make electrical equipment break away from power supply; therefore this protector has highly sensitive quick, multiple functional, safe and reliable characteristics; and can be according to user's needs; after fault is got rid of; can send a telegram in reply automatically, and be applicable to fire prevention, explosion-proof place.
Below in conjunction with drawings and Examples the utility model technology contents is described in detail.
Fig. 1 is the utility model functional-block diagram;
Fig. 2 is circuit theory diagrams of the present utility model.
With reference to Fig. 1, single phase poaer supply knife switch 1 one tunnel is through A.C. contactor 2, voltmeter and ammeter 3, current detecting instrument transformer 4, detection of electrical leakage zero-sequence transformer 5 is joined with load 6, another road joins through protector autoprotection circuit 8 and stabilized voltage power supply and power indicating circuit 9, under voltage protection circuit 10 and excess voltage protection 12 are delivered in stabilized voltage power supply and power indicating circuit 9 outputs respectively, under voltage indicating circuit 11 is delivered in 10 outputs one tunnel of under voltage protection circuit, programmable timing circuit 22 is delivered on another road, overvoltage indicating circuit 13 is delivered in excess voltage protection 12 outputs one tunnel, and programmable timing circuit 22 is delivered on another road; 4 outputs of current detecting instrument transformer are delivered to highly sensitive fast protection circuit 15 through carrying current tuning circuit 14, overcurrent indicating circuit 16 is delivered in highly sensitive fast protection circuit 15 outputs one tunnel, overcurrent locking delayed switching circuit 17 is delivered on another road, timing circuit 22 able to programme is delivered in 17 outputs one tunnel of overcurrent locking delayed switching circuit, and timing circuit 22 able to programme is delivered to through electric leakage overcurrent exclusive circuit 19, electric leakage output amplifier 20 in another road; 5 outputs of detection of electrical leakage zero-sequence transformer are delivered to electric leakage output amplifier 20 through detection of electrical leakage amplifying circuit 18, electric leakage overcurrent exclusive circuit 19, electric leakage indicating circuit 21 is delivered in 20 outputs one tunnel of electric leakage output amplifier, timing circuit 22 able to programme is delivered on another road, fault alarm acoustics circuit 24 is delivered in timing circuit 22 outputs one tunnel able to programme, and A.C. contactor 2 is delivered to through executive circuit 23, contactor energy-saving control circuit 7 in another road.
With reference to Fig. 2; power supply (～220V) phase line UA; zero line UN is through single phase poaer supply knife switch 1; A.C. contactor 2; voltmeter and ammeter 3; current detecting instrument transformer 4; detection of electrical leakage zero-sequence transformer 5 and load (electric light D; electric cooker L; refrigerator-freezer and washing machine; motor M; computer and television set Sh) 6 join; protector autoprotection circuit 8 places after the single phase poaer supply knife switch 1; before the A.C. contactor 2; control switch KK and the temperature relay PRJ that is embedded in transformer core; the non-destructive insurance resistance PTC termination power UA that joins that connects, the other end is through the elementary zero-power line UN that connects of transformer B.Elementary two ends of transformer B in stabilized voltage power supply and the power indicating circuit 9 respectively with power supply phase line UA, UN phase line, the secondary centre tap ground connection of transformer B, the secondary two ends of transformer B and bridge rectifier QC 1Join bridge rectifier QC 1Positive termination capacitor C 10, integrated three 1 pin of rectifying stabilized voltage power supply IC5, capacitor C 10The 2 pin ground connection of the other end, IC5, the 3 pin output positive stabilization voltage of IC5 connects capacitor C 11, C 12, capacitor C 11, C 12Other end ground connection constitutes positive stabilized voltage power supply; Bridge rectifier QC 1Negative terminal connect capacitor C 13, the negative stabilized voltage power supply IC6 of integrated three ends 1 pin, the 3 pin ground connection of IC6, its 2 pin output is connected to by resistance R 13, LED 1The power indicating circuit of forming connects capacitor C simultaneously 14, C 15, capacitor C 14, C 15Other end ground connection constitutes negative stabilized voltage power supply.Under voltage protection circuit 10 is by V-connecting resistance R 26, R 27The series connection dividing potential drop, resistance R 27Other end ground connection, dividing point is through sample resistance R 16Connect 10 pin of integrated four-operational amplifier IC1, resistance R 14, potentiometer RP 2A connect end and positive supply joins other end ground connection, potentiometer PR 2Dividing point is through resistance R 15Join with 10 pin of IC1,9 pin of IC1 are that end of oppisite phase is through resistance R 17Ground connection, 8 pin of IC1 are that output one road connects the resistance R in the under voltage indicating circuit 11 19, LED 2, LED 2Other end ground connection; Its another road is through current-limiting resistance R 18Connect capacitor C 3, an end is again through diode D 3Join with 6 pin of IC3 in the timing circuit 22 able to programme.Excess voltage protection 12 is by V-connecting resistance R 26, R 27The series connection dividing potential drop, resistance R 27Other end ground connection, dividing point is through sample resistance R 22Connect 13 pin of integrator operational amplifier IC1, potentiometer RP 3With resistance R 20Series connection back one termination positive supply, other end ground connection, potentiometer RP 3Dividing point is through resistance R 21Connect 13 pin of IC1,12 pin of IC1 are through resistance R 23Ground connection.14 pin of IC1 are output, and the resistance R in the voltage indicating circuit 13 is taken on the one road 25, LED 3, its another road is through resistance R 24Connect capacitor C 4One end, capacitor C 4Other end ground connection is again through diode D 4Connect 6 pin of IC3 in the timing circuit 22 able to programme.Current detecting instrument transformer 4 is series among the phase line UA and detects the output of actual loading current value and be connected to bridge rectifier QC 2Exchange two ends, QC 2The direct current negativing ending grounding, its anode is through capacitor C 1One termination potentiometer RP 1One end, capacitor C 1, potentiometer RP 1Other end ground connection, potentiometer RP 1Dividing point through resistance R 4Connect 6 pin of IC1, resistance R 1, R 2The negative reference voltage value of dividing potential drop is through resistance R 3Connect 6 pin of IC1,5 pin of IC1 are through resistance R 5Ground connection, 7 pin of IC1 are output, the resistance R in the stream indicating circuit 16 is taken on the one road 7, LED 4, LED 4Other end ground connection, its another road is through resistance R 6Join with 2 pin of IC1, through resistance R 8, R 9The positive voltage reference operating value of series connection dividing potential drop is through resistance R 10Be connected to 2 pin of IC1,3 pin of IC1 are through resistance R 11Ground connection, 1 pin of IC1 is an output, it is exported through resistance R 12, diode D 2Be connected to the diverter switch 4K in the overcurrent locking delayed switching circuit 17, diverter switch 4K one tunnel is changeable through voltage-stabiliser tube DW 1Be connected to 5 pin of IC2 in the electric leakage overcurrent exclusive circuit 19, another road can switch to 6 pin of the IC3 in the programmable timing circuit 22.Power supply phase line UA, zero line UN all pass detection of electrical leakage zero sequence current mutual inductor 5, experiment button AN and electric leakage simulation load resistance R 37Series connection is passed zero sequence current mutual inductor 5 one and is terminated at phase line UA, and the other end is connected to zero line UN, the unsymmetrical current that current transformer 5 produces detected electric leakage, the resistance R through being connected in parallel 28, capacitor C 5, being connected to 1 pin of IC2 by the K1 line of current transformer 5, its K2 line is through resistance R 29Be connected to 2 pin of IC2, the 3 pin ground connection of IC2, its 4 pin is the output of detection of electrical leakage amplifying circuit 18,4 pin of IC2 are through diode D 5Be connected to 5 pin of IC2, diode D 5Through capacitor C 6Ground connection, 5 pin of IC2 are the input of electric leakage amplification exclusive circuit 19, the capacitor C that 6 pin of IC2,7 pin connect 7For disturbing absorption edge, its 7 pin is the output of exclusive circuit 19, the 7 foot meridian capacitor C of IC2 8Ground connection is simultaneously also through diode D 6With triode BG 1Base stage join BG 1Collector electrode connects the LED in the electric leakage indicating circuit 21 5And resistance R 30, BG 1Emission collection connecting resistance R 31, diode D 7One end, resistance R 31Other end ground connection, diode D 7Another termination timing circuit 22 able to programme in 6 pin of IC3.The 1 pin connecting resistance R of IC3 in the timing circuit 22 able to programme 32, 2 pin connect capacitor C 9, 3 pin connecting resistance R 33, resistance R 32, R 33, capacitor C 9It connects their other end short circuit in parallel, the peripheral circuit of forming the oscillator among the timing circuit IC3 able to programme, 4 pin of IC3,11 pin are empty pin, the equal ground connection of 5,7,9,10 pin of IC3,12,13,14 pin of IC3 connect positive supply, 6 pin of IC3 are input, and its 8 pin is an output, and it exports one the tunnel through resistance R 36, voltage-stabiliser tube DW 3Meet triode BG 4Base stage, BG 4Grounded emitter, BG 4Relay J, diode D in parallel in collector electrode and the executive circuit 23 9Join, it exports another road through resistance R 34, diode D 8With triode BG 2Base stage join BG 2Emitter meet positive stabilized voltage power supply, BG 2Collector electrode through series resistance R 35Meet voltage-stabiliser tube DW 2, also join voltage-stabiliser tube DW simultaneously with 1 pin of IC4, the end of electric loud speaker Dy 2Other end ground connection, 2 pin of IC4 meet triode BG 33 pin of base stage, IC4, BG 3Grounded emitter, BG 3The other end of collector electrode and loud speaker DY joins.One end of contactor energy-saving control circuit 7 joins through control switch KK and power supply phase line UA, the other end joins with zero-power line UN, the elementary of transformer B, control switch KK one end is through carrying out relay normally open contact J, joining with piezo-resistance RTV, normally closed contact CJ, piezo-resistance RTV other end connecting to neutral line UN meets bridge rectifier D simultaneously 10-13Exchange an end, normally closed contact CJ shunt capacitance C 16After be connected to bridge rectifier D 10-13Exchange the other end, bridge rectifier D 10-13Be connected in series coil CJ ' between anode and the negative terminal.
The utility model belongs to time-delay automatic power type, in case the just outage of breaking down also can utilize K switch K people to be outage.After 19 lockings of electric leakage overcurrent exclusive circuit, load is in off-position, after fixing a breakdown; have only after the control switch KK disconnection, its exclusive circuit 19 can reset, again with control switch KK closure; make the protector circuit be in normal condition, delaying time can be to the load automatic power after 5 minutes.
Need to prevent fires, explosion-proof place will place diverter switch 4K electric leakage overcurrent exclusive circuit 19, after fault is got rid of, needs manually telegram in reply.General place can place diverter switch 4K timing circuit 22 able to programme, and after fault was got rid of, automatic time delay 5 minutes can be sent a telegram in reply.
After faults such as under voltage or overvoltage, overload are got rid of, the just upset automatically in 5 minutes of the IC3 time-delay in the timing circuit 22 able to programme, promptly input 6 pin are no-voltage, its output 8 pin are+6V, through resistance R 36, voltage-stabiliser tube DW 3, triode BG 4Conducting makes the closed power supply of the relay J in the executive circuit 17, and 8 pin of IC3 are again through resistance R 34, diode D 8Make BG 2End, make the IC4 outage remove sound equipment.
IC1 in the utility model is the MC4741 type, and IC2 is the LM54123 type, and IC3 is type 4541 types, and IC4 is the MX-01 type, and IC5 is the LM7812 type, and IC6 is the LM7912 type.

Claims (2)

1, the single-phase Protector for electric appliance of a kind of global function, comprise single phase poaer supply knife switch (1), A.C. contactor (2), voltmeter and ammeter (3), current detecting instrument transformer (4), detection of electrical leakage zero-sequence transformer (5), with electric loading (6), stabilized voltage power supply and power indicating circuit (9), output executing circuit (23) contactor energy-saving control circuit (7), under voltage indicating circuit (11), overvoltage indicating circuit (13), electric leakage indicating circuit (21), timing circuit able to programme (22), it is characterized in that: also comprise protector autoprotection circuit (8), under voltage protection circuit (10), excess voltage protection (12), the overload current circuit (14) of adjusting, highly sensitive fast protection circuit (15), detection of electrical leakage amplifying circuit (18), electric leakage overcurrent exclusive circuit (19), electric leakage output amplifier (20), overcurrent locking delayed switching circuit (17), fault alarm acoustics circuit (24), protector autoprotection circuit (8) is connected between single phase poaer supply knife switch (1) and stabilized voltage power supply and the power indicating circuit (9), under voltage protection circuit (10) joins with stabilized voltage power supply and power indicating circuit (9), it is exported one the tunnel and delivers to another road of under voltage indicating circuit (11) and deliver to program timing circuit able to programme (22), excess voltage protection (12) joins with stabilized voltage power supply and power indicating circuit (9), it is exported one the tunnel and delivers to overvoltage indicating circuit (13), and programmable timing circuit (22) is delivered on another road; Current detecting instrument transformer (4) is delivered to highly sensitive fast protection circuit (15) through the whole device circuit (14) of live stream; overcurrent indicating circuit (16) is delivered in highly sensitive fast protection circuit (15) output one tunnel; another road is through overcurrent locking delayed switching circuit (17); deliver to timing circuit able to programme (22); one the tunnel through electric (17) of overcurrent locking time-delay switching simultaneously; electric leakage overcurrent exclusive circuit (19); electric leakage output amplifier (20) is delivered to programmable timing circuit (22); detection of electrical leakage zero-sequence transformer (5) output is through detection of electrical leakage amplifying circuit (18); electric leakage overcurrent exclusive circuit (19) is delivered to electric leakage output amplifier (20); electric leakage indicating circuit (21) is delivered in electric leakage output amplifier (20) output; timing circuit able to programme (22) is delivered on another road, and fault alarm acoustics circuit (24) is delivered in timing circuit able to programme (22) output one tunnel; another road is through executive circuit (23); contactor energy-saving control circuit (7) is delivered to A.C. contactor (2).
2, the single-phase Protector for electric appliance of global function according to claim 1, it is characterized in that: elementary and zero-power line UN joins through transformer B for the temperature relay PRJ in the protector autoprotection circuit (8) and non-destructive insurance resistance PTC and control switch KK series connection power supply phase line UA, the other end; Resistance R in the under voltage protection circuit (10) 28With resistance R 27Be connected in series in bridge rectifier QC1 and V-end, resistance R 27Other end ground connection, resistance R 16One terminating resistor R 26, R 27Dividing point, its other end are connected to 10 pin and the resistance R of integrated four-operational amplifier IC1 15The other end, resistance R 15The dividing point of another termination potentiometer RP2,9 pin of IC1 are through resistance R 17Ground connection, potentiometer RP2 one end is through resistance R 14Be connected to positive stabilized voltage power supply, other end ground connection, 8 pin of IC1 are output, it is exported one the tunnel and connects under voltage indicating circuit (11), another path resistor R 18Connect capacitor C 3End is again through diode D 3Connect 6 pin of IC3 in the programmable timing circuit (22); Resistance R in the excess voltage protection (12) 26With resistance R 27Be connected in series in bridge rectifier QC1 two ends and V-end, resistance R 27Other end ground connection, resistance R 22-end and resistance R 26, R 27Dividing point joins, 13 pin of the integrated four-operational amplifier IC1 of another termination, and 12 pin of IC1 are through resistance R 23Ground connection, 14 pin of IC1 are exported one the road and are taken over voltage indicating circuit (13), and another road is through resistance R 24Connect capacitor C 4An end, again through diode D 4Be connected to 6 pin of IC3 in the timing circuit able to programme (22); The overload current bridge rectifier QC in the circuit (14) that adjusts 2Two ends and current transformer (4) join QC 2Minus earth, its positive pole and capacitor C 1, potentiometer RP1 an end join the other end ground connection of C1, RP1; 6 pin of IC1 in the highly sensitive fast protection circuit (15) are through resistance R 4Meet potentiometer RP1 and divide piezoelectricity point, resistance R 3One end and resistance R 1, R 2Dividing point join, 6 pin of its another termination IC1,5 pin of IC1 are through R 5Ground connection, its 7 pin are exported one the road and are taken over stream indicating circuit (16), and another road is through resistance R 6Connect 2 pin of IC1, resistance R 10One end and resistance R 8, R 9Dividing point joins, its another connect 2 pin of IC1,3 pin of IC1 are through resistance R 11Ground connection, its 1 pin output is through resistance R 12, diode D 2Join with the diverter switch 4K in the overcurrent locking delayed switching circuit (17), diverter switch 4K one tunnel can switch to electric leakage overcurrent exclusive circuit (19), and another road can switch to timing circuit able to programme (22); Resistance R in the detection of electrical leakage amplifying circuit (18) 28, capacitor C 5Be connected between the K1 line and K2 line of detection of electrical leakage zero-sequence transformer (5), the K1 line of detection of electrical leakage zero-sequence transformer (5) connects 1 pin of electric leakage integrated circuit (IC) 2, and the K2 line connects 2 pin of IC2 through resistance R 29, the 3 pin ground connection of IC2, and its 4 pin output is through diode D 5, capacitor C 6Ground connection, its 5 pin is also through capacitor C 6Ground connection; Voltage-stabiliser tube D in the electric leakage overcurrent exclusive circuit (19) W1, connect 5 pin of IC2, the 6 foot meridian capacitor C of IC2 7Connect capacitor C 87 pin of one end, IC2 and diode D 6One end, C 8Other end ground connection, the 7 foot meridian capacitor C of IC2 8Ground connection, the diode D in 7 pin of IC2 and the electric leakage output amplifier (20) 6One end joins; Diode D in the electric leakage output amplifier (20) 6Another termination triode BG 1Base stage, BG 1Emitter connecting resistance R 31With diode D 7One end, resistance R 31Other end ground connection, diode D 7The other end is connected to 6 pin of IC3 in the timing circuit able to programme (22), triode BG 1Collector electrode connects electric leakage indication road (21); 8 pin of programmable timing circuit IC3 are exported one the tunnel and are connect fault alarm acoustics circuit (24), and another road connects executive circuit (23); Resistance R in the fault alarm acoustics circuit 34, diode D8 is serially connected with triode BG 2Base stage, BG 2Emission meets positive stabilized voltage power supply, BG 2Collector electrode is through resistance R 35, voltage-stabiliser tube DW 21 pin of one termination audio ic IC4, electric loud speaker DY is connected to 1 pin and the BG of IC4 3Between the collector electrode, voltage-stabiliser tube DW 2One end, BG 3The 3 pin ground connection of emitter, IC4,2 pin of IC4 meet BG 3Base stage.
CN 94236222 1994-12-30 1994-12-30 Multifunctional protector for single phase electrical equipment Expired - Fee Related CN2220131Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 94236222 CN2220131Y (en) 1994-12-30 1994-12-30 Multifunctional protector for single phase electrical equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 94236222 CN2220131Y (en) 1994-12-30 1994-12-30 Multifunctional protector for single phase electrical equipment

Publications (1)

Publication Number Publication Date
CN2220131Y true CN2220131Y (en) 1996-02-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 94236222 Expired - Fee Related CN2220131Y (en) 1994-12-30 1994-12-30 Multifunctional protector for single phase electrical equipment

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CN (1) CN2220131Y (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006042450A1 (en) * 2004-10-21 2006-04-27 South China Engineering & Manufacture Ltd A short circuit breaker without electric contac

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006042450A1 (en) * 2004-10-21 2006-04-27 South China Engineering & Manufacture Ltd A short circuit breaker without electric contac

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