CN201402965Y - Single-phase intelligent electricity utilization protecting device - Google Patents
Single-phase intelligent electricity utilization protecting device Download PDFInfo
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- CN201402965Y CN201402965Y CN2009201848370U CN200920184837U CN201402965Y CN 201402965 Y CN201402965 Y CN 201402965Y CN 2009201848370 U CN2009201848370 U CN 2009201848370U CN 200920184837 U CN200920184837 U CN 200920184837U CN 201402965 Y CN201402965 Y CN 201402965Y
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Abstract
The utility model discloses a single-phase intelligent electricity utilization protecting device comprising a main switch, a direct current voltage stabilizing circuit module, a single chip computer,a driving circuit module, an overvoltage/undervoltage detecting circuit module, a short circuit/ overload detecting circuit module, a leakage detecting circuit module and a default indicating circuitmodule. The main switch is connected in series with a single-phase power supply circuit; input ends of the three detecting circuit modules are respectively connected with the single-phase power supplycircuit for sampling, while output ends of the three detecting circuit modules are switched in an acquisition end of the single chip computer, while one output end of the single chip computer is connected with the main switch by the driving circuit module and the other output end thereof is connected with the default indicating circuit module; and the single-phase power supply circuit outputs andsupplies voltage needed by work of each part through the direct current voltage stabilizing circuit module. Compared with the traditional electricity utilization protecting device, the single-phase intelligent electricity utilization protecting device has automatic reclosure and on line detection functions, thus fundamentally resolving the conflict when a lightningproof product is matched with the electricity utilization protecting device for use, having complete protection function, being safer and more reliable, and truly realizing unattended electricity utilization management.
Description
Technical field
The utility model relates to a kind of single-phase intelligent type Protector for using electricity.
Background technology
Mainly contain at present: air switch, earth leakage circuit-breaker and empty leakage unit switch, fuse etc. in the communications industry and the civilian used traditional Protector for using electricity in field that waits.
Air switch is circuit breaker just; in circuit, make the usefulness of connection, disjunction and carrying rated operational current; protect when circuit or during situation such as power consumption equipment transships, short circuit; the dynamic and static contact and the feeler lever of circuit breaker are designed to parallel shape, and the electrodynamic repulsion force that utilizes short circuit to produce disconnects dynamic and static contact.When circuit is short-circuited or during serious overload current, short circuit current surpasses the instantaneous trip load current value, magnetictrip produces enough big suction, with the armature adhesive and clash into lever, make and have contact with rotate axle bed upwards rotation and snap close disengagement, latch under the effect of reaction spring three secondary main contact disjunctions, cut off the electricity supply.When general overload takes place in circuit, though overload current can not make the magnetictrip action, can make thermal element produce certain heat, impel bimetal leaf to be heated and be bent upwards, the promotion lever makes to have contact with snap close throws off, and with the main contact disjunction, cuts off the electricity supply.
Earth leakage circuit-breaker passes an O type magnet ring as elementary simultaneously with live wire and zero line, and secondary with electromagnetic mechanism of N circle output promotion, the electromagnetic mechanism action is then threaded off.Electric current under the normal condition on live wire and the zero line flows to and equals to flow out; so the secondary voltage that induces is zero; when live wire or zero line have single line that earth resistance or short circuit are arranged over the ground; then voltage difference appears in the electric current on live wire and the zero line; come out by secondary induction, cut off the electricity supply, consider from the personal safety angle when just promote electromagnetic mechanism disengagement major loop to certain difference; the earth leakage protective electric current generally is controlled in the 30mA, action in 0.1 second.
Much be installed in outdoor power consumption equipment; wide, poor working environment owing to distribute; a series of problems have been brought thus; wherein the most outstanding characteristics are safe power supply problems; requirement according to national standard and relevant industries standard; power consumption equipment outside all installation rooms also must install thunder resisting equipment protected additional except traditional Protector for using electricity such as earth leakage circuit-breaker or air switch should be installed.The operation principle of thunder resisting equipment is when the induction lightening ripple is invaded power supply or signal transmssion line, its internal lighting protection assembly will (＜25ns) response speed presents low impedance state with nanosecond, the earth of rapidly lightning current being released, to the overvoltage Limiting that causes by thunder and lightning in the withstand voltage scope that power consumption equipment can bear, guarantee the safe operation of electric equipment; But thunder resisting equipment can cause Protector for using electricity (air switch, leakage switch etc.) tripping operation when leakage current, especially at thunderstorm weather, causes the large tracts of land tripping operation especially easily; This has just produced the contradiction when traditional Protector for using electricity and lightning-protected product are supporting to be used.
According to statistics, can find to have approximately the leakage switch tripping operation of the outdoor power consumption equipment of 20%-30% at the weather of a thunderstorm, what the area that has was the most serious surpasses 50%, make the work of the outdoor electricity consumption device interrupt of large tracts of land, simultaneously, also because of awful weather, restorer work in time brings than large economy to national economy and to lose.In fact, these tripping operations only need artificial simple the combined floodgate, just can restorer work.But because can not automatic closing after the tripping operation of air switch, leakage switch, need manually to close a floodgate one by one, add that device distribution is too wide, number is too many, the mains switch that a lot of in addition equipment are contained in the field, wilderness, have is locked in residential dormitory, the unit compound, and giving resumes work brings great difficulty.And on the other hand; at present as above-mentionedly dropped into that the own function of traditional Protector for using electricity that protection uses is limited, protection not comprehensively, less reliable; especially the electric circuit inspection means are single; usually can the error changing of the relative positions; and lack online detection and Fault Identification indication behind the separating brake, usually cause false switching to cause security incident.
Summary of the invention
The utility model purpose is: the deficiency that exists at the traditional Protector for using electricity of mentioning in the background technology and provide a kind of can automatic reclosing and comprehensive, the safe and reliable single-phase intelligent type Protector for using electricity of safeguard function.
The technical solution of the utility model is: a kind of single-phase intelligent type Protector for using electricity comprises main switch, direct current regulation circuit module, single-chip microcomputer, drive circuit module, mistake/undervoltage detection circuit module, short circuit/overload detection circuit module, electric-leakage detection circuit module and failure indicating circuit module; Described main switch is serially connected on the single phase poaer supply circuit, and mistake/undervoltage detection circuit module, short circuit/overload detection circuit module and electric-leakage detection circuit module three's input is connected single phase poaer supply circuit up-sampling, and output then inserts the single-chip microcomputer collection terminal; An output of described single-chip microcomputer connects main switch through drive circuit module, another output connects the failure indicating circuit module, and described single phase poaer supply circuit power is through the output of direct current regulation circuit module and main switch, single-chip microcomputer, drive circuit module, failure indicating circuit module and each testing circuit module work required voltage are provided.
The module of direct current regulation circuit described in the utility model is by transformer T1, bridge rectifier D3, triode U2, three terminal regulator TL1, TL2, U3, resistance R 1～R4, and R19, filter capacitor C1～C7, C15 connects to form jointly; Wherein resistance R 1, three terminal regulator TL1, capacitor C 15, triode U2, resistance R 2, resistance R 3 connect to form voltage stabilizing expansion current circuit jointly; R19, TL2, C6 and C7 connect to form sample circuit; The single phase poaer supply circuit expands through T1 step-down, voltage stabilizing exports direct-current working volts VIN on one side after stream, C1 filtering are expanded in the current circuit voltage stabilizing after R4 step-down, C2 filtering, then continue output direct-current working volts VCC after C3 filtering, U3 voltage stabilizing, C4, C5 filtering on one side, VCC then exports DC reference voltage VREF again after sample circuit step-down, voltage stabilizing and filtering; Described main switch is by magnetic latching relay JD1, JD2, and diode D1, D2 and piezo-resistance RV4 are formed by connecting; Described drive circuit module is by optocoupler OP1, OP2, resistance R 5, R6, and R29～R34, triode Q1, Q2, chip for driving U1 is formed by connecting jointly; The main contacts of described JD1, JD2 is serially connected in respectively on the phase line L and center line N of single phase poaer supply circuit, and the main contacts that RV4 is serially connected between L and the N JD1 and JD2 carries out the Lightning Over-voltage protection; It is operating voltage that single-chip microcomputer U gets VCC, one road output control signal OUT1 is connected in series R29 after OP1 isolates, Q1 amplifies, U1 is connected respectively to the auxiliary contact of JD1, JD2 after driving and improving, and constitutes the loop with the coil of JD1, JD2 and the direct-current working volts VIN of access JD1, JD2 respectively; Another road output control signal OUT2 serial connection R20 of single-chip microcomputer U is after another auxiliary contact that OP2 isolates, Q2 amplifies, U1 is connected respectively to JD1, JD2 after driving and improving, and also respectively and the coil of JD1, JD2 and the direct-current working volts VIN that inserts JD1, JD2 constitutes loop D1 and D2 is connected between control signal OUT2 and the VIN respectively as relay protection circuit and between OUT1 and the VIN VCC insert OP1 respectively and OP2 one end is powered for their; VIN connects the emitter of Q1, Q2 respectively through resistance R 32, R31, and VIN connects the base stage of Q1, Q2 respectively through resistance R 33, R34 simultaneously; It is its power supply that VIN also inserts U1 through resistance R 5, R6.
Mistake described in the utility model/undervoltage detection circuit module is by resistance R 7～R12, R14, operational amplifier U4A, U4B, U4C, and adjustable resistance RW3, capacitor C 8 and voltage stabilizing didoe TV1 are formed by connecting jointly; The phase line L of single phase poaer supply circuit inserts the U4C negative input ends through resistance R 11 again after R7, R8 step-down, VREF raise level, U4A and follow; and center line N inserts the U4C positive input terminals through resistance R 12 again after R9, R10 step-down, VREF raise level, U4B and follow; two-way voltage is connected in series R14 after the differential amplification of U4C; after output voltage acquired signal ADU is to the collection port of single-chip microcomputer U after the C8 filtering, TV1 voltage-stabilizing protection, described adjustable resistance RW3 is connected between U4C negative input end and the output.
Short circuit described in the utility model/overload detection circuit module is by O type current transformer, adjustable resistance RW1, resistance R 16, R17, R18, and capacitor C 9, C10, voltage stabilizing didoe TV2, operational amplifier U4D are formed by connecting jointly; The single phase poaer supply circuit passes O type current transformer, RW1 and C9 all are serially connected between the phase line L and center line N of single phase poaer supply circuit, and C9 one termination is gone into the U4D positive input terminal, another termination of C9 VREF, should insert the U4D negative input end through R17 by end simultaneously, this negative input end connects the U4D output through R18; The current signal that O type current transformer induction obtains behind the RW1 voltage sample by VERF raise level, U4D amplifies back serial connection R16, after after the C10 filtering, TV2 voltage-stabilizing protection output current acquired signal ADI to the collection port of single-chip microcomputer U.
The module of electric-leakage detection circuit described in the utility model is by O type zero sequence current mutual inductor, adjustable resistance RW2, resistance R 20～R23, and capacitor C 11, C14, voltage stabilizing didoe TV3 and operational amplifier U5A connect and compose jointly; The single phase poaer supply circuit passes O type zero sequence current mutual inductor, RW2 and C11 all are serially connected between the phase line L and center line N of single phase poaer supply circuit, and C11 one end inserts U5A positive input terminal, another termination VREF through R20, should insert the U5A negative input end through R22 by end simultaneously, this negative input end connects the U5A output through R23; The current signal that O type zero sequence current mutual inductor induction obtains behind the RW2 voltage sample by VERF raise level, U5A amplifies back serial connection R21, after after the C14 filtering, TV2 voltage-stabilizing protection output current acquired signal ADN to the collection port of single-chip microcomputer U.
The module of failure indicating circuit described in the utility model constitutes VCC by current-limiting resistance R23～R28 and LED 1～LED6 and is connected on current-limiting resistance R23～R28 one end, and the other end of current-limiting resistance R23～R28 constitutes each self-loop through the output port of LED1～LED6 access single-chip microcomputer U respectively.
The U of single-chip microcomputer described in the utility model has the RS485 communication interface; adopt the MODBUS agreement; send all data acquisition amounts, switching value to monitor supervision platform; can carry out remote monitoring to supply line and load; convenient realization remote signalling, remote measurement, remote control; simultaneously, also can realize the online upgrading of the utility model intelligent power utilization protective device.
This single-phase intelligent type Protector for using electricity described in the utility model also comprises the anti-lightning strike surge protection module that connects the single phase poaer supply circuit; this anti-lightning strike surge protection module is made of the piezo-resistance and the discharge tube that are serially connected between phase line L and the center line N, by full mould protected mode the single phase power supply circuit is carried out protection.
The utility model is in running, cross/the undervoltage detection circuit module, short circuit/overload detection circuit module and electric-leakage detection circuit module detect in real time to the single phase poaer supply circuit, and will detect data and send single-chip microcomputer to and carry out judgment processing, if when detecting faults such as having overvoltage, under-voltage, short circuit, overload, electric leakage in the single phase poaer supply circuit, single-chip microcomputer can be implemented protection to protected equipment and power supply circuits in time by drive circuit module control main switch open circuit; In time show failure condition by the failure indicating circuit module simultaneously, for electric circuit inspection, fix a breakdown and provide convenience.
After main switch disconnects, three testing circuit modules will continue circuit is detected, and get rid of until fault, and the normal back of circuit single-chip microcomputer can in time be connected circuit by drive circuit module control main switch, guarantees the power consumption equipment operate as normal.If fault exists all the time, then main switch keeps disconnecting, and is excluded up to fault; Make electricity consumption safer reliable like this.
The utility model advantage is:
This single-phase intelligent type Protector for using electricity described in the utility model has the defencive function of main electric fault such as overvoltage, under voltage, overload, short circuit, electric leakage; and have functions such as Fault Identification, faulty indication, the detection of combined floodgate prior fault, remote monitoring, online modification parameter and software upgrading; compare with traditional Protector for using electricity; safeguard function is more comprehensive, and is more secure and reliable to use.
The utility model especially is fit to is used with thunder resisting equipment, when detecting the overvoltage that causes because of thunderbolt or overcurrent, and the protective device trip protection, and after the thunderbolt, detecting supply line recovers just often, protective device can restore electricity by automatic reclosing; Therefore the utility model fundamentally eliminated and lightning-protected product between the contradiction that exists, can really realize the unattended management of power use, further guarantee the Electrical Safety of outdoor power consumption equipment.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model (I);
Fig. 3 is circuit theory diagrams of the present utility model (II).
Embodiment
Embodiment: as shown in Figure 1, the described single-phase intelligent type of present embodiment Protector for using electricity is made of jointly main switch, direct current regulation circuit module, single-chip microcomputer, drive circuit module, mistake/undervoltage detection circuit module, short circuit/overload detection circuit module, electric-leakage detection circuit module, failure indicating circuit module and anti-lightning strike surge protection module.
Described main switch is serially connected on the single phase poaer supply circuit, and mistake/undervoltage detection circuit module, short circuit/overload detection circuit module and electric-leakage detection circuit module three's input is connected single phase poaer supply circuit up-sampling, and output then inserts the single-chip microcomputer collection terminal; An output of described single-chip microcomputer connects main switch through drive circuit module, another output connects the failure indicating circuit module, and described single phase poaer supply circuit power is through the output of direct current regulation circuit module and main switch, single-chip microcomputer, drive circuit module, failure indicating circuit module and each testing circuit module work required voltage are provided; Described anti-lightning strike surge protection module is connected on the single phase poaer supply circuit.
Specifically describe in conjunction with Fig. 2, composition and the function to embodiment each several part circuit module shown in Figure 3:
Be integrated with main switch, direct current regulation circuit module, mistake/undervoltage detection circuit module, short circuit/overload detection circuit module, electric-leakage detection circuit module, anti-lightning strike surge protection module and a part of drive circuit module on the BS plate shown in Figure 2; Then be integrated with single-chip microcomputer, failure indicating circuit module and another part drive circuit module on the CPU board shown in Figure 3; And be associated by the J1 terminal between BS plate and CPU board.
Direct current regulation circuit module on the BS plate is by transformer T1, bridge rectifier D3, triode U2, three terminal regulator TL1, TL2, U3, resistance R 1～R4, and R19, filter capacitor C1～C7, C15 connects to form jointly; Wherein resistance R 1, three terminal regulator TL1, capacitor C 15, triode U2, resistance R 2, resistance R 3 connect to form voltage stabilizing expansion current circuit jointly, and purpose is to improve the load capacity of direct current regulation circuit; And described R19, TL2, C6 and C7 connect to form sample circuit.
The DZ1 terminal of 220V single phase poaer supply circuit from the BS plate introduced, and phase line L one tunnel connects primary coil one end of transformer T1 through switch S K, and center line N one tunnel connects the primary coil other end; The secondary coil induction of transformer T1 and output low pressure, after expanding current circuit voltage stabilizing expansion stream, C1 filtering, voltage stabilizing passes through R4 step-down, C2 filtering output direct-current working volts VIN on one side, then continue on one side by C3 filtering, U3 voltage stabilizing, C4, C5 filtering output direct-current working volts VCC, VCC then exports DC reference voltage VREF again after sample circuit step-down, voltage stabilizing and filtering.
Described VCC inserts CPU board through the J1 terminal and is single-chip microcomputer U power supply.
Described anti-lightning strike surge protection module is formed by connecting jointly by piezo-resistance RV1, RV2, RV3 and discharge tube FD1, FD2, wherein is connected between phase line L and the center line N after RV1 and the FD1 series connection; Be connected on after RV2, RV3 and FD2 connect successively between phase line L and the center line N, FD2 is ground connection simultaneously.This anti-lightning strike surge protection module is carried out the lightning surge protection by full mould protected mode to single phase alternating current power supply, and discharging current reaches 10kA (8/20us).
Main switch is by magnetic latching relay JD1, JD2, and diode D1, D2 and piezo-resistance RV4 are formed by connecting; Described drive circuit module is by optocoupler OP1, OP2, resistance R 5, R6, and R29～R34, triode Q1, Q2, chip for driving U1 is formed by connecting jointly; Wherein R5, R6, U1 are integrated on the BS plate shown in Figure 2, and R29～R34, OP1, OP2, Q1, Q2 are integrated on the CPU board shown in Figure 3.
The main contacts of described JD1, JD2 is serially connected in respectively on the phase line L and center line N of single phase poaer supply circuit, and the main contacts that RV4 is serially connected between L and the N JD1 and JD2 carries out the Lightning Over-voltage protection; Single-chip microcomputer U on the CPU board gets VCC as operating voltage from the J1 terminal, control signal OUT1 serial connection R29 in one road is after OP1 isolates, Q1 amplifies, be connected to U1 on the BS plate by the J1 terminal again, after U1 drives raising, be connected respectively to the auxiliary contact of JD1, JD2, and constitute the loop with the coil of JD1, JD2 and the direct-current working volts VIN of access JD1, JD2 respectively; Another road control signal OUT2 of single-chip microcomputer U serial connection R20 is after OP2 isolates, Q2 amplifies, be connected to U1 on the BS plate by the J1 terminal again; after drive improving, U1 is connected respectively to another auxiliary contact of JD1, JD2, and also respectively and the coil of JD1, JD2 and the direct-current working volts VIN that inserts JD1, JD2 constitutes loop D1 and D2 is connected between control signal OUT2 and the VIN respectively as relay protection circuit and between OUT1 and the VIN.
CPU board is got VCC from the J1 terminal and is inserted OP1 and OP2 one end, as their operating voltage; Get VIN simultaneously through the emitter that resistance R 32, R31 connect Q1, Q2 respectively, get VIN connects Q1, Q2 respectively through resistance R 33, R34 base stage simultaneously.The BS plate is got VIN and is its power supply through resistance R 5, R6 access U1.Single-chip microcomputer U output control signal OUT1 is a low level, relay J D1, JD2 adhesive when OUT2 is high level, energized, OUT1 is a high level, OUT2 be low spot at ordinary times, relay J D1, JD2 disconnect, and cut off the electricity supply.
Described mistake/undervoltage detection circuit module is by resistance R 7～R12, R14, operational amplifier U4A, U4B, U4C, and adjustable resistance RW3, capacitor C 8 and voltage stabilizing didoe TV1 are formed by connecting jointly; The phase line L of single phase poaer supply circuit inserts the U4C negative input ends through resistance R 11 again after R7, R8 step-down, VREF raise level, U4A and follow, and center line N inserts the U4C positive input terminals through resistance R 12 again after R9, R10 step-down, VREF raise level, U4B and follow, two-way voltage is connected in series R14 after the differential amplification of U4C, after output voltage acquired signal ADU after the C8 filtering, TV1 voltage-stabilizing protection, this signal ADU is connected to CPU board through the J1 terminal, thereby inserts the collection port of single-chip microcomputer U; Described adjustable resistance RW3 is connected between U4C negative input end and the output, can set overvoltage and under-voltage protection operation voltage value by regulating adjustable resistance RW3.
Described short circuit/overload detection circuit module is by O type current transformer, adjustable resistance RW1, resistance R 16, R17, R18, and capacitor C 9, C10, voltage stabilizing didoe TV2, operational amplifier U4D are formed by connecting jointly; The single phase poaer supply circuit passes O type current transformer (not drawing among the figure), and this O type current transformer is connected on the J2 terminal among Fig. 2; RW1 and C9 all are serially connected between the phase line L and center line N of single phase poaer supply circuit, and C9 one termination is gone into the U4D positive input terminal, and another termination of C9 VREF should insert the U4D negative input end through R17 by end simultaneously, and this negative input end connects the U4D output through R18; The current signal that the induction of O type current transformer obtains is raised level, U4D amplification back serial connection R16 by VERF behind the RW1 voltage sample, after output current acquired signal ADI after the C10 filtering, TV2 voltage-stabilizing protection, this signal ADI is connected to CPU board through the J1 terminal, thereby inserts the collection terminal of single-chip microcomputer U; Can set overload and open circuit protection operating current value by regulating adjustable resistance RW1.
Described electric-leakage detection circuit module is by O type zero sequence current mutual inductor, adjustable resistance RW2, resistance R 20～R23, and capacitor C 11, C14, voltage stabilizing didoe TV3 and operational amplifier U5A connect and compose jointly; The single phase poaer supply circuit passes O type zero sequence current mutual inductor (not drawing among the figure), and this O type zero sequence current mutual inductor is connected on the J3 terminal among Fig. 2; RW2 and C11 all are serially connected between the phase line L and center line N of single phase poaer supply circuit, C11 one end inserts the U5A positive input terminal through R20, another termination VREF, should insert the U5A negative input end through R22 by end simultaneously, this negative input end through R23 connect current signal that U5A output O type zero sequence current mutual inductor induction obtains behind the RW2 voltage sample by VERF raise level, U5A amplifies back serial connection R21, after output current acquired signal ADN after the C14 filtering, TV2 voltage-stabilizing protection, this signal ADN is connected to CPU board through the J1 terminal, thereby inserts the collection terminal of single-chip microcomputer U; Can set earth leakage protective operating current value by regulating adjustable resistance RW2.
Described failure indicating circuit module is made of current-limiting resistance R23～R28 and LED 1～LED6.CPU board is got VCC from the J1 terminal and is connected on current-limiting resistance R23～R28 one end, and current-limiting resistance R23～R28 other end constitutes each self-loop through the output port of LED1～LED6 access single-chip microcomputer U respectively.Wherein LED1 is under-voltage indicator light, and LED2 is the overvoltage indicator light, and LED3 is the electric leakage indicator light, and LED4 is an overload light, and LED5 is the short circuit indicator light, and LED6 is a power supply indicator.
Also be connected with toggle switch SS-13D01-G4 on the U of single-chip microcomputer described in the present embodiment, two inputs difference output signal SEL1, the SEL2 of this toggle switch SS-13D01-G4 are to single-chip microcomputer U, can set the load current value of present embodiment protective device by stirring this toggle switch: when SEL1 is a low level, when SEL2 was high level, corresponding rated current was 32A; When SEL1 and SEL2 were high level, corresponding rated current was 25A, and when SEL1 is a high level, when SEL2 was low level, corresponding rated current was 16A.
The U of single-chip microcomputer described in the present embodiment has the RS485 communication interface; adopt the MODBUS agreement; send all data acquisition amounts, switching value to monitor supervision platform; can carry out remote monitoring to supply line and load; convenient realization remote signalling, remote measurement, remote control; simultaneously, also can realize the online upgrading of the utility model intelligent power utilization protective device.
The course of work to present embodiment single-phase intelligent type Protector for using electricity is described further below:
Start: SK closes a switch, connect the protective device power supply, protective device carries out self check: single-chip microcomputer U reads ADU, ADI, ADN sampled data from the J1 terminal, and make corresponding judgment processing, if voltage, electric current, electric leakage are all normal in normal range (NR), single-chip microcomputer U sending controling instruction OUT1 (low level pulse 60ms) and OUT2 (high level pulse 60ms) are to relay J D1 and JD2, the relay adhesive, the protective device energized, in this process, single-chip microcomputer U puts high level with LED6, power supply indicator flicker 5S, and power supply indicator is long bright behind the power connection; If there is fault in power supply, protective device does not close a floodgate, and fault type is made a decision, and the corresponding failure indicator light is lighted simultaneously;
Under-voltage protection: single-chip microcomputer U reads the ADU sampled data in real time from the J1 terminal; when under-voltage (less than 150V time) takes place supply voltage; the ADU value is less than the overvoltage protection value of setting in the single-chip microcomputer U program; and monitor duration of this value; when time during less than 3 seconds; protective device is failure to actuate; keep the work at present state; when the time surpasses 3 seconds; single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2, and relay disconnects, and cuts off the electricity supply; single-chip microcomputer U puts low level with LED1 simultaneously, and under-voltage indicator light is lighted.Single-chip microcomputer U according to the time of setting (protective device 3 times detection time be 1,2,3 minutes, after this it is 5 minutes, after 31 minutes, be 30 minutes detection time, do not limit number of times) collection ADU data, still be in under-voltage condition if detect these data, single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2, relay keeps disconnecting, when detect the ADU data normal after, single-chip microcomputer U sending controling instruction OUT1 (low level pulse 60ms) and OUT2 (high level pulse 60ms) be to relay J D1 and JD2, relay adhesive, protective device energized;
Overvoltage protection: single-chip microcomputer U reads the ADU sampled data in real time from the J1 terminal; as supply voltage generation overvoltage (greater than 290V time); the ADU value is greater than the overvoltage protection value of setting in the single-chip microcomputer U program; and monitor duration of this value; when time during less than 3 seconds; protective device is failure to actuate; keep the work at present state; when the time surpasses 3 seconds; single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2, and relay disconnects, and cuts off the electricity supply; single-chip microcomputer U puts low level with LED2 simultaneously, and the overvoltage indicator light is lighted.Single-chip microcomputer U according to the time of setting (protective device 3 times detection time be 1,2,3 minutes, after this it is 5 minutes, after 31 minutes, be 30 minutes detection time, do not limit number of times) collection ADU data, still be in overvoltage condition if detect these data, single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2, relay keeps disconnecting, when detect the ADU data normal after, CPU sending controling instruction OUT1 (low level pulse 60ms) and OUT2 (high level pulse 60ms) be to relay J D1 and JD2, relay adhesive, protective device energized;
Earth leakage protective: single-chip microcomputer U reads the ADN sampled data in real time from the J1 terminal; when power supply takes place electric leakage and electrical leakage greater than 30mA; the ADN value is greater than the earth leakage protective value of setting in the single-chip microcomputer U program; single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2; relay disconnects; cut off the electricity supply, single-chip microcomputer U puts low level with LED3 simultaneously, and the electric leakage indicator light is lighted.Single-chip microcomputer U according to the time of setting (protective device 3 times detection time be 1,2,3 minutes, after this it is 5 minutes, after 31 minutes, be 30 minutes detection time, do not limit number of times) collection ADN data, still be in overvoltage condition if detect these data, single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2, relay keeps disconnecting, when detect the ADN data normal after, single-chip microcomputer U sending controling instruction OUT1 (low level pulse 60ms) and OUT2 (high level pulse 60ms) are to relay J D1 and JD2, relay adhesive, protective device energized;
Overload protection: single-chip microcomputer U reads the ADI sampled data in real time from the J1 terminal; when the power source loads electric current excessive; the ADI value is greater than the overload protection value of setting in the single-chip microcomputer U program; single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2; relay disconnects; cut off the electricity supply, single-chip microcomputer U puts low level with LED4 simultaneously, and overload light is lighted.Single-chip microcomputer U according to the time of setting (protective device 3 times detection time be 1,2,3 minutes, after this it is 5 minutes, after 31 minutes, be 30 minutes detection time, do not limit number of times) collection ADI data, still be in overload if detect these data, single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2, relay keeps disconnecting, when detect the ADI data normal after, single-chip microcomputer U sending controling instruction OUT1 (low level pulse 60ms) and OUT2 (high level pulse 60ms) are to relay J D1 and JD2, relay adhesive, protective device energized;
Short-circuit protection: single-chip microcomputer U reads the ADI sampled data in real time from the J1 terminal; when the power source loads electric current excessive; the ADI value is greater than the short-circuit protection value of setting in the single-chip microcomputer U program; single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2; relay disconnects; cut off the electricity supply, single-chip microcomputer U puts low level with LED5 simultaneously, and the short circuit indicator light is lighted.Single-chip microcomputer U according to the time of setting (protective device 3 times detection time be 1; 2; 3 minutes; after this it is 5 minutes; after 31 minutes; be 30 minutes detection time; do not limit number of times) collection ADI data; still be in overload if detect these data; single-chip microcomputer U sending controling instruction OUT1 (high level pulse 60ms) and OUT2 (low level pulse 60ms) are to relay J D1 and JD2; relay keeps disconnecting; when detect the ADI data normal after, single-chip microcomputer U sending controling instruction OUT1 (low level pulse 60ms), and OUT2 (high level pulse 60ms) is to relay J D1 and JD2; the relay adhesive, the protective device energized.
Claims (8)
1. a single-phase intelligent type Protector for using electricity is characterized in that comprising main switch, direct current regulation circuit module, single-chip microcomputer, drive circuit module, mistake/undervoltage detection circuit module, short circuit/overload detection circuit module, electric-leakage detection circuit module and failure indicating circuit module; Described main switch is serially connected on the single phase poaer supply circuit, and mistake/undervoltage detection circuit module, short circuit/overload detection circuit module and electric-leakage detection circuit module three's input is connected single phase poaer supply circuit up-sampling, and output then inserts the single-chip microcomputer collection terminal; An output of described single-chip microcomputer connects main switch through drive circuit module, another output connects the failure indicating circuit module, and described single phase poaer supply circuit power is through the output of direct current regulation circuit module and main switch, single-chip microcomputer, drive circuit module, failure indicating circuit module and each testing circuit module work required voltage are provided.
2. single-phase intelligent type Protector for using electricity according to claim 1, it is characterized in that described direct current regulation circuit module is by transformer T1, bridge rectifier D3, triode U2, three terminal regulator TL1, TL2, U3, resistance R 1～R4, R19, filter capacitor C1～C7, C15 connects to form jointly; Wherein resistance R 1, three terminal regulator TL1, capacitor C 15, triode U2, resistance R 2, resistance R 3 connect to form voltage stabilizing expansion current circuit jointly; R19, TL2, C6 and C7 connect to form sample circuit; The single phase poaer supply circuit expands through T1 step-down, voltage stabilizing exports direct-current working volts VIN on one side after stream, C1 filtering are expanded in the current circuit voltage stabilizing after R4 step-down, C2 filtering, then continue output direct-current working volts VCC after C3 filtering, U3 voltage stabilizing, C4, C5 filtering on one side, VCC then exports DC reference voltage VREF again after sample circuit step-down, voltage stabilizing and filtering; Described main switch is by magnetic latching relay JD1, JD2, and diode D1, D2 and piezo-resistance RV4 are formed by connecting; Described drive circuit module is by optocoupler OP1, OP2, resistance R 5, R6, and R29～R34, triode Q1, Q2, chip for driving U1 is formed by connecting jointly; The main contacts of described JD1, JD2 is serially connected in respectively on the phase line L and center line N of single phase poaer supply circuit, and the main contacts that RV4 is serially connected between L and the N JD1 and JD2 carries out the Lightning Over-voltage protection; It is operating voltage that single-chip microcomputer U gets VCC, one road output control signal OUT1 is connected in series R29 after OP1 isolates, Q1 amplifies, U1 is connected respectively to the auxiliary contact of JD1, JD2 after driving and improving, and constitutes the loop with the coil of JD1, JD2 and the direct-current working volts VIN of access JD1, JD2 respectively; Another road output control signal OUT2 of single-chip microcomputer U is connected in series R20 after OP2 isolates, Q2 amplifies, U1 is connected respectively to another auxiliary contact of JD1, JD2 after driving and improving, and also constitutes the loop with the coil of JD1, JD2 and the direct-current working volts VIN of access JD1, JD2 respectively; D1 and D2 are connected between control signal OUT2 and the VIN respectively as relay protection circuit and between OUT1 and the VIN; VCC inserts OP1 respectively and OP2 one end is they power supplies; VIN connects the emitter of Q1, Q2 respectively through resistance R 32, R31, and VIN connects the base stage of Q1, Q2 respectively through resistance R 33, R34 simultaneously; It is its power supply that VIN also inserts U1 through resistance R 5, R6.
3. single-phase intelligent type Protector for using electricity according to claim 2, it is characterized in that described mistake/undervoltage detection circuit module is by resistance R 7～R12, R14, operational amplifier U4A, U4B, U4C, adjustable resistance RW3, capacitor C 8 and voltage stabilizing didoe TV1 are formed by connecting jointly; The phase line L of single phase poaer supply circuit inserts the U4C negative input ends through resistance R 11 again after R7, R8 step-down, VREF raise level, U4A and follow; and center line N inserts the U4C positive input terminals through resistance R 12 again after R9, R10 step-down, VREF raise level, U4B and follow; two-way voltage is connected in series R14 after the differential amplification of U4C; after output voltage acquired signal ADU is to the collection port of single-chip microcomputer U after the C8 filtering, TV1 voltage-stabilizing protection, described adjustable resistance RW3 is connected between U4C negative input end and the output.
4. single-phase intelligent type Protector for using electricity according to claim 2, it is characterized in that described short circuit/overload detection circuit module is by O type current transformer, adjustable resistance RW1, resistance R 16, R17, R18, capacitor C 9, C10, voltage stabilizing didoe TV2, operational amplifier U4D are formed by connecting jointly; The single phase poaer supply circuit passes O type current transformer; RW1 and C9 all are serially connected between the phase line L and center line N of single phase poaer supply circuit; C9 one termination is gone into the U4D positive input terminal; another termination of C9 VREF; should insert the U4D negative input end through R17 by end simultaneously; this negative input end through R18 connect current signal that U4D output O type current transformer induction obtains behind the RW1 voltage sample by VERF raise level, U4D amplifies back serial connection R16, after after the C10 filtering, TV2 voltage-stabilizing protection output current acquired signal ADI to the collection port of single-chip microcomputer U.
5. single-phase intelligent type Protector for using electricity according to claim 2, it is characterized in that described electric-leakage detection circuit module is by O type zero sequence current mutual inductor, adjustable resistance RW2, resistance R 20～R23, capacitor C 11, C14, voltage stabilizing didoe TV3 and operational amplifier U5A connect and compose jointly; The single phase poaer supply circuit passes O type zero sequence current mutual inductor, RW2 and C11 all are serially connected between the phase line L and center line N of single phase poaer supply circuit, and C11 one end inserts U5A positive input terminal, another termination VREF through R20, should insert the U5A negative input end through R22 by end simultaneously, this negative input end connects the U5A output through R23; The current signal that O type zero sequence current mutual inductor induction obtains behind the RW2 voltage sample by VERF raise level, U5A amplifies back serial connection R21, after after the C14 filtering, TV2 voltage-stabilizing protection output current acquired signal ADN to the collection port of single-chip microcomputer U.
6. single-phase intelligent type Protector for using electricity according to claim 2 is characterized in that described failure indicating circuit module is made of current-limiting resistance R23～R28 and LED 1～LED6; VCC is connected on current-limiting resistance R23～R28 one end, and the other end of current-limiting resistance R23～R28 constitutes each self-loop through the output port of LED1～LED6 access single-chip microcomputer U respectively.
7. single-phase intelligent type Protector for using electricity according to claim 2 is characterized in that described single-chip microcomputer U has the RS485 communication interface.
8. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described single-phase intelligent type Protector for using electricity; it is characterized in that also comprising the anti-lightning strike surge protection module that connects the single phase poaer supply circuit, this anti-lightning strike surge protection module is made of the piezo-resistance and the discharge tube that are serially connected between phase line L and the center line N.
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| CN2009201848370U CN201402965Y (en) | 2009-04-28 | 2009-04-28 | Single-phase intelligent electricity utilization protecting device |
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| CN2009201848370U CN201402965Y (en) | 2009-04-28 | 2009-04-28 | Single-phase intelligent electricity utilization protecting device |
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| CN201402965Y true CN201402965Y (en) | 2010-02-10 |
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| CN102222875A (en) * | 2011-06-14 | 2011-10-19 | 广东志高空调有限公司 | Lightening protection, overcurrent, overvoltage-undervoltage protection circuit and control method |
| CN103368130A (en) * | 2012-03-29 | 2013-10-23 | 苏州工业园区新宏博通讯科技有限公司 | Base station overvoltage and undervoltage protection device |
| CN103795141A (en) * | 2012-10-29 | 2014-05-14 | 苏州工业园区新宏博通讯科技有限公司 | DC reclosing switch |
| CN103795021A (en) * | 2012-10-29 | 2014-05-14 | 苏州工业园区新宏博通讯科技有限公司 | Single-phase reclosing switch |
| CN103855798A (en) * | 2012-11-28 | 2014-06-11 | 苏州工业园区新宏博通讯科技有限公司 | Reclosure |
| CN103872658B (en) * | 2014-04-03 | 2016-08-31 | 湖南星球智能电气科技开发有限公司 | Multifunction self-resetting formula is crossed, under-voltage protector |
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| CN106950458A (en) * | 2017-03-15 | 2017-07-14 | 国家电网公司 | The short circuit of low pressure uniline and disconnection detection device |
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| CN109274063A (en) * | 2018-10-25 | 2019-01-25 | 成都标定科技有限责任公司 | A kind of overvoltage/undervoltage protection type LED streetlamp power source lightning protection device |
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| CN110958055A (en) * | 2019-12-09 | 2020-04-03 | 哈尔滨新中新电子股份有限公司 | RS485 communication isolation protection circuit with three-layer protection |
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| CN112798981A (en) * | 2020-12-29 | 2021-05-14 | 江苏航天大为科技股份有限公司 | Road traffic system with alternating current monitoring and protecting functions |
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| CN102222875A (en) * | 2011-06-14 | 2011-10-19 | 广东志高空调有限公司 | Lightening protection, overcurrent, overvoltage-undervoltage protection circuit and control method |
| CN103368130A (en) * | 2012-03-29 | 2013-10-23 | 苏州工业园区新宏博通讯科技有限公司 | Base station overvoltage and undervoltage protection device |
| CN103795141A (en) * | 2012-10-29 | 2014-05-14 | 苏州工业园区新宏博通讯科技有限公司 | DC reclosing switch |
| CN103795021A (en) * | 2012-10-29 | 2014-05-14 | 苏州工业园区新宏博通讯科技有限公司 | Single-phase reclosing switch |
| CN103855798A (en) * | 2012-11-28 | 2014-06-11 | 苏州工业园区新宏博通讯科技有限公司 | Reclosure |
| CN106415968B (en) * | 2013-12-04 | 2019-03-08 | 伊顿工业(荷兰)有限公司 | Half voltage dependent form breaker |
| CN106415968A (en) * | 2013-12-04 | 2017-02-15 | 伊顿工业(荷兰)有限公司 | Semi voltage dependent circuit breaker |
| US10355471B2 (en) | 2013-12-04 | 2019-07-16 | Eaton Intelligent Power Limited | Semi voltage dependent circuit breaker with earth fault and overcurrent protection |
| CN103872658B (en) * | 2014-04-03 | 2016-08-31 | 湖南星球智能电气科技开发有限公司 | Multifunction self-resetting formula is crossed, under-voltage protector |
| CN106950458A (en) * | 2017-03-15 | 2017-07-14 | 国家电网公司 | The short circuit of low pressure uniline and disconnection detection device |
| CN107393164A (en) * | 2017-07-10 | 2017-11-24 | 天津工业大学 | Underground charging pile intelligent management system |
| CN109274063A (en) * | 2018-10-25 | 2019-01-25 | 成都标定科技有限责任公司 | A kind of overvoltage/undervoltage protection type LED streetlamp power source lightning protection device |
| CN109254223A (en) * | 2018-11-07 | 2019-01-22 | 深圳市众祥安全科技有限公司 | Leak electricity short-circuit detection method, open circuit protection equipment, monitoring center, system |
| CN109962446A (en) * | 2019-04-28 | 2019-07-02 | 西南科技大学城市学院 | Safety utilization of electric power intelligent protection device |
| WO2021052205A1 (en) * | 2019-09-17 | 2021-03-25 | 青岛海尔空调电子有限公司 | Surge absorption circuit for single-phase air conditioning system |
| CN110958055A (en) * | 2019-12-09 | 2020-04-03 | 哈尔滨新中新电子股份有限公司 | RS485 communication isolation protection circuit with three-layer protection |
| CN110958055B (en) * | 2019-12-09 | 2022-11-15 | 哈尔滨新中新电子股份有限公司 | RS485 communication isolation protection circuit with three-layer protection |
| CN112798981A (en) * | 2020-12-29 | 2021-05-14 | 江苏航天大为科技股份有限公司 | Road traffic system with alternating current monitoring and protecting functions |
| CN114245523A (en) * | 2021-12-27 | 2022-03-25 | 江苏友润微电子有限公司 | Constant current driving system for LED illumination |
| CN117039708A (en) * | 2023-10-07 | 2023-11-10 | 江苏安靠智能输电工程科技股份有限公司 | Novel all-insulated handcart type switch cabinet |
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