CN205544213U - Disconnected zero of undervoltage protection ware, open -phase protection circuit are crossed from double entry to three -phase four -wire - Google Patents
Disconnected zero of undervoltage protection ware, open -phase protection circuit are crossed from double entry to three -phase four -wire Download PDFInfo
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- CN205544213U CN205544213U CN201620309336.0U CN201620309336U CN205544213U CN 205544213 U CN205544213 U CN 205544213U CN 201620309336 U CN201620309336 U CN 201620309336U CN 205544213 U CN205544213 U CN 205544213U
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Abstract
The utility model relates to a disconnected zero of undervoltage protection ware, open -phase protection circuit are crossed from double entry to three -phase four -wire, its voltage acquisition circuit, signal processing and control circuit, actuating mechanism drive circuit who includes electricity connection in proper order, voltage acquisition circuit and power input three -phase ABC are connected, be equipped with power supply circuit, power supply circuit is connected with signal processing and control circuit and actuating mechanism drive circuit electricity respectively, power supply circuit includes electric capacity C1 and steady voltage chip U2, steady voltage chip U2's input vin is connected with 24V DC power supply, and output vout and 5V DC power supply are connected, shunt capacitance C1 between input vin and ground GND. Through forming an electric return circuit between electric capacity C1, steady voltage chip U2 and the ground GND, guarantee when disconnected zero, the loss of phase of protector, utilize electric capacity C1's afterflow ability, provide of short duration electric energy to support the action of control circuit and actuating mechanism drive circuit, realize the disconnected zero of protector, open -phase protection.
Description
Technical field
This utility model relates to a kind of electric equipment, particularly to a kind of three-phase and four-line Self-recover overvoltage-undervoltage protection circuit.
Background technology
Along with living standards of the people improve, user is to Electrical Safety pay attention to day by day.Self-recovering type overvoltage-undervoltage protector (hereinafter referred to as protector) is applicable to single-phase AC voltage 220V, frequency 50Hz and three-phase and four-line alternating voltage 400V, the load of frequency 50Hz, as protection electrical equipment to electrical equipment during circuit generation overvoltage/undervoltage fault.
Main flow three-phase and four-line protector is in use in the market, the error connection of product, disconnected phase, (N) off zero is protected existing defects, brings huge hidden danger to electricity consumption, is unfavorable for that product promotion and user use.
Utility model content
For above-mentioned technical deficiency and use inconvenience, a kind of three-phase and four-line Self-recover overvoltage-undervoltage protector of ad hoc meter is off zero, open-phase protection circuit, it is possible to disconnected phase and line off zero (N) are effectively protected, simultaneously to preventing user's error connection and missing line.
This utility model be the technical scheme is that, and a kind of three-phase and four-line Self-recover overvoltage-undervoltage protector is off zero, open-phase protection circuit; it includes that voltage collection circuit, signal processing and control circuit, the actuator drive circuit being sequentially connected electrically, described voltage collection circuit are connected with power supply input three-phase A/B/C；Being provided with power circuit, described power circuit electrically connects with signal processing and control circuit and actuator drive circuit respectively；Described power circuit includes that electric capacity C1 and voltage stabilizing chip U2, input Vin and the 24V DC source of described voltage stabilizing chip U2 are connected, and output end vo ut and 5V DC source is connected, shunt capacitance C1 between input Vin and ground GND.
It is provided with electric capacity C2, described electric capacity C2 to be connected in parallel between output end vo ut and ground GND.
Described electric capacity C1/ C2 is polar capacitor, and the positive pole of described electric capacity C1 is connected with input Vin, and negative pole is connected with ground GND；The positive pole of described electric capacity C2 is connected with output end vo ut, and negative pole is connected with ground GND.
Described power circuit includes audion Q1, resistance R19 and/or resistance R20, the colelctor electrode of described audion Q1 is connected with power supply input three-phase A/B/C, is connected with base stage through R19 and/or resistance R20 successively respectively, base stage is connected with ground GND, and emitter stage is connected with the input Vin of voltage stabilizing chip U2.
Described power circuit includes resistance R1/R2/R3/R4/R5/R6/R7/R8/R9, diode D1/D2/D3, being sequentially connected in series resistance R1/R2/R3 and diode D1 between power supply input A phase and the colelctor electrode of audion Q1, the negative pole of described diode D1 is connected with the colelctor electrode of audion Q1；Being sequentially connected in series resistance R4/R5/R6 and diode D2 between power supply input B phase and the colelctor electrode of audion Q1, the negative pole of described diode D2 is connected with the colelctor electrode of audion Q1；Being sequentially connected in series resistance R7/R8/R9 and diode D3 between power supply input C phase and the colelctor electrode of audion Q1, the negative pole of described diode D3 is connected with the colelctor electrode of audion Q1.
Being provided with Transient Suppression Diode TVS and stabilivolt DZ, the negative pole of described Transient Suppression Diode TVS is connected with the colelctor electrode of audion Q1, and positive pole is connected with ground GND, and the negative pole of described stabilivolt DZ is connected with the base stage of audion Q1, and positive pole is connected with ground GND.
Being provided with diode D7, the negative pole of described diode D7 is connected with power supply input zero line N, and positive pole is connected with ground GND.
Described voltage collection circuit includes resistance R10/R11/R12/R13/R14/R15/R16/R17/R18, diode D4/D5/D6, electric capacity C3/C4/C5, described resistance R10/R11/R12 connects, the negative pole of diode D4 is connected with resistance R10, positive pole is connected with power supply input A, and described electric capacity C3 is also listed in resistance R12 two ends, described resistance R12 ground connection GND；Described resistance R13/R14/R15 connects, and the negative pole of diode D5 is connected with resistance R11, and positive pole is connected with power supply input B, and described electric capacity C4 is also listed in resistance R15 two ends, described resistance R15 ground connection GND；Described resistance R16/R17/R18 connects, and the negative pole of diode D6 is connected with resistance R16, and positive pole is connected with power supply input C, and described electric capacity C5 is also listed in resistance R18 two ends, described resistance R18 ground connection GND.
The beneficial effects of the utility model are: this utility model is by forming an electric loop between electric capacity C1, voltage stabilizing chip U2 and ground GND; ensure phase time off zero at protector, disconnected; utilize the afterflow ability of electric capacity C1; of short duration electric energy is provided; with support and control circuit and actuator drive circuit action, it is achieved protector is off zero, open-phase protection.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model embodiment is described further:
As it can be seen, a kind of three-phase and four-line Self-recover overvoltage-undervoltage protection circuit, it includes that voltage collection circuit, signal processing and control circuit, the actuator drive circuit being sequentially connected electrically, described voltage collection circuit are connected with power supply input three-phase A/B/C；Being provided with power circuit, described power circuit electrically connects with signal processing and control circuit and actuator drive circuit respectively；Described power circuit includes that electric capacity C1 and voltage stabilizing chip U2, input Vin and the 24V DC source of described voltage stabilizing chip U2 are connected, and output end vo ut and 5V DC source is connected, shunt capacitance C1 between input Vin and ground GND.By forming an electric loop between electric capacity C1, voltage stabilizing chip U2 and ground GND, it is ensured that time off zero, utilize the afterflow ability of electric capacity C1, it is provided that of short duration electric energy, with support and control circuit and actuator drive circuit action, it is achieved protector is off zero, open-phase protection.
It is provided with electric capacity C2, described electric capacity C2 to be connected in parallel between output end vo ut and ground GND, one electric capacity C2 of many increases, in order to auxiliary capacitor C1, can preferably provide afterflow ability.
Described electric capacity C1/ C2 is polar capacitor, and the positive pole of described electric capacity C1 is connected with input Vin, and negative pole is connected with ground GND；The positive pole of described electric capacity C2 is connected with output end vo ut, negative pole is connected with ground GND, utilize the Large Copacity of polar capacitor, can be when normal circuit operation, storing more electric energy, in order to when fault off zero, electric capacity C1/ C2 can provide electric current for power circuit more enduringly, so that voltage stabilizing chip U2 can stably export 5V DC voltage and 24V DC voltage, come the chip U1 for control circuit and actuator drive circuitry.
Described power circuit includes audion Q1, resistance R19 and/or resistance R20, the colelctor electrode of described audion Q1 is connected with power supply input three-phase A/B/C, is connected with base stage through R19 and/or resistance R20 successively respectively, base stage is connected with ground GND, and emitter stage is connected with the input Vin of voltage stabilizing chip U2.Colelctor electrode and base stage at audion Q1 directly arrange resistance R19/R20, for providing conducting electric current for base stage, and carry out blood pressure lowering with resistance R19/R20, it is ensured that base voltage is less than collector voltage.
Described power circuit includes resistance R1/R2/R3/R4/R5/R6/R7/R8/R9, diode D1/D2/D3, it is sequentially connected in series resistance R1/R2/R3 and diode D1 between power supply input A phase and the colelctor electrode of audion Q1, the negative pole of described diode D1 is connected with the colelctor electrode of audion Q1, power supply input A phase is through resistance R1/R2/R3 blood pressure lowering, through diode D1 rectification；Being sequentially connected in series resistance R4/R5/R6 and diode D2 between power supply input B phase and the colelctor electrode of audion Q1, the negative pole of described diode D2 is connected with the colelctor electrode of audion Q1, and power supply input B phase is through resistance R4/R5/R6 blood pressure lowering, through diode D2 rectification；Being sequentially connected in series resistance R7/R8/R9 and diode D3 between power supply input C phase and the colelctor electrode of audion Q1, the negative pole of described diode D3 is connected with the colelctor electrode of audion Q1, and power supply input C phase is through resistance R7/R8/R9 blood pressure lowering, through diode D3 rectification.
Being provided with Transient Suppression Diode TVS and stabilivolt DZ, the negative pole of described Transient Suppression Diode TVS is connected with the colelctor electrode of audion Q1, and positive pole is connected with ground GND, and the negative pole of described stabilivolt DZ is connected with the base stage of audion Q1, and positive pole is connected with ground GND.
Being provided with diode D7, the negative pole of described diode D7 is connected with power supply input zero line N, and positive pole is connected with ground GND, and when preventing arbitrary phase and zero line N misconnection in input voltage A/B/C phase, voltage is excessive.
Resistance R10/R11/R12 connects, and the negative pole of diode D4 is connected with resistance R10, and positive pole is connected with power supply input A, and electric capacity C3 is also listed in resistance R12 two ends, resistance R12 ground connection GND；Resistance R13/R14/R15 connects, and the negative pole of diode D5 is connected with resistance R11, and positive pole is connected with power supply input B, and electric capacity C4 is also listed in resistance R15 two ends, resistance R15 ground connection GND；Resistance R16/R17/R18 connects, the negative pole of diode D6 is connected with resistance R16, positive pole is connected with power supply input C, and described electric capacity C5 is also listed in resistance R18 two ends, described resistance R18 ground connection GND, described diode D4/D5/D6 is used as rectification, described electric capacity C3/C4/C5 is used as filtering, resistance R10/R11/R12, resistance/R13/R14/R15, resistance R16/R17/R18 is used separately as the dividing potential drop of power supply input A/B/C phase, and output node AN1/AN2/AN3 provides dividing potential drop to signal processing and control circuit.
Power circuit blood pressure lowering uses resistance blood pressure lowering, and its advantage has:
1) purely resistive blood pressure lowering, does not affect the power factor of power system；
2) antisurge impact is strong；
3) take product space little and solve the pressure problem of capacitance decompression.
Voltage collection circuit uses three-phase to sample respectively, and its advantage has:
1) the analog precision of voltage acquisition ratio of precision is high；
2) A phase, B phase and the voltage condition of C phase can be gathered successively.
Described actuator drive circuit includes relay K 1/K2/K3; described relay K 1 is connected with power supply input A; described relay K 2 is connected with power supply input B, and described relay K 3 is connected with power supply input C, for controlling the misconnection protection of power supply input A/B/C phase respectively.
Protection explanation:
1) open-phase protection: assuming that power supply input A phase disconnects, other are connected normally, and its power circuit is powered and appointed the most normally, but now voltage collection circuit gathers power supply input A phase voltage is zero, then and control circuit is judged as that under-voltage condition protector does not closes a floodgate；Disconnecting other phases, protector does not closes a floodgate.
2) protection off zero to (N): when powering on, zero line (N) disconnects, and whole power circuit does not works and cannot close a floodgate；During protector work, zero line (N) disconnects, and owing to the electric capacity C1/C2 storage electric energy short time can power to control circuit, now voltage collection circuit gathers each phase voltage is under-voltage condition then protector separating brake, plays line off zero (N) defencive function.
3) misconnection protection: assume A phase and zero line (N) reversal connection of protector; now power circuit is by normally providing power supply after B, C phase half-wave rectification; but there is B phase and C phase overvoltage, A phase under-voltage condition in the circuit that voltage collection circuit collects; now protector does not closes a floodgate, and plays misconnection defencive function；In like manner B phase and zero line (N) reversal connection, now power circuit is by normally providing power supply after A, C phase half-wave rectification, but A phase and C phase overvoltage, B phase under-voltage condition occurs in the circuit that voltage collection circuit collects, and now protector does not closes a floodgate, and plays misconnection defencive function；In like manner phase C phase and zero line (N) reversal connection, now power circuit is by normally providing power supply after A, B phase half-wave rectification, but A phase and B phase overvoltage, C phase under-voltage condition occurs in the circuit that voltage collection circuit collects, and now protector does not closes a floodgate, and plays misconnection defencive function.
Being only preferred implementation of the present utility model above in association with the embodiment described by accompanying drawing, and not restriction to protection domain of the present utility model, any improvement done based on this utility model spirit all ought to be within this utility model protection domain.
Claims (8)
1. a three-phase and four-line Self-recover overvoltage-undervoltage protector is off zero, open-phase protection circuit; it is characterized in that: it includes that voltage collection circuit, signal processing and control circuit, the actuator drive circuit being sequentially connected electrically, described voltage collection circuit are connected with power supply input three-phase A/B/C；Being provided with power circuit, described power circuit electrically connects with signal processing and control circuit and actuator drive circuit respectively；Described power circuit includes that electric capacity C1 and voltage stabilizing chip U2, input Vin and the 24V DC source of described voltage stabilizing chip U2 are connected, and output end vo ut and 5V DC source is connected, shunt capacitance C1 between input Vin and ground GND.
A kind of three-phase and four-line Self-recover overvoltage-undervoltage protector the most according to claim 1 is off zero, open-phase protection circuit, it is characterised in that: it is provided with electric capacity C2, described electric capacity C2 and is connected in parallel between output end vo ut and ground GND.
A kind of three-phase and four-line Self-recover overvoltage-undervoltage protector the most according to claim 2 is off zero, open-phase protection circuit, it is characterised in that: described electric capacity C1/ C2 is polar capacitor, and the positive pole of described electric capacity C1 is connected with input Vin, and negative pole is connected with ground GND；The positive pole of described electric capacity C2 is connected with output end vo ut, and negative pole is connected with ground GND.
A kind of three-phase and four-line Self-recover overvoltage-undervoltage protector the most according to claim 1 is off zero, open-phase protection circuit; it is characterized in that: described power circuit includes audion Q1, resistance R19 and/or resistance R20; the colelctor electrode of described audion Q1 is connected with power supply input three-phase A/B/C, is connected with base stage through resistance R19 and/or resistance R20 successively respectively; base stage is connected with ground GND, and emitter stage is connected with the input Vin of voltage stabilizing chip U2.
A kind of three-phase and four-line Self-recover overvoltage-undervoltage protector the most according to claim 1 is off zero, open-phase protection circuit; it is characterized in that: described power circuit includes resistance R1/R2/R3/R4/R5/R6/R7/R8/R9; diode D1/D2/D3; being sequentially connected in series resistance R1/R2/R3 and diode D1 between power supply input A phase and the colelctor electrode of audion Q1, the negative pole of described diode D1 is connected with the colelctor electrode of audion Q1；Being sequentially connected in series resistance R4/R5/R6 and diode D2 between power supply input B phase and the colelctor electrode of audion Q1, the negative pole of described diode D2 is connected with the colelctor electrode of audion Q1；Being sequentially connected in series resistance R7/R8/R9 and diode D3 between power supply input C phase and the colelctor electrode of audion Q1, the negative pole of described diode D3 is connected with the colelctor electrode of audion Q1.
A kind of three-phase and four-line Self-recover overvoltage-undervoltage protector the most according to claim 5 is off zero, open-phase protection circuit; it is characterized in that: be provided with Transient Suppression Diode TVS and stabilivolt DZ; the negative pole of described Transient Suppression Diode TVS is connected with the colelctor electrode of audion Q1; positive pole is connected with ground GND; the negative pole of described stabilivolt DZ is connected with the base stage of audion Q1, and positive pole is connected with ground GND.
A kind of three-phase and four-line Self-recover overvoltage-undervoltage protector the most according to claim 5 is off zero, open-phase protection circuit, it is characterised in that: being provided with diode D7, the negative pole of described diode D7 is connected with power supply input zero line N, and positive pole is connected with ground GND.
A kind of three-phase and four-line Self-recover overvoltage-undervoltage protector the most according to claim 1 is off zero, open-phase protection circuit; it is characterized in that: described voltage collection circuit includes resistance R10/R11/R12/R13/R14/R15/R16/R17/R18; diode D4/D5/D6; electric capacity C3/C4/C5; described resistance R10/R11/R12 connects, and the negative pole of diode D4 is connected with resistance R10, and positive pole is connected with power supply input A; described electric capacity C3 is also listed in resistance R12 two ends, described resistance R12 ground connection GND；Described resistance R13/R14/R15 connects, and the negative pole of diode D5 is connected with resistance R11, and positive pole is connected with power supply input B, and described electric capacity C4 is also listed in resistance R15 two ends, described resistance R15 ground connection GND；Described resistance R16/R17/R18 connects, and the negative pole of diode D6 is connected with resistance R16, and positive pole is connected with power supply input C, and described electric capacity C5 is also listed in resistance R18 two ends, described resistance R18 ground connection GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620309336.0U CN205544213U (en) | 2016-04-14 | 2016-04-14 | Disconnected zero of undervoltage protection ware, open -phase protection circuit are crossed from double entry to three -phase four -wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620309336.0U CN205544213U (en) | 2016-04-14 | 2016-04-14 | Disconnected zero of undervoltage protection ware, open -phase protection circuit are crossed from double entry to three -phase four -wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544213U true CN205544213U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620309336.0U Expired - Fee Related CN205544213U (en) | 2016-04-14 | 2016-04-14 | Disconnected zero of undervoltage protection ware, open -phase protection circuit are crossed from double entry to three -phase four -wire |
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| Country | Link |
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| CN (1) | CN205544213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884777A (en) * | 2021-09-22 | 2022-01-04 | 深圳拓邦股份有限公司 | Open-phase detection method, circuit and device of three-phase alternating-current power supply and electrical equipment |
-
2016
- 2016-04-14 CN CN201620309336.0U patent/CN205544213U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884777A (en) * | 2021-09-22 | 2022-01-04 | 深圳拓邦股份有限公司 | Open-phase detection method, circuit and device of three-phase alternating-current power supply and electrical equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20180414 |