CN214100836U - Four-pole circuit breaker integrating leakage, phase loss and undervoltage protection - Google Patents
Four-pole circuit breaker integrating leakage, phase loss and undervoltage protection Download PDFInfo
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- CN214100836U CN214100836U CN202023121740.0U CN202023121740U CN214100836U CN 214100836 U CN214100836 U CN 214100836U CN 202023121740 U CN202023121740 U CN 202023121740U CN 214100836 U CN214100836 U CN 214100836U
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Abstract
The utility model discloses a quadrupole circuit breaker with current leakage, phase loss and under-voltage protection, which comprises a three-phase sampling module, a rectification module and a photoelectric coupler, wherein the three-phase sampling module, the rectification module, an amplification arithmetic device and a release execution module are connected with the three-phase sampling module, the rectification module, the amplification arithmetic device and the release execution module; the first pin of the photoelectric coupler is connected with the three-phase sampling module and the release execution module, the second pin of the photoelectric coupler is connected with the three-phase sampling module, the third pin of the photoelectric coupler is connected with the eighth pin of the amplification arithmetic unit, and the fourth pin of the photoelectric coupler is connected with the third pin of the rectification module, the leakage detection module and the amplification arithmetic unit and the circuit ground. Under-voltage protection and open-phase protection are realized simultaneously through the photoelectric coupler, and when under-voltage or open-phase occurs, the photoelectric coupler is conducted, and after comparison of the amplifying arithmetic unit, a tripping signal is sent to the tripping device execution module.
Description
Technical Field
The utility model relates to a circuit breaker field specifically is a quadrupole circuit breaker of collection electric leakage, lack of phase, undervoltage protection.
Background
The existing four-pole circuit breaker usually has only the functions of leakage, overload and short-circuit protection, and does not have the functions of phase failure and undervoltage protection. In a three-phase line four-wire system power grid, all loads are connected in phase, when a certain phase of a power supply end generates a phase-lack fault or an undervoltage fault, the four-pole circuit breaker cannot act and cannot play a role in protection, so that the existing leakage circuit breaker has a single function and cannot meet the requirements of practical application.
Disclosure of Invention
The utility model aims at: in order to overcome the defects of the prior art, the utility model provides a four-pole circuit breaker with the functions of electric leakage collection, phase loss and under-voltage protection.
The technical scheme of the utility model: the leakage detection device comprises a leakage detection module, a leakage zero sequence transformer, a release execution module and a three-phase four-wire connecting end, wherein the leakage zero sequence transformer and the release execution module are connected with a leakage signal input end of the leakage detection module respectively; the first pin of the photoelectric coupler is connected with the three-phase sampling module and the release execution module, the second pin of the photoelectric coupler is connected with the three-phase sampling module, the third pin of the photoelectric coupler is connected with the rectifying module, the electric leakage detection module, the third pin of the amplification arithmetic unit and the circuit ground, and the fourth pin of the photoelectric coupler is connected with the eighth pin of the amplification arithmetic unit.
The utility model discloses a further setting: the first pin of the photoelectric coupler is connected with a voltage stabilizing diode W1 and a resistor R8 in series, the anode and the cathode of the voltage stabilizing diode W1 are respectively connected with the first pin of the photoelectric coupler and one end of the resistor R8, the three-phase sampling module is connected with the common end of the voltage stabilizing diode W1 and the resistor R8, and the other end of the resistor R8 is connected with the release execution module and the electric leakage detection module.
The utility model discloses a further setting again: the fourth pin of the photoelectric coupler is connected with one end of a resistor R4 and the anode of a diode D, the other end of the resistor R4 is connected with the leakage detection module, the cathode of the diode D is connected with one end of a resistor R5, one end of a capacitor C11 and the cathode of a voltage stabilizing diode W2, the anode of the voltage stabilizing diode W2 is connected with the anode of a diode D2, the cathode of the diode D2 is connected with the fourth pin of the amplification arithmetic unit, and the third pin of the photoelectric coupler is further connected with the other end of the resistor R5 and the other end of the capacitor C11.
The utility model discloses a still further set up: the rectifying module comprises a rectifying diode ZL1, a rectifying diode ZL2, a rectifying diode ZL3, a rectifying diode ZL4, a rectifying diode ZL5 and a rectifying diode ZL6, wherein the phase A of the three-phase four-wire connecting end is connected between the rectifying diode ZL1 and the rectifying diode ZL2, the phase B of the three-phase four-wire connecting end is connected between the rectifying diode ZL5 and the rectifying diode ZL6, and the phase C of the three-phase four-wire connecting end is connected between the rectifying diode ZL3 and the rectifying diode ZL 4.
The utility model discloses a still further set up: the three-phase sampling module comprises a piezoresistor YM1, a piezoresistor YM2, a piezoresistor YM3, a variable resistor RP and a capacitor C10, wherein the piezoresistor YM1 is connected between the N phase and the A phase of a three-phase four-wire connecting end, the piezoresistor YM2 is connected between the N phase and the B phase of the three-phase four-wire connecting end, and the piezoresistor YM3 is connected between the N phase and the C phase of the three-phase four-wire connecting end; the N phase of the three-phase four-wire connecting end is also connected with a second pin of the photoelectric coupler, the variable end of the variable resistor RP is connected with the N phase of the three-phase four-wire connecting end, one fixed end of the variable resistor RP is connected with a common end between the N phase of the three-phase four-wire connecting end and the second pin of the photoelectric coupler, and the other fixed end of the variable resistor RP is connected with the common end of the voltage stabilizing diode W1 and the resistor R8; one end of the capacitor C10 is connected to the common end between the three-phase four-wire connection end N phase and the second pin of the photoelectric coupler, and the other end is connected to the common end of the voltage stabilizing diode W1 and the resistor R8.
By adopting the technical scheme, under-voltage protection and open-phase protection are simultaneously realized through the photoelectric coupler, the three-phase sampling module detects three-phase alternating current input, the three-phase alternating current input is rectified by the rectifying module and then transmitted to the photoelectric coupler, when under-voltage or open-phase occurs, the photoelectric coupler is conducted, and a tripping signal is sent to the tripping device execution module after comparison of the amplifying arithmetic unit. Therefore, the condition of three-phase voltage can be monitored at any time, the undervoltage and the three-phase open-phase are detected, the circuit breaker is protected and detected, the protection of fault circuits such as leakage, open-phase and undervoltage is integrated, the phenomenon that three-phase electric equipment is damaged is avoided, and the function of the circuit breaker is improved.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment of the present invention;
the device comprises a leakage detection module 1, a release execution module 2, a leakage zero sequence transformer 11, an amplification arithmetic unit 12, a three-phase sampling module 3, a rectification module 4 and a photoelectric coupler 5.
Detailed Description
As shown in fig. 1, the four-pole circuit breaker integrating leakage, open-phase and under-voltage protection comprises a leakage detection module 1, a leakage zero-sequence transformer 11 connected to a leakage signal input terminal of the leakage detection module 1, a release execution module 2 and a three-phase four-wire connection terminal, wherein the leakage zero-sequence transformer 11 and the release execution module 2 are respectively connected to an input terminal of the leakage detection module 1, on the output end, the electric leakage detection module 1 is provided with an amplification arithmetic unit 12, the tripper execution module 2 controls the on-off of three-phase phases, and the electric leakage detection module also comprises a three-phase sampling module 3, a rectification module 4 and a photoelectric coupler 5 which are connected with a three-phase four-wire connecting end, wherein the photoelectric coupler 5 is respectively connected with the three-phase sampling module 3, the rectification module 4, the amplification arithmetic unit 12 and the tripper execution module 2, and the rectification module 4 is respectively connected with the three-phase four-wire connecting end and the tripper execution module 2; a first pin of the photoelectric coupler 5 is connected with the three-phase sampling module 3 and the release executing module 2, a second pin of the photoelectric coupler 5 is connected with the three-phase sampling module 3, a third pin of the photoelectric coupler 5 is connected with the rectifying module 4, the leakage detecting module 1, a third pin of the amplifying arithmetic unit 12 and a circuit ground, and a fourth pin of the photoelectric coupler 5 is connected with an eighth pin of the amplifying arithmetic unit 12. The first pin of the photoelectric coupler 5 is connected in series with a voltage stabilizing diode W1 and a resistor R8 in sequence, the anode and the cathode of the voltage stabilizing diode W1 are respectively connected with the first pin of the photoelectric coupler 5 and one end of the resistor R8, the three-phase sampling module 3 is connected with the common end of the voltage stabilizing diode W1 and the resistor R8, and the other end of the resistor R8 is connected with the release execution module 2 and the leakage detection module 1. The fourth pin of the photocoupler 5 is connected with one end of a resistor R4 and the anode of a diode D, the other end of the resistor R4 is connected with the leakage detection module 1, the cathode of the diode D is connected with one end of a resistor R5, one end of a capacitor C11 and the cathode of a voltage stabilizing diode W2, the anode of a voltage stabilizing diode W2 is connected with the anode of a diode D2, the cathode of a diode D2 is connected with the fourth pin of the amplification arithmetic unit 12, and the third pin of the photocoupler 5 is further connected with the other end of the resistor R5 and the other end of the capacitor C11.
The rectifier module 4 comprises a rectifier diode ZL1, a rectifier diode ZL2, a rectifier diode ZL3, a rectifier diode ZL4, a rectifier diode ZL5 and a rectifier diode ZL6, wherein the phase a of the three-phase four-wire connection end is connected between the rectifier diode ZL1 and the rectifier diode ZL2, the phase B of the three-phase four-wire connection end is connected between the rectifier diode ZL5 and the rectifier diode ZL6, and the phase C of the three-phase four-wire connection end is connected between the rectifier diode ZL3 and the rectifier diode ZL 4. The A phase, the B phase and the C phase of the alternating current input voltage at the three-phase four-wire connecting end are rectified into direct current output after passing through the rectifying module 4.
The three-phase sampling module 3 comprises a piezoresistor YM1, a piezoresistor YM2, a piezoresistor YM3, a variable resistor RP and a capacitor C10, wherein the piezoresistor YM1 is connected between the N phase and the A phase of the three-phase four-wire connecting end, the piezoresistor YM2 is connected between the N phase and the B phase of the three-phase four-wire connecting end, and the piezoresistor YM3 is connected between the N phase and the C phase of the three-phase four-wire connecting end; the N phase of the three-phase four-wire connecting end is also connected with a second pin of the photoelectric coupler 5, the variable end of the variable resistor RP is connected with the N phase of the three-phase four-wire connecting end, one fixed end of the variable resistor RP is connected with a common end between the N phase of the three-phase four-wire connecting end and the second pin of the photoelectric coupler 5, and the other fixed end of the variable resistor RP is connected with the common end of the voltage stabilizing diode W1 and the resistor R8; one end of the capacitor C10 is connected to the common terminal between the three-phase four-wire connection terminal N phase and the second pin of the photocoupler 5, and the other end is connected to the common terminal of the zener diode W1 and the resistor R8.
After the A phase, the B phase and the C phase of the three-phase alternating current to be detected are rectified by a three-phase full bridge consisting of a rectifier diode ZL1 to a rectifier diode ZL6, direct current pulsating voltage input is obtained, sampling is carried out by a three-phase sampling module, the input voltage of the direct current pulsating voltage input is higher than the voltage of a voltage stabilizing diode W1, the photoelectric coupler 5 can work, and otherwise, the photoelectric coupler 5 cannot work. Therefore, when the undervoltage condition occurs, the zener diode W1 cannot be broken down, the photoelectric coupler 5 does not work, the third pin and the fourth pin of the photoelectric coupler 5 are conducted, the voltage at the reverse end is higher than the voltage at the in-phase end through the comparison of the amplification arithmetic unit 12, the release execution module 2 sends out a release signal, and the circuit performs the undervoltage protection function.
When the three-phase four-wire connection end is in phase loss, the phase change of the A phase, the phase change of the B phase and the phase change of the C phase of three-phase alternating current are single-phase input, the waveform after rectification is single-phase rectification waveform, the valley value of the single-phase rectification waveform is very low and can reach as low as 0V, therefore, the voltage stabilizing diode W1 is in a non-conduction state for a period of time, and therefore, the photoelectric coupler 5 is in a pulse conduction state, and compared by the amplifying arithmetic unit 12, the tripper execution module 2 sends a tripping signal, and the circuit performs the phase loss protection function.
Claims (5)
1. The utility model provides an electric leakage, lack looks, undervoltage protection's quadrupole circuit breaker, including electric leakage detection module, the electric leakage zero sequence transformer that links to each other with electric leakage detection module's leakage current signal input end, release execution module and three-phase four-wire link, electric leakage zero sequence transformer, release execution module are connected respectively on electric leakage detection module's input, output, electric leakage detection module is provided with the arithmetic unit that amplifies, its characterized in that: the photoelectric coupler is respectively connected with the three-phase sampling module, the rectifying module, the amplifying arithmetic unit and the tripper executing module, and the rectifying module is respectively connected with the three-phase four-wire connecting end and the tripper executing module; the first pin of the photoelectric coupler is connected with the three-phase sampling module and the release execution module, the second pin of the photoelectric coupler is connected with the three-phase sampling module, the third pin of the photoelectric coupler is connected with the rectifying module, the electric leakage detection module, the third pin of the amplification arithmetic unit and the circuit ground, and the fourth pin of the photoelectric coupler is connected with the eighth pin of the amplification arithmetic unit.
2. A four-pole circuit breaker with current leakage, phase loss and under-voltage protection according to claim 1, characterized in that: the first pin of the photoelectric coupler is connected with a voltage stabilizing diode W1 and a resistor R8 in series, the anode and the cathode of the voltage stabilizing diode W1 are respectively connected with the first pin of the photoelectric coupler and one end of the resistor R8, the three-phase sampling module is connected with the common end of the voltage stabilizing diode W1 and the resistor R8, and the other end of the resistor R8 is connected with the release execution module and the leakage detection module.
3. A four-pole circuit breaker with current leakage, phase loss and under-voltage protection according to claim 1, characterized in that: the fourth pin of the photoelectric coupler is connected with one end of a resistor R4 and the anode of a diode D, the other end of the resistor R4 is connected with a leakage detection module, the cathode of the diode D is connected with one end of a resistor R5, one end of a capacitor C11 and the cathode of a voltage stabilizing diode W2, the anode of the voltage stabilizing diode W2 is connected with the anode of a diode D2, the cathode of the diode D2 is connected with the fourth pin of the amplification arithmetic unit, and the third pin of the photoelectric coupler is further connected with the other end of the resistor R5 and the other end of the capacitor C11.
4. A four-pole circuit breaker with current leakage, phase loss and under-voltage protection according to claim 1, characterized in that: the rectifying module comprises a rectifying diode ZL1, a rectifying diode ZL2, a rectifying diode ZL3, a rectifying diode ZL4, a rectifying diode ZL5 and a rectifying diode ZL6, an A phase of the three-phase four-wire connecting end is connected between the rectifying diode ZL1 and the rectifying diode ZL2, a B phase of the three-phase four-wire connecting end is connected between the rectifying diode ZL5 and the rectifying diode ZL6, and a C phase of the three-phase four-wire connecting end is connected between the rectifying diode ZL3 and the rectifying diode ZL 4.
5. A four-pole circuit breaker with current leakage, phase loss and under-voltage protection according to claim 1, characterized in that: the three-phase sampling module comprises a piezoresistor YM1, a piezoresistor YM2, a piezoresistor YM3, a variable resistor RP and a capacitor C10, wherein the piezoresistor YM1 is connected between the N phase and the A phase of a three-phase four-wire connecting end, the piezoresistor YM2 is connected between the N phase and the B phase of the three-phase four-wire connecting end, and the piezoresistor YM3 is connected between the N phase and the C phase of the three-phase four-wire connecting end; the N phase of the three-phase four-wire connecting end is also connected with a second pin of the photoelectric coupler, the variable end of the variable resistor RP is connected with the N phase of the three-phase four-wire connecting end, one fixed end of the variable resistor RP is connected with a common end between the N phase of the three-phase four-wire connecting end and the second pin of the photoelectric coupler, and the other fixed end of the variable resistor RP is connected with the common end of the voltage stabilizing diode W1 and the resistor R8; one end of the capacitor C10 is connected to the common end between the three-phase four-wire connection end N phase and the second pin of the photoelectric coupler, and the other end is connected to the common end of the voltage stabilizing diode W1 and the resistor R8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023121740.0U CN214100836U (en) | 2020-12-22 | 2020-12-22 | Four-pole circuit breaker integrating leakage, phase loss and undervoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023121740.0U CN214100836U (en) | 2020-12-22 | 2020-12-22 | Four-pole circuit breaker integrating leakage, phase loss and undervoltage protection |
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| Publication Number | Publication Date |
|---|---|
| CN214100836U true CN214100836U (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023121740.0U Active CN214100836U (en) | 2020-12-22 | 2020-12-22 | Four-pole circuit breaker integrating leakage, phase loss and undervoltage protection |
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| CN (1) | CN214100836U (en) |
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