A three-phase power supply phase sequence detection circuit and device

Abstract

The present disclosure provides a three-phase power supply phase sequence detection circuit and device. The three-phase power supply phase sequence detection circuit includes: a unidirectional conduction unit; an alarm unit, which is connected in series with the unidirectional conduction unit; a switch unit, which is connected in series with the alarm unit; a voltage stabilization unit, which is grounded after being connected in parallel with the alarm unit and the switch unit; a phase shift unit, which is connected in parallel with the voltage stabilization unit, and the phase shift unit is used to shift the phase of the single-phase power by 60 degrees backward; a triode, which is an NPN type, the base of the triode is connected to the phase shift unit, the emitter of the triode is connected to the control end of the switch unit, and the collector of the triode is connected to the voltage stabilization unit; wherein, when the phase of the single-phase power input by the unidirectional conduction unit lags behind the phase of the single-phase power input by the phase shift unit by 120 degrees, the alarm unit does not send out an alarm message. In a three-phase power supply phase sequence detection circuit and device of the present disclosure, the phase sequence of the three-phase power supply can be quickly judged, thereby effectively improving the installation efficiency of electrical equipment.

Description

Technical Field

[0001] The present disclosure relates to the technical field of detection circuits, and particularly to a three-phase power supply phase sequence detection circuit and device. Background Art

[0002] Three-phase alternating current is a form of power transmission, simply referred to as three-phase electricity. A three-phase power supply is a power supply composed of three alternating current potentials with the same frequency, equal amplitude, and phases that are successively 120° out of phase with each other. Three-phase alternating current has many uses. Most AC electrical equipment in industry, such as motors, uses three-phase alternating current.

[0003] Among them, if some electrical equipment is not connected to the three phase lines of the three-phase power supply according to the phase sequence, it is likely to cause major safety accidents. For example, if the three phase lines are not connected to the motor according to the phase sequence, it will cause the motor to reverse. Moreover, for a three-phase power supply without clear markings, the phase sequence judgment is relatively cumbersome, resulting in a low installation efficiency of electrical equipment. Summary of the Invention

[0004] The present disclosure aims to at least solve one of the technical problems in the related art to some extent.

[0005] To this end, the purpose of the present disclosure is to provide a three-phase power supply phase sequence detection circuit and device.

[0006] To achieve the above object, the first aspect of the present disclosure provides a three-phase power supply phase sequence detection circuit, including: a unidirectional conduction unit; an alarm unit, the alarm unit is connected in series with the unidirectional conduction unit; a switch unit, the switch unit is connected in series with the alarm unit; a voltage stabilizing unit, the voltage stabilizing unit is connected to the ground in parallel with the alarm unit and the switch unit; a phase shifting unit, the phase shifting unit is connected in parallel with the voltage stabilizing unit, and the phase shifting unit is used to shift the phase of single-phase electricity backward by 60 degrees; a triode, the triode is an NPN type, the base of the triode is connected to the phase shifting unit, the emitter of the triode is connected to the control end of the switch unit, and the collector of the triode is connected to the voltage stabilizing unit; wherein, when the phase of the single-phase electricity input by the unidirectional conduction unit lags behind the phase of the single-phase electricity input by the phase shifting unit by 120 degrees, the alarm unit does not send out an alarm message.

[0007] Optionally, the detection circuit further includes: a first terminal, the first terminal is connected to the unidirectional conduction unit; a second terminal, the second terminal is connected to the phase shifting unit; a third terminal, the voltage stabilizing unit is connected to the third terminal in parallel with the alarm unit and the switch unit, and the third terminal is grounded.

[0008] Optionally, the unidirectional conduction unit includes: a diode, the anode of the diode is connected to the first terminal; the alarm unit includes: a fourth resistor and an alarm, the first end of the fourth resistor is connected to the cathode of the diode, and the first end of the alarm is connected to the second end of the fourth resistor; the switch unit includes: a thyristor, the anode of the thyristor is connected to the second end of the alarm, the cathode of the thyristor is connected to the third terminal, and the control electrode of the thyristor is connected to the emitter of the triode.

[0009] Optionally, the detection circuit further includes: a second resistor and a fifth resistor, the first end of the second resistor is connected to the second end of the first resistor, the second end of the second resistor is connected to the third terminal, the first end of the fifth resistor is connected to the emitter of the triode, and the second end of the fifth resistor is connected to the third terminal; the voltage regulation unit includes: a third resistor and a first zener diode, the first end of the third resistor is connected to the first end of the fourth resistor, the cathode of the first zener diode is connected to the second end of the third resistor, and the anode of the first zener diode is connected to the cathode of the thyristor.

[0010] Optionally, the phase-shifting unit includes: a first resistor, the first end of the first resistor is connected to the second terminal, the second end of the first resistor is connected to the base of the triode and the third terminal; a phase-shifting capacitor, the first end of the phase-shifting capacitor is connected to the first end of the first resistor, and the second end of the phase-shifting capacitor is connected to the second end of the first resistor.

[0011] Optionally, the detection circuit further includes: a second zener diode, the cathode of the second zener diode is connected to the second end of the first resistor; a third zener diode, the anode of the third zener diode is connected to the anode of the second zener diode, and the cathode of the third zener diode is connected to the third terminal.

[0012] The second aspect of the present disclosure provides a three-phase power supply phase sequence detection device, including: a first box body; a second box body, the first box body is hinged to the second box body; the three-phase power supply phase sequence detection circuit provided in the first aspect of the present disclosure, the three-phase power supply phase sequence detection circuit is arranged in the first box body, and the alarm, the first terminal, the second terminal and the third terminal of the three-phase power supply phase sequence detection circuit are arranged on the surface of the first box body; a first detection pen, the first detection pen is arranged in the second box body, or the first detection pen is connected to the first terminal; a second detection pen, the second detection pen is arranged in the second box body, or the second detection pen is connected to the second terminal; a grounding clip, the grounding clip is arranged in the second box body, or the grounding clip is connected to the third terminal.

[0013] Optionally, a first receiving groove is provided on the second box body, and the first detection pen is clamped in the first receiving groove; a second receiving groove is provided on the second box body, and the second detection pen is clamped in the second receiving groove; therefore, a third receiving groove is provided on the second box body, and the grounding clip is clamped in the third receiving groove.

[0014] Optionally, a first wire winding disc is provided in the first receiving groove, and the cable of the first detection pen is wound around the first wire winding disc; a second wire winding disc is provided in the second receiving groove, and the cable of the second detection pen is wound around the second wire winding disc; a third wire winding disc is provided in the third receiving groove, and the cable of the grounding clip is wound around the third wire winding disc.

[0015] Optionally, a box cover is hinged on the second box body, a strip is provided on the box cover, and a pin is provided on the first box body. The strip is clamped with the pin to make the box cover cover the first receiving groove, the second receiving groove and the third receiving groove.

[0016] The technical solution provided by the present disclosure may include the following beneficial effects:

[0017] The three-phase power supply phase sequence detection circuit can send an alarm message when the phase sequence is incorrect and does not send an alarm message when the phase sequence is correct. Thus, the phase sequence of the three-phase power supply can be quickly judged through the three-phase power supply phase sequence detection circuit, and the installation efficiency of the electrical equipment is effectively improved. At the same time, the overall structure of the three-phase power supply phase sequence detection circuit is simple, the cost is low, and it is easy to be popularized and used.

[0018] The additional aspects and advantages of the present disclosure will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above-mentioned and / or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, in which:

[0020] Figure 1 is a circuit schematic diagram of a three-phase power supply phase sequence detection circuit proposed by an embodiment of the present disclosure;

[0021] Figure 2 is a circuit schematic diagram of a three-phase power supply phase sequence detection circuit proposed by an embodiment of the present disclosure;

[0022] Figure 3 is a schematic structural diagram of a three-phase power supply phase sequence detection device when unfolded proposed by an embodiment of the present disclosure;

[0023] Figure 4 is a schematic structural diagram of a three-phase power supply phase sequence detection device when folded proposed by an embodiment of the present disclosure;

[0024] As shown in the figure: 1. Unidirectional conduction unit, 2. Alarm unit, 3. Switch unit, 4. Voltage stabilizing unit, 5. Phase-shifting unit, 6. First box body, 7. Second box body, 8. First detection pen, 9. Second detection pen, 10. Grounding clamp, 11. First accommodation groove, 12. Second accommodation groove, 13. Third accommodation groove, 14. First winding disk, 15. Second winding disk, 16. Third winding disk, 17. Box cover, 18. Strip;

[0025] R1. First resistor, R2. Second resistor, R3. Third resistor, R4. Fourth resistor, R5. Fifth resistor;

[0026] DW1. First voltage stabilizing diode, DW2. Second voltage stabilizing diode, DW3. Third voltage stabilizing diode;

[0027] Φ1. First terminal, Φ2. Second terminal, Φ3. Third terminal;

[0028] VT1. Thyristor, HL. Light alarm, Q1. Triode, D1. Diode, C1. Phase-shifting capacitor. Specific embodiments

[0029] The embodiments of the present disclosure will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and should not be construed as a limitation of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0030] As Figure 1 shown, an embodiment of the present disclosure provides a three-phase power supply phase sequence detection circuit, including a unidirectional conduction unit 1, an alarm unit 2, a switch unit 3, a voltage stabilizing unit 4, a phase-shifting unit 5, and a triode Q1. The alarm unit 2 is connected in series with the unidirectional conduction unit 1, the switch unit 3 is connected in series with the alarm unit 2, the voltage stabilizing unit 4 is connected in parallel with the alarm unit 2 and the switch unit 3 and then grounded, the phase-shifting unit 5 is connected in parallel with the voltage stabilizing unit 4. The phase-shifting unit 5 is used to shift the phase of the single-phase power by 60 degrees backward. The triode Q1 is an NPN type. The base of the triode Q1 is connected to the phase-shifting unit 5, the emitter of the triode Q1 is connected to the control end of the switch unit 3, and the collector of the triode Q1 is connected to the voltage stabilizing unit 4. Among them, when the phase of the single-phase power input by the unidirectional conduction unit 1 lags behind the phase of the single-phase power input by the phase-shifting unit 5 by 120 degrees, the alarm unit 2 does not send an alarm message.

[0031] It can be understood that the single-phase power input by the unidirectional conduction unit 1 provides the operating voltage for the alarm unit 2, and at the same time provides the operating voltage for the triode Q1 through the voltage stabilizing unit 4. Meanwhile, the triode Q1 is used to control the on-off of the switch unit 3, and the switch unit 3 is used to control the on-off of the alarm unit 2.

[0032] Therefore, when the single-phase power input by the unidirectional conduction unit 1 is the A-phase power and the single-phase power input by the phase-shifting unit 5 is the B-phase power, the phase-shifting unit 5 shifts the phase of the input single-phase power by 60 degrees, so that when the A-phase power is in the positive half-cycle, the B-phase power is in the negative half-cycle, thereby making the triode Q1 cut off, the switch unit 3 turn off, and further making the alarm unit 2 not send out alarm information;

[0033] When the single-phase power input by the unidirectional conduction unit 1 and the single-phase power input by the phase-shifting unit 5 are combined in other ways, since the phase-shifting unit 5 shifts the phase of the input single-phase power by 60 degrees, there is a state where the directions of the single-phase power input by the unidirectional conduction unit 1 and the single-phase power input by the phase-shifting unit 5 are the same in each cycle and last for a certain period of time. Therefore, when the single-phase power input by the unidirectional conduction unit 1 and the single-phase power input by the phase-shifting unit 5 are combined in other ways, the triode Q1 can conduct, thereby making the switch unit 3 conduct, and further making the alarm unit 2 send out alarm information.

[0034] Therefore, through the cooperation of the unidirectional conduction unit 1, the alarm unit 2, the switch unit 3, the voltage stabilizing unit 4, the phase-shifting unit 5 and the triode Q1, when the phase sequences of the single-phase power input by the unidirectional conduction unit 1 and the single-phase power input by the phase-shifting unit 5 are correct, the alarm unit 2 does not send out alarm information; when the phase sequences of the single-phase power input by the unidirectional conduction unit 1 and the single-phase power input by the phase-shifting unit 5 are incorrect, the alarm unit 2 sends out alarm information. Thus, the phase sequence of the three-phase power supply can be quickly judged through the three-phase power supply phase sequence detection circuit, and the installation efficiency of the electrical equipment is effectively improved. At the same time, the overall structure of the three-phase power supply phase sequence detection circuit is simple, the cost is low, and it is easy to promote and use.

[0035] It should be noted that the three-phase power supply includes three single-phase alternating currents with the same frequency, equal amplitude and a phase difference of 120° in sequence, which can be denoted as A-phase power, B-phase power and C-phase power, and the phase sequence of ABC is the positive phase sequence, and the phase sequence of CBA is the negative phase sequence. Usually, the phase sequence used by electrical equipment is ABC. Among them, the positive phase sequence can also be BCA and CAB. At the same time, the negative phase sequence can also be BAC and ACB.

[0036] The following is an example to illustrate the principle of testing the phase sequence of the three-phase power supply phase sequence detection circuit:

[0037] Since the phases of the phase A power, phase B power, and phase C power are successively offset by 120° from each other, when the single-phase power input to the unidirectional conduction unit 1 is phase A power and the single-phase power input to the phase-shifting unit 5 is phase B power, the phase-shifting unit 5 shifts the phase of the phase B power backward by 60 degrees, resulting in a 180° phase difference between the phase A power input to the unidirectional conduction unit 1 and the phase B power input to the phase-shifting unit 5. Thus, when the phase A power is in the positive half-cycle, the phase B power is in the negative half-cycle, and when the phase A power is in the negative half-cycle, the phase B power is in the positive half-cycle. Among them, when the phase A power is in the negative half-cycle, regardless of whether the phase B power is in the positive half-cycle or the negative half-cycle, the alarm unit 2 has no operating voltage, so the alarm unit 2 will not send an alarm message. When the phase A power is in the positive half-cycle, although the phase A power input to the unidirectional conduction unit 1 has the condition to provide operating voltage for the alarm unit 2, under the action of the phase B power, the triode Q1 is in the cut-off state, resulting in the disconnection of the switch unit 3, and further causing the phase A power input to the unidirectional conduction unit 1 to be unable to provide operating voltage for the alarm unit 2. Therefore, the alarm unit 2 will not send an alarm message either.

[0038] When the single-phase power input to the unidirectional conduction unit 1 is phase A power and the single-phase power input to the phase-shifting unit 5 is phase C power, the phase-shifting unit 5 shifts the phase of the phase B power backward by 60 degrees, resulting in a 300° phase difference between the phase A power input to the unidirectional conduction unit 1 and the phase C power input to the phase-shifting unit 5. Thus, in each cycle, during a certain period of time, when the phase A power is in the positive half-cycle, the phase C power is also in the positive half-cycle, and when the phase A power is in the negative half-cycle, the phase C power is also in the negative half-cycle. Among them, when the phase A power is in the negative half-cycle, regardless of whether the phase C power is in the positive half-cycle or the negative half-cycle, the alarm unit 2 has no operating voltage, so the alarm unit 2 will not send an alarm message. When the phase A power is in the positive half-cycle, the phase A power input to the unidirectional conduction unit 1 has the condition to provide operating voltage for the alarm unit 2, and under the action of the phase C power, the triode Q1 can be in the conducting state, resulting in the conduction of the switch unit 3, and further enabling the phase A power input to the unidirectional conduction unit 1 to provide operating voltage for the alarm unit 2. Therefore, the alarm unit 2 can send an alarm message.

[0039] When the single-phase power input to the unidirectional conduction unit 1 is phase B power and the single-phase power input to the phase-shifting unit 5 is phase A power, the phase-shifting unit 5 shifts the phase of the phase A power backward by 60 degrees, resulting in a 60° difference between the phase B power input to the unidirectional conduction unit 1 and the phase A power input to the phase-shifting unit 5. Thus, in each cycle, during a certain period of time, when the phase B power is in the positive half-cycle, the phase A power is also in the positive half-cycle, and when the phase B power is in the negative half-cycle, the phase A power is also in the positive half-cycle. Among them, when the phase B power is in the negative half-cycle, regardless of whether the phase A power is in the positive half-cycle or the negative half-cycle, the alarm unit 2 has no operating voltage, so the alarm unit 2 will not send an alarm message. When the phase B power is in the positive half-cycle, the phase B power input to the unidirectional conduction unit 1 has the condition to provide the operating voltage for the alarm unit 2, and under the action of the phase A power, the triode Q1 can be in the conducting state, thus causing the switch unit 3 to conduct, and further enabling the phase B power input to the unidirectional conduction unit 1 to provide the operating voltage for the alarm unit 2, so the alarm unit 2 can send an alarm message.

[0040] It can be inferred from this that in the negative phase sequence, the alarm unit 2 sends alarm messages. And in the positive phase sequence, when the single-phase power input to the unidirectional conduction unit 1 is phase A power and the single-phase power input to the phase-shifting unit 5 is phase C power, the alarm unit 2 also sends alarm messages. Only when the phase of the single-phase power input to the unidirectional conduction unit 1 lags behind the phase of the single-phase power input to the phase-shifting unit 5 by 120 degrees, the alarm unit 2 will not send an alarm message.

[0041] That is to say, during the test, any two phase powers of the three-phase power supply are respectively input to the unidirectional conduction unit 1 and the phase-shifting unit 5. If the alarm unit 2 sends an alarm message, it means that the phase sequence is incorrect. At this time, the phase power input to the unidirectional conduction unit 1 can be counted as phase A power, the phase power input to the phase-shifting unit 5 can be counted as phase C power, and the other unused phase power can be counted as phase B power, thus realizing the rapid judgment of the phase sequence of the three phase powers of the three-phase power supply.

[0042] Since the single-phase power input to the unidirectional conduction unit 1 is alternating current, the single-phase power input to the unidirectional conduction unit 1 provides intermittent operating power for the alarm unit 2, and the voltage stabilizing unit 4 also provides intermittent operating voltage for the triode Q1.

[0043] The NPN-type triode Q1 includes two N (Negative) type semiconductors and one P (Positive) type semiconductor. The P-type semiconductor is arranged between the two N-type semiconductors. The triode Q1 includes a base (Base), an emitter (Emitter), and a collector (Collector). When the triode Q1 is in the cut-off state, the emitter and the collector are disconnected. When the triode Q1 is in the conducting state, the emitter and the collector are conducting. The specific type of the triode Q1 can be set according to actual needs and is not limited here.

[0044] Such asFigure 2 As shown, in some embodiments, the detection circuit further includes a first terminal Φ1, a second terminal Φ2, and a third terminal Φ3. The first terminal Φ1 is connected to the unidirectional conduction unit 1, the second terminal Φ2 is connected to the phase-shifting unit 5, and the voltage stabilization unit 4 is connected to the alarm unit 2 and the switch unit 3 in parallel and then connected to the third terminal Φ3, and the third terminal Φ3 is grounded.

[0045] It can be understood that through the settings of the first terminal Φ1, the second terminal Φ2, and the third terminal Φ3, it is convenient to ground the three-phase power supply phase sequence detection circuit as a whole and connect it to two phase lines of the AC power supply.

[0046] As Figure 2 shown, in some embodiments, the unidirectional conduction unit 1 includes a diode D1, and the anode of the diode D1 is connected to the first terminal Φ1;

[0047] The alarm unit 2 includes a fourth resistor R4 and an alarm. The first end of the fourth resistor R4 is connected to the cathode of the diode D1, and the first end of the alarm is connected to the second end of the fourth resistor R4;

[0048] The switch unit 3 includes a thyristor VT1. The anode of the thyristor VT1 is connected to the second end of the alarm, the cathode of the thyristor VT1 is connected to the third terminal Φ3, and the control electrode of the thyristor VT1 is connected to the emitter of the triode Q1.

[0049] It can be understood that through the unidirectional conduction function of the diode D1, the alarm can obtain intermittent direct current under the action of single-phase alternating current, so as to ensure the emission of alarm information. Through the voltage division function of the fourth resistor R4, the intermittent direct current can meet the use of the alarm. Through the setting of the thyristor VT1, it is convenient to control the opening of the alarm after the triode Q1 conducts.

[0050] It should be noted that the diode D1 is an electronic device made of semiconductor material, and it has unidirectional conductivity, that is, when a positive voltage is applied to the anode of the diode D1, the diode D1 conducts, and when a reverse voltage is applied to the cathode, the diode D1 cuts off. The specific type of the diode D1 can be set according to actual needs and is not limited here.

[0051] The specific resistance value of the fourth resistor R4 can be set according to actual needs. For example: the resistance value of the fourth resistor R4 can be 1 kΩ.

[0052] The specific type of the alarm can be set according to actual needs. For example: a sound alarm, a light alarm HL, an audible and visual alarm.

[0053] The thyristor VT1 is a high-power electrical component, also known as a thyristor, and its on / off state is determined by the control electrode G. The specific type of the thyristor VT1 can be set according to actual needs and is not limited here.

[0054] As Figure 2 shown, in some embodiments, the detection circuit further includes a second resistor R2 and a fifth resistor R5. The first end of the second resistor R2 is connected to the second end of the first resistor R1, the second end of the second resistor R2 is connected to the third terminal Φ3, the first end of the fifth resistor R5 is connected to the emitter of the triode Q1, and the second end of the fifth resistor R5 is connected to the third terminal Φ3;

[0055] The voltage regulation unit 4 includes a third resistor R3 and a first voltage-regulator diode DW1. The first end of the third resistor R3 is connected to the first end of the fourth resistor R4, the cathode of the first voltage-regulator diode DW1 is connected to the second end of the third resistor R3, and the anode of the first voltage-regulator diode DW1 is connected to the cathode of the thyristor VT1.

[0056] It can be understood that through the second resistor R2, the third resistor R3, and the fifth resistor R5, a bias voltage can be provided for the triode Q1 to ensure the stable on / off of the triode Q1, and by utilizing the voltage regulation function of the first voltage-regulator diode DW1, the third resistor R3 provides a stable intermittent voltage for the triode Q1.

[0057] It should be noted that the specific type of the first voltage-regulator diode DW1 can be set according to actual needs and is not limited here.

[0058] The specific resistance values of the second resistor R2, the third resistor R3, and the fifth resistor R5 can be set according to actual needs. For example: the resistance value of the second resistor R2 can be 3.9 kΩ, the resistance value of the third resistor R3 can be 7 kΩ, and the resistance value of the fifth resistor R5 can be 430 Ω.

[0059] As Figure 2 shown, in some embodiments, the phase-shifting unit 5 includes a first resistor R1 and a phase-shifting capacitor C1. The first end of the first resistor R1 is connected to the second terminal Φ2, the second end of the first resistor R1 is connected to the base of the triode Q1 and the third terminal Φ3, the first end of the phase-shifting capacitor C1 is connected to the first end of the first resistor R1, and the second end of the phase-shifting capacitor C1 is connected to the second end of the first resistor R1.

[0060] It can be understood that through the cooperation of the first resistor R1 and the phase-shifting capacitor C1, the phase of the single-phase alternating current can be shifted backward, so as to ensure the accurate judgment of the phase sequence of the three-phase electricity of the three-phase power supply.

[0061] It should be noted that the specific resistance value of the first resistor R1 can be set according to actual needs. For example, the resistance value of the first resistor R1 can be 1 MΩ.

[0062] The specific capacitance value of the phase-shifting capacitor C1 can be set according to actual needs. For example, the capacitance value of the phase-shifting capacitor C1 can be 0.1 μF.

[0063] As Figure 2 shown, in some embodiments, the detection circuit further includes a second zener diode DW2 and a third zener diode DW3. The cathode of the second zener diode DW2 is connected to the second end of the first resistor R1, the anode of the third zener diode DW3 is connected to the anode of the second zener diode DW2, and the cathode of the third zener diode DW3 is connected to the third terminal Φ3.

[0064] It can be understood that by the reverse series connection of the second zener diode DW2 and the third zener diode DW3, the amplitude of the single-phase voltage input to the moving unit can be effectively limited, so as to ensure that the phase-shifting unit 5 can provide a stable control signal for the base of the triode Q1.

[0065] It should be noted that the specific types of the second zener diode DW2 and the third zener diode DW3 can be set according to actual needs and are not limited herein.

[0066] As Figure 3 and Figure 4 shown, the embodiment of the present disclosure also provides a three-phase power supply phase sequence detection device, including a first box body 6, a second box body 7, a first detection pen 8, a second detection pen 9, a grounding clip 10, and a three-phase power supply phase sequence detection circuit as in the embodiment of the present disclosure. The first box body 6 is hinged to the second box body 7. The three-phase power supply phase sequence detection circuit is arranged in the first box body 6, and the alarm, the first terminal Φ1, the second terminal Φ2, and the third terminal Φ3 of the three-phase power supply phase sequence detection circuit are arranged on the surface of the first box body 6. The first detection pen 8 is arranged in the second box body 7, or the first detection pen 8 is connected to the first terminal Φ1. The second detection pen 9 is arranged in the second box body 7, or the second detection pen 9 is connected to the second terminal Φ2. The grounding clip 10 is arranged in the second box body 7, or the grounding clip 10 is connected to the third terminal Φ3.

[0067] It can be understood that during use, the first detection pen 8 is connected to the first terminal Φ1, the second detection pen 9 is connected to the second terminal Φ2, and the grounding clip 10 is connected to the third terminal Φ3. Thus, it is convenient to test the three-phase electricity of the AC power supply through the first detection pen 8, the second detection pen 9, and the grounding clip 10, making the phase sequence detection more convenient;

[0068] During idleness, the first detection pen 8, the second detection pen 9, and the grounding clip 10 are placed in the second box body 7, so as to facilitate the overall storage and carrying.

[0069] Among them, through the settings of the first box body 6 and the second box body 7, it is not only convenient to protect the three-phase power supply phase sequence detection circuit and the first detection pen 8, the second detection pen 9 and the grounding clip 10, but also because the first box body 6 is hinged to the second box body 7, so the first box body 6 and the second box body 7 can be folded and stored, thus facilitating carrying and making the overall use more convenient.

[0070] The three-phase power supply phase sequence detection circuit can send out an alarm message when the phase sequence is incorrect and does not send out an alarm message when the phase sequence is correct. Thus, through the three-phase power supply phase sequence detection circuit, the phase sequence of the three-phase power supply can be quickly judged, and the installation efficiency of the electrical equipment is effectively improved. At the same time, the overall structure of the three-phase power supply phase sequence detection circuit is simple, the cost is low, and it is easy to be popularized and used.

[0071] It should be noted that the hinge connection between the first box body 6 and the second box body 7 can be set according to actual needs. For example: the first box body 6 is connected to the second box body 7 through a hinge.

[0072] The first terminal Φ1, the second terminal Φ2 and the third terminal Φ3 can be set as the first female socket, and the corresponding male sockets are arranged on the first detection pen 8, the second detection pen 9 and the grounding clip 10. The male sockets are inserted into the first female socket, so as to facilitate the disassembly and assembly of the first detection pen 8, the second detection pen 9 and the grounding clip 10 on the first box body 6. At the same time, corresponding female sockets can also be arranged in the second box body 7, and the male sockets are inserted into the second female socket, so as to facilitate the disassembly and assembly of the first detection pen 8, the second detection pen 9 and the grounding clip 10 in the second box body 7.

[0073] The specific types of the first detection pen 8 and the second detection pen 9 can be set according to actual needs. Taking the first detection pen 8 as an example, the first detection pen 8 includes a metal rod and an insulating sleeve. The insulating sleeve is sleeved on the metal rod, and one end of the metal rod exposes the insulating sleeve. The other end of the metal rod is connected to the male socket through a cable.

[0074] The specific type of the grounding clip 10 can be set according to actual needs. For example: the grounding clip 10 includes a first metal clip body, a second metal clip body and a torsion spring. The first metal clip body is hinged to the second metal clip body, and the torsion spring is arranged between the first metal clip body and the second metal clip body. Thus, under the action of the torsion spring, the first metal clip body and the second metal clip body can clamp on a grounding member such as a ground wire. At the same time, insulating pads are arranged on both the first metal clip body and the second metal clip body, and the contact part of the first metal clip body and the second metal clip body exposes the insulating pad.

[0075] When in use, first clamp the grounding clip 10 on the ground wire, and then detect the phase sequence of the three-phase electricity of the AC power supply through the first detection pen 8 and the second detection pen 9.

[0076] Identifications corresponding to the first terminal Φ1, the second terminal Φ2, and the third terminal Φ3 may be provided on the surface of the first box body 6 to facilitate the distinction of the first terminal Φ1, the second terminal Φ2, and the third terminal Φ3. The multiple identifications may be different symbols or different colors, etc.

[0077] As Figure 3 shown, in some embodiments, a first receiving groove 11 is provided on the second box body 7, the first detection pen 8 is clamped in the first receiving groove 11, a second receiving groove 12 is provided on the second box body 7, the second detection pen 9 is clamped in the second receiving groove 12, and thus a third receiving groove 13 is provided on the second box body 7, and the grounding clip 10 is clamped in the third receiving groove 13.

[0078] It can be understood that through the settings of the first receiving groove 11, the second receiving groove 12, and the third receiving groove 13, it is convenient to place the first detection pen 8, the second detection pen 9, and the grounding clip 10 in an orderly manner in the second box body 7, making the use more convenient. At the same time, through the clamping of the first detection pen 8 in the first receiving groove 11, the clamping of the second detection pen 9 in the second receiving groove 12, and the clamping of the grounding clip 10 in the third receiving groove 13, not only is the storage of the first detection pen 8, the second detection pen 9, and the grounding clip 10 in the second box body 7 more stable, but also it is convenient for disassembly.

[0079] It should be noted that the specific shapes of the first receiving groove 11, the second receiving groove 12, and the third receiving groove 13 can be set according to the shapes of the first detection pen 8, the second detection pen 9, and the grounding clip 10, and no limitation is made here.

[0080] The clamping structures of the first detection pen 8 in the first receiving groove 11, the second detection pen 9 in the second receiving groove 12, and the grounding clip 10 in the third receiving groove 13 can be set according to actual needs. Taking the clamping structure of the first detection pen 8 in the first receiving groove 11 as an example, elastic pieces are provided on the groove wall of the first receiving groove 11, and the first detection pen 8 is clamped in the first receiving groove 11 through the elastic pieces.

[0081] Among them, in order to facilitate the disassembly and assembly of the first detection pen 8, the second detection pen 9, and the grounding clip 10, gaps can be provided on both sides of the first receiving groove 11, both sides of the second receiving groove 12, and both sides of the third receiving groove 13 to leave an operating space.

[0082] As Figure 3 shown, in some embodiments, a first wire winding disc 14 is provided in the first receiving groove 11, the cable of the first detection pen 8 is wound on the first wire winding disc 14, a second wire winding disc 15 is provided in the second receiving groove 12, the cable of the second detection pen 9 is wound on the second wire winding disc 15, a third wire winding disc 16 is provided in the third receiving groove 13, and the cable of the grounding clip 10 is wound on the third wire winding disc 16.

[0083] It can be understood that through the arrangement of the first wire winding disc 14, the second wire winding disc 15 and the third wire winding disc 16, it is convenient to store the cables of the first detection pen 8, the second detection pen 9 and the grounding clip 10, making the overall use more convenient.

[0084] It should be noted that the specific types of the first wire winding disc 14, the second wire winding disc 15 and the third wire winding disc 16 can be set according to actual needs. Taking the first wire winding disc 14 as an example, the first wire winding disc 14 includes a winding shaft and a limiting disc. The winding shaft is fixedly arranged in the first accommodating groove 11, and the limiting disc is fixedly arranged at one end of the winding shaft away from the first accommodating groove 11. The cable of the first detection pen 8 is wound around the winding shaft.

[0085] As Figure 4 shown, in some embodiments, a lid 17 is hinged on the second box body 7. A strip 18 is arranged on the lid 17, and a pin is arranged on the first box body 6. The strip 18 is clamped with the pin so that the lid 17 covers the first accommodating groove 11, the second accommodating groove 12 and the third accommodating groove 13.

[0086] It can be understood that through the arrangement of the lid 17, the arrangements of the first detection pen 8, the second detection pen 9 and the grounding clip 10 in the first accommodating groove 11, the second accommodating groove 12 and the third accommodating groove 13 can be made more stable, and the first detection pen 8, the second detection pen 9 and the grounding clip 10 can be further protected. At the same time, through the cooperation of the strip 18 and the pin, not only the covering of the lid 17 on the second box body 7 and the folding between the first box body 6 and the second box body 7 are made more stable, but also it is convenient to disassemble.

[0087] It should be noted that after the first box body 6 and the second box body 7 are folded, a gap should be left between the lid 17 and the first box body 6 to ensure the stable opening and closing of the lid 17.

[0088] The specific type of the strip 18 can be set according to actual needs. For example, the strip 18 is made of plastic, and a clamping hole is arranged on the strip 18. The size of the clamping hole is smaller than that of the pin.

[0089] The alarm, the first terminal Φ1, the second terminal Φ2 and the third terminal Φ3 are arranged on the same side of the first box body 6. The first accommodating groove 11, the second accommodating groove 12 and the third accommodating groove 13 are arranged on the same side of the second box body 7. And after the first box body 6 and the second box body 7 are hinged, the side of the first box body 6 away from the first terminal Φ1, the second terminal Φ2 and the third terminal Φ3 abuts against the side of the second box body 7 away from the first accommodating groove 11, the second accommodating groove 12 and the third accommodating groove 13.

[0090] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more.

[0091] Any process or method description shown in a flowchart or otherwise described herein can be understood to represent a module, segment, or portion of code including one or more executable instructions for implementing a specific logical function or process. The scope of the preferred embodiments of the present disclosure includes additional implementations, where the functions may be performed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed. This should be understood by those skilled in the art to which the embodiments of the present disclosure pertain.

[0092] In the description of this specification, descriptions with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0093] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A three-phase power supply phase sequence detection circuit, characterized in that including: a one-way conduction unit; an alarm unit, the alarm unit being connected in series with the one-way conduction unit; a switch unit, the switch unit being connected in series with the alarm unit; a voltage stabilizing unit, the voltage stabilizing unit being connected to the ground after being connected in parallel with the alarm unit and the switch unit; a phase-shifting unit, the phase-shifting unit being connected in parallel with the voltage stabilizing unit, the phase-shifting unit being configured to shift the phase of single-phase electricity backward by 60 degrees; a triode, the triode being of NPN type, the base of the triode being connected to the phase-shifting unit, the emitter of the triode being connected to the control end of the switch unit, and the collector of the triode being connected to the voltage stabilizing unit; wherein, when the phase of the single-phase electricity input by the one-way conduction unit lags behind the phase of the single-phase electricity input by the phase-shifting unit by 120 degrees, the alarm unit does not send out an alarm message.

2. The three-phase power supply phase sequence detection circuit according to claim 1, wherein The detection circuit further includes: a first terminal, the first terminal being connected to the one-way conduction unit; a second terminal, the second terminal being connected to the phase-shifting unit; a third terminal, the voltage stabilizing unit, the alarm unit and the switch unit being connected in parallel and then connected to the third terminal, and the third terminal being grounded.

3. The three-phase power supply phase sequence detection circuit according to claim 2, wherein the one-way conduction unit includes: a diode, the anode of the diode being connected to the first terminal; the alarm unit includes: a fourth resistor and an alarm, the first end of the fourth resistor being connected to the cathode of the diode, and the first end of the alarm being connected to the second end of the fourth resistor; the switch unit includes: a thyristor, the anode of the thyristor being connected to the second end of the alarm, the cathode of the thyristor being connected to the third terminal, and the control electrode of the thyristor being connected to the emitter of the triode.

4. The three-phase power supply phase sequence detection circuit according to claim 3, characterized in that, The phase-shifting unit includes: a first resistor, the first end of the first resistor being connected to the second terminal, and the second end of the first resistor being connected to the base of the triode and the third terminal; a phase-shifting capacitor, the first end of the phase-shifting capacitor being connected to the first end of the first resistor, and the second end of the phase-shifting capacitor being connected to the second end of the first resistor.

5. The three-phase power supply phase sequence detection circuit according to claim 4, wherein the detection circuit further includes: a second resistor and a fifth resistor, the first end of the second resistor being connected to the second end of the first resistor, the second end of the second resistor being connected to the third terminal, the first end of the fifth resistor being connected to the emitter of the triode, and the second end of the fifth resistor being connected to the third terminal; the voltage stabilizing unit includes: a third resistor and a first voltage stabilizing diode, the first end of the third resistor being connected to the first end of the fourth resistor, the cathode of the first voltage stabilizing diode being connected to the second end of the third resistor, and the anode of the first voltage stabilizing diode being connected to the cathode of the thyristor.

6. The three-phase power supply phase sequence detection circuit according to claim 5, characterized in that, The detection circuit further includes: a second voltage stabilizing diode, the cathode of the second voltage stabilizing diode being connected to the second end of the first resistor; A third voltage stabilizing diode, the anode of the third voltage stabilizing diode being connected to the anode of the second voltage stabilizing diode, and the cathode of the third voltage stabilizing diode being connected to the third terminal.

7. A three-phase power supply phase sequence detection device, characterized in that, Comprising: A first box body; A second box body, the first box body being hinged to the second box body; The three-phase power supply phase sequence detection circuit according to any one of claims 1-6, the three-phase power supply phase sequence detection circuit being disposed in the first box body, and the alarm, the first terminal, the second terminal and the third terminal of the three-phase power supply phase sequence detection circuit being disposed on the surface of the first box body; A first detection pen, the first detection pen being disposed in the second box body, or the first detection pen being connected to the first terminal; A second detection pen, the second detection pen being disposed in the second box body, or the second detection pen being connected to the second terminal; A grounding clip, the grounding clip being disposed in the second box body, or the grounding clip being connected to the third terminal.

8. The three-phase power supply phase sequence detection device according to claim 7, characterized in that A first receiving groove is provided on the second box body, and the first detection pen is clamped in the first receiving groove; A second receiving groove is provided on the second box body, and the second detection pen is clamped in the second receiving groove; Therefore, a third receiving groove is provided on the second box body, and the grounding clip is clamped in the third receiving groove.

9. The three-phase power supply phase sequence detection device according to claim 8, characterized in that A first wire winding disc is provided in the first receiving groove, and the cable of the first detection pen is wound around the first wire winding disc; A second wire winding disc is provided in the second receiving groove, and the cable of the second detection pen is wound around the second wire winding disc; A third wire winding disc is provided in the third receiving groove, and the cable of the grounding clip is wound around the third wire winding disc.

10. The three-phase power supply phase sequence detection device according to claim 8, characterized in that, A box cover is hinged on the second box body, a strip is provided on the box cover, and a snap pin is provided on the first box body. The strip is snap-connected to the snap pin so that the box cover covers the first receiving groove, the second receiving groove and the third receiving groove.

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