CN203825099U - Universal phase verification device - Google Patents

Abstract

The utility model discloses a phase-difference universal phase nuclear device and a phase nuclear method adopted by the device. The device comprises a first connection terminal, a common terminal, a second connection terminal, an overvoltage protection circuit, a switch selection circuit, a waveform Transformation circuit, microprocessor circuit, first connecting terminal charged indicator light, second connecting terminal charged indicator light, in-phase indicator light, out-of-phase indicator light, power supply indicator light, switch circuit, charging circuit and battery circuit; the utility model produces The beneficial effect is: by using the phase difference to check the phase relationship, it is not limited by the voltage level and has universality, and the device is simple to operate, high in safety, and strong in versatility, and can effectively avoid the safety hazards caused by the high-voltage nuclear phase, thereby The safety of the staff and equipment is protected, and the safety of the phase verification work is improved; the phase verification circuit of this device will not cause misjudgment, and it has the function of electric inspection at the same time.

Description

A universal nuclear phase device

Technical field:

The utility model belongs to the technical field of electric power equipment, and relates to the nuclear phase technology of the voltage phase sequence relationship between the switch cabinet and the high-voltage electrified body. More specifically, the utility model relates to a phase difference universal nuclear phase device.

Background technique:

At present, the domestic nuclear phase test of high-voltage switchgear is basically limited to the traditional voltage difference. It is generally believed that the voltage difference between A-A is close to zero, that is, the same voltage. At this time, the luminescent tube of the nuclear phase device is not bright; The voltage difference is large, and the luminous tube of the phase verification device lights up. This test method can accurately check the phase when the voltage of the two lines is basically the same. When the voltage difference is large, but when the voltages of the two lines are different, the voltage difference is relatively large even when they are in the same phase. It is impossible to judge whether they are in-phase or out-of-phase by using the voltage difference type nuclear phase. Especially in practical applications, the capacitance It is impossible for the coupled voltage values of different sensor capacitances to be completely consistent, so the traditional voltage difference will have serious problems in the high-voltage line nuclear phase test.

Utility model content:

Aiming at the above-mentioned prior art, the technical problem to be solved by this utility model is to provide a phase-difference-type universal phase-checking device to check the phase-sequence relationship of voltages between different switch cabinets and high-voltage electrified bodies, even if the voltage difference between the same phases is small Large, the phase difference should be the same, that is, to ensure that phase A corresponds to A, phase B corresponds to B, phase C corresponds to C, and different correspondences are strictly prohibited. Therefore, the above problems can be solved and the power system can be put into operation after maintenance. safety.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a universal phase checking device and its method, which are used to check the phase relationship of different switch cabinets and line voltages, and it is characterized in that it includes: a first connecting terminal, a common terminal, the second connection terminal, overvoltage protection circuit, switch selection circuit, waveform conversion circuit, microprocessor circuit, the first connection terminal charged indicator light, the second connection terminal charged indicator light, the same phase indicator light, different phase indicator light, Power indicator light, switch circuit, charging circuit and battery circuit; the input terminal of the first connection terminal is connected to one phase of a high-voltage equipment, and is used to collect the voltage and voltage phase signal of the high-voltage equipment of this phase; the first terminal The input end of the two connecting terminals is connected with another high-voltage equipment for collecting the voltage and voltage phase signal of the high-voltage equipment; the input end of the common terminal is connected with the common end of the high-voltage equipment; the first connecting terminal, the second The output terminals of the connecting terminal and the common terminal are respectively connected to the input terminals of the overvoltage protection circuit, the output terminals of the overvoltage protection circuit are connected to the input terminals of the switch selection circuit, and the output terminals of the switch selection circuit are connected to the input terminals of the waveform conversion circuit. The output end of the waveform conversion circuit is connected with the A/D end of the microprocessor circuit, the first connection terminal live indicator light, the second connection terminal live light indicator, the same phase indicator light, the out-of-phase indicator light, the power supply indicator light and the switch circuit respectively It is connected with the I/O port of the microprocessor circuit, the output terminal of the charging circuit is connected with the input terminal of the battery circuit, and the output terminal of the battery circuit is connected with the power supply terminal of the microprocessor circuit.

Further, the battery in the battery circuit is a rechargeable lithium battery.

Further, a bidirectional Zener diode is used in the overvoltage protection circuit.

Further, the switch selection circuit is an electronic switch.

Further, the waveform conversion circuit uses a comparator and a NAND gate circuit.

Further, the switch circuit uses light touch buttons.

Further, the charging circuit adopts a USB charging module.

Further, the charged indicator light of the first terminal, the charged indicator light of the second terminal, the in-phase indicator light, the out-of-phase indicator light and the power indicator light are all light-emitting diodes.

The beneficial effects produced by the utility model are: by using the phase difference to check the phase relationship, it is not limited by the voltage level and has universality, and the device is simple to operate, high in safety, and strong in versatility, and can effectively avoid the high-voltage nuclear phase. Potential safety hazards, thereby protecting the safety of staff and equipment, and improving the safety of nuclear phase work; by using this device, the phase nuclear circuit will not cause misjudgment, and it has the function of electric inspection.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the overvoltage protection circuit of the present utility model;

Fig. 3 is the structural representation of the switch protection circuit of the present utility model;

FIG. 4 is a schematic structural diagram of the waveform conversion circuit of the present invention.

Detailed ways:

Below in conjunction with accompanying drawing and embodiment, further set forth the utility model. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, those skilled in the art would realize that the described embodiments may be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

In order to solve the problems existing in the current known technology described in the background technology part of this specification and overcome its defects, and realize the utility model purpose of checking the phase sequence relationship of the voltage between different switch cabinets and high-voltage electrified bodies and the electric test, the utility model adopts The technical solution is:

Please refer to Fig. 1, a kind of universal nuclear phase device, this device comprises first connection terminal 1, common terminal 2, second connection terminal 3, overvoltage protection circuit 4, switch selection circuit 5, waveform transformation circuit 6, microprocessor Circuit 7, first connecting terminal charged indicator light 8, second connecting terminal charged indicator light 9, in-phase indicator light 10, out-of-phase indicator light 11, power indicator light 12, switch circuit 13, charging circuit 14 and battery circuit 15.

Please refer to Fig. 2, there are two sets of identical circuit settings in the overvoltage protection circuit, it can be seen that the first bidirectional Zener diode 4.1 is connected in parallel with the first capacitor 4.2, and the second bidirectional voltage regulator diode 4.3 is connected in parallel with the second capacitor. The two ends of the first parallel structure are respectively connected with the first connection terminal 1 and the common terminal 2, and the two ends of the second parallel structure are respectively connected with the second connection terminal 3 and the common terminal 2; A high-voltage device is connected to collect the voltage and voltage phase signal of the high-voltage device. The second terminal 3 is connected to another high-voltage device to collect the voltage and voltage phase signal of the high-voltage device. The common terminal 2 is connected to The common terminal (usually grounded) of the two high-voltage devices under test, the first terminal 1, the second terminal 3 and the common terminal 2 respectively input the received voltage value and phase signal into the overvoltage protection circuit to prevent nuclear The phase device is short-circuited due to overvoltage or overvoltage.

The voltage phase signal received by the connection terminal is output as two signals J1 and J2 after being stabilized by the voltage protection circuit 4, and the signals are input to the switch selection circuit.

Please refer to Fig. 3, the input terminal of the switch selection circuit 5 inputs two voltage phase signals of J1 and J2 respectively, and the signals are output to the first electronic circuit after being stepped down by the first resistor voltage divider circuit 5.2 and the second resistor voltage divider circuit 5.4 respectively. At switch 5.1 and second electronic switch 5.2, the electronic switch is used to control the start of the device, specifically using a CD4051 or CD4052 type chip, and the output end of the switch selection circuit corresponds to J1 and J2 to output two signals J3 and J4.

Please refer to Fig. 4, the switch selection circuit 5 is connected to the input terminal of the waveform conversion circuit 6, and the J3 and J4 signals are respectively input to the first comparison circuit 6.2 and the second comparison circuit 6.3 in the waveform conversion circuit 6, and the comparison circuit uses LM358 The model chip converts the three-phase sinusoidal voltage waveform signal into a square wave signal, and the two output square wave signals are input to the AND gate circuit 6.1, and the AND gate circuit 6.1 ANDs the two square wave signals to obtain a phase difference signal J5.

The AND gate circuit 6.1 uses a 74HC08 chip.

The output end of the waveform conversion circuit 6 is connected to the A/D end of the microprocessor circuit 7, and the phase difference signal J5 is input to the microprocessor for identification and judgment.

The first connecting terminal charging indicator light 8, the second connecting terminal charging indicator light 9, the same-phase indicator light 10, the out-of-phase indicator light 11, the power supply indicator light 12 and the switch circuit 13 are respectively connected with the I/O port of the microprocessor circuit 7 , if the first connecting terminal 1 is connected to the charged nuclear phase hole, then the first connecting terminal charging indicator light 8 is on; if the second connecting terminal 3 is connected to the charging nuclear phase hole, then the second connecting terminal charging indicator light 9 is on, so The device has an electric test function; if the phase difference signal J5 of the two voltage signals of the first terminal 1 and the second terminal 3 is less than 10° after being judged by the microprocessor, the in-phase indicator light 10 is on; if the first terminal 1 When the phase difference between the two voltage signals of the second connection terminal 3 is greater than 30°, the out-of-phase indicator light 11 is on; when the switch circuit 13 is opened, the power indicator light 12 is on; when the switch circuit 13 is closed, the power indicator light 12 is off.

In the switch circuit 13, light touch keys are used as the switch main body.

The microprocessor adopts PIC series or AVR series or 430 series or 51 series microcontrollers.

The output terminal of the charging circuit 14 is connected with the input terminal of the battery circuit 15, and a USB charging module is adopted in the charging circuit 14, and the charging is flexible.

The output terminal of the battery circuit 15 is connected to the power supply terminal of the microprocessor circuit 7 . The whole device is powered by a 3.6V rechargeable lithium battery in the battery circuit 15 .

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (8)

1. A universal phase checking device for checking the phase relationship of different switch cabinets and line voltages, characterized in that it includes: a first terminal (1), a common terminal (2), a second terminal (3) , overvoltage protection circuit (4), switch selection circuit (5), waveform conversion circuit (6), microprocessor circuit (7), first terminal charged indicator light (8), second terminal charged indicator light ( 9), in-phase indicator light (10), out-of-phase indicator light (11), power indicator light (12), switch circuit (13), charging circuit (14) and battery circuit (15); the first connecting terminal The input terminal of (1) is connected to a high-voltage device for collecting the voltage and voltage phase signal of the high-voltage device; the input terminal of the second connection terminal (3) is connected to another high-voltage device for collecting The voltage and voltage phase signal of the high-voltage equipment; the input terminal of the common terminal (2) is connected to the common terminal of the high-voltage equipment; the first terminal (1), the second terminal (3) and the common terminal (2) The output terminals of the overvoltage protection circuit (4) are respectively connected to the input terminals of the overvoltage protection circuit (4), the output terminals of the overvoltage protection circuit (4) are connected to the input terminals of the switch selection circuit (5), and the output terminals of the switch selection circuit (5) are connected to the waveform The input end of the conversion circuit (6) is connected, the output end of the waveform conversion circuit (6) is connected to the A/D end of the microprocessor circuit (7), the first terminal is charged indicator light (8), and the second terminal is charged The indicator light (9), in-phase indicator light (10), out-of-phase indicator light (11), power indicator light (12) and switch circuit (13) are respectively connected to the I/O port of the microprocessor circuit (7), charging The output terminal of the circuit (14) is connected with the input terminal of the battery circuit (15), and the output terminal of the battery circuit (15) is connected with the power supply terminal of the microprocessor circuit (7). 2. The universal nuclear phase device according to claim 1, characterized in that: the battery in the battery circuit (15) is a rechargeable lithium battery. 3. A universal nuclear phase device according to claim 1, characterized in that: a bidirectional voltage regulator diode is used in the overvoltage protection circuit (4). 4. A phase nuclear device according to claim 1, characterized in that: the switch selection circuit (5) is an electronic switch. 5. A universal nuclear phase device according to claim 1, characterized in that: the waveform transformation circuit (6) uses a comparator and an AND circuit. 6. The universal phase nuclear device according to claim 1, characterized in that: the switch circuit (13) adopts light touch buttons. 7. The universal nuclear phase device according to claim 1, characterized in that: the charging circuit (14) adopts USB charging. 8. A universal phase-nucleating device according to claim 1, characterized in that: said first connecting terminal charged indicator light (8), second connecting terminal charged indicator light (9), same-phase indicator light (10 ), out-of-phase indicator light (11) and power indicator light (12) are all light-emitting diodes.