Residual current test equipment with wide-range output

Abstract

A wide-range output residual current test device disclosed by the present invention comprises a machine body, a main control unit is arranged in the machine body, the main control unit comprises a current source, a personal terminal and a 500A main control part, and the main control unit is connected with a charging pile test port and a circuit breaker test port. The charging pile test port and the circuit breaker test port are connected with a current enable circuit, a polarity setting circuit, a waveform setting circuit, a pre-connection selection circuit and a voltage enable circuit. Current of various waveforms can be generated, the waveforms comprise various waveforms of B-type residual current, the residual current testing requirements of a circuit breaker and a charging pile are compatible, continuous climbing of the current can be achieved, the device is used for testing B-type and below residual current tripping current, sudden adding of the current is achieved, and monitoring of the test is achieved through control of upper computer software. And test results can be automatically recorded and stored, so that energy conservation and environmental protection are realized, and meanwhile, full coverage of B-type residual current operating characteristic test contents of the circuit breaker and the charging pile can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of electric variable measuring equipment, and more specifically to a residual current testing equipment with wide-range output. Background Art

[0002] Electrical variables refer to physical quantities such as voltage, current and charge in a circuit. They change with time. Electrical variables have many applications in circuits. For example, voltage and current are the most basic electrical variables in a circuit. They can be used to describe various phenomena in the circuit. In addition, electrical variables have many other application fields. For example, in electrochemical analysis, the Nernst equation can be used to calculate the electromotive force of various batteries. The measurement of electrical variables requires special equipment. RCD is a device used to detect the magnitude of leakage current in the circuit. In the power system, electrical variable measurement is a vital technology. Electrical variable measurement covers key parameters such as current, voltage, power factor, active power, reactive power, etc. These parameters are of great significance to the stable operation of the power system, the effective use of energy, and fault detection. Residual current, that is, leakage current, is an important indicator for evaluating the safety performance of electrical equipment. By measuring the residual current, the insulation fault of the equipment can be discovered in time to prevent electrical fires and personal electric shock accidents. The output current of the residual current test equipment in the prior art is small, and it cannot cover all test items of the residual current of the circuit breaker and the charging pile. Therefore, it is necessary to provide a new technical solution to solve it. Summary of the invention

[0003] The purpose of the present invention is to provide a residual current test device with wide-range output, which solves the shortcomings of the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a residual current test device with a wide range output, comprising: a body, a main control unit is arranged inside the body, and the main control unit includes a current source, a personal terminal and a 500A main control part, the main control unit is connected to a charging pile test port and a circuit breaker test port, the charging pile test port and the circuit breaker test port are connected to a current enabling circuit, a polarity setting circuit, a waveform setting circuit, a pre-pass selection circuit and a voltage enabling circuit, the surface of the body is provided with a touch screen and the lower part of the touch screen A main control module is provided, the touch screen and the main control module are connected to the main control unit, a circuit breaker test module and a charging pile test module are provided at the lower part of the main control module, the circuit breaker test module is connected to the circuit breaker test port, the charging pile test module is connected to the charging pile test port, the charging pile test module includes an industrial socket port, a panel socket port and a charging pile socket port, a circuit breaker for testing is installed on the surface of the body, the circuit breaker includes an outer shell, and a display module is provided on the surface of the outer shell and displays The module is connected to the test circuit, an indicator light is provided on one side of the display module, a control button is provided on the side of the display module and the control button is connected to the test circuit, a plurality of groups of heat dissipation holes are provided on both sides of the outer shell and the heat dissipation holes are distributed at equal intervals, an upper wiring port is provided on the upper end of the outer shell and a lower wiring port is provided on the lower part, the upper wiring port is a voltage input terminal, the lower interface is a connection terminal of the circuit breaker test port and the charging pile test port, fasteners are provided on the sides of the upper wiring port and the lower wiring port, fixing grooves are provided on the upper and lower ends of the outer shell and a fixing hole is provided inside the fixing groove, a buzzer is provided on the surface of the outer shell and the buzzer is electrically connected to the test circuit, a buffer pad is provided on the back of the outer shell and the buffer pad corresponds to the fixing hole, an adjustment hole is provided inside the outer shell and the adjustment block is located inside the adjustment block, a movable plate matching the heat dissipation hole is connected to the side of the adjustment block and a through hole corresponding to the heat dissipation hole is provided inside the movable plate, a communication interface is provided on the side of the upper wiring port and the PC end is connected through the communication interface.

[0005] As a preferred implementation manner of the present invention, the current enabling circuit includes a circuit breaker loop current enabling switch and a charging pile loop current enabling switch.

[0006] As a preferred embodiment of the present invention, the polarity setting circuit includes a non-polarity switch, a negative polarity switch and a positive polarity switch.

[0007] As a preferred embodiment of the present invention, the main control module includes a start button, a control circuit power switch, a control circuit power indicator light, a main control power indicator light, a main control switch and a three-phase voltmeter.

[0008] As a preferred implementation manner of the present invention, the main control module also includes a USB interface and a reserved socket.

[0009] As a preferred embodiment of the present invention, a plurality of heat dissipation holes distributed at equal intervals are arranged at the bottom of the body.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The input voltage of this scheme is a three-phase voltage. KM101 is used to control the voltage enable, KM110 is used to short-circuit the test product for current pre-passing, KM102, KM103, KM104 are used to select the phase line to which the current is applied, KM105 and KM106 are used to control the current direction, KM109 is used to select AC current when it is turned on, and KM107 and KM108 are used to select the current to flow through the circuit breaker circuit or the charging pile circuit. Resistor R is an adjustable resistor. Under the condition of a certain input voltage, the desired current value can be obtained by adjusting resistor R. The current waveforms that can be generated by this resistance circuit include AC current, half-wave rectified waveform current, two-phase rectified waveform current, and three-phase rectified waveform current. The current values ​​that can be achieved include AC current 500A, half-wave rectified waveform current 350A, two-phase rectified waveform current 200A, and three-phase rectified waveform current 200A. The current source is a current generator used to achieve current climbing, and its current waveform covers all waveforms of type B residual current. The device provides test interfaces for circuit breakers and charging piles, and can control the closing and opening of charging piles. The device can generate currents of various waveforms, including various waveforms of type B residual current, compatible with the residual current test requirements of circuit breakers and charging piles, and achieves energy saving and environmental protection. It can also achieve continuous climbing of residual current, and is used for testing the tripping current of type B and below residual currents, realizing the sudden increase of residual current, and testing the tripping time of type B and below residual currents. The monitoring and automatic testing of the test are realized through the control of the upper computer software, and the test results can be automatically recorded and stored. The full coverage of the test content of the type B residual current action characteristics of circuit breakers and charging piles can be achieved. The device can measure the residual current of different types of devices, improve the utilization efficiency of electric energy, and reduce the loss of reactive power. It can be used in the field of new energy to realize real-time monitoring and analysis of energy consumption, and can formulate more scientific and reasonable energy-saving plans, improve energy utilization efficiency, reduce energy waste, and effectively achieve energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the circuit breaker structure of the present invention Figure 3 Another structural diagram of the circuit breaker of the present invention Figure 4It is a schematic diagram of the test circuit principle of the present invention.

[0012] In the figure: 1. Machine body; 2. Touch screen; 3. Main control module; 4. Control circuit power switch; 5. Control circuit power indicator light; 6. Main control power indicator light; 7. Main control switch; 8. Three-phase voltmeter; 9. Start button; 10. USB interface; 11. Reserved socket; 12. Circuit breaker test module; 13. Industrial socket port; 14. Panel socket port; 15. Charging pile socket port; 16. Heat dissipation hole; 17. Charging pile test module; 18. Circuit breaker; 19. Outer shell; 20. Heat dissipation hole; 21. Adjustment hole; 22. Adjustment block; 23. Lower wiring port; 24. Fastener; 25. Buffer pad; 26. Fixing slot; 27. Display module; 28. Indicator light; 29. ​​Control button; 30. Buzzer; 31. Upper wiring port; 32. Communication interface. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1-4The present invention provides a technical solution: a residual current test device with a wide range output, comprising: a body 1, a main control unit is arranged inside the body 1 and the main control unit includes a current source, a personal terminal and a 500A main control part, the main control unit is connected to a charging pile test port and a circuit breaker test port, the charging pile test port and the circuit breaker test port are connected to a current enabling circuit, a polarity setting circuit, a waveform setting circuit, a pre-pass selection circuit and a voltage enabling circuit, a touch screen 2 is arranged on the surface of the body 1 and a main control module 3 is arranged at the bottom of the touch screen 2, the touch screen 2 and the main control module 3 are connected to the main control unit, and a circuit breaker test module 12 and a charging pile test module 13 are arranged at the bottom of the main control module 3 The circuit breaker test module 12 is connected to the circuit breaker test port, the charging pile test module 13 is connected to the charging pile test port, the charging pile test module 13 includes an industrial socket port 17, a panel socket port 14 and a charging pile socket port 15, a circuit breaker 18 for testing is installed on the surface of the body 1, and the circuit breaker 18 includes an outer shell 19, a display module 27 is provided on the surface of the outer shell 19, and the display module 27 is connected to the test circuit, an indicator light 28 is provided on one side of the display module 27, a control button 29 is provided on the side of the display module 27, and the control button 29 is connected to the test circuit, and a plurality of heat dissipation holes 20 are provided on both sides of the outer shell 19, and the heat dissipation holes 20 are provided on both sides of the outer shell 19. The heat holes 20 are distributed at equal intervals. An upper wiring port 31 is provided at the upper end of the outer shell 19 and a lower wiring port 23 is provided at the lower part. The upper wiring port 31 is a voltage input terminal, and the lower interface is a connection terminal of the circuit breaker test port and the charging pile test port. Fasteners 24 are provided on the sides of the upper wiring port 31 and the lower wiring port 23. The upper and lower ends of the outer shell 19 are provided with fixing grooves 26, and the interior of the fixing grooves 26 is provided with fixing holes. This arrangement facilitates the installation and fixation of the device. A buzzer 30 is provided on the surface of the outer shell 19 and the buzzer 30 is electrically connected to the test circuit. When the test exceeds the threshold, an alarm is sounded. A buffer pad 25 is provided on the back of the outer shell 19, and the buffer pad 25 corresponds to the fixing hole. The setting of the buffer pad 25 reduces the rigid contact of the device to avoid damage. The outer shell 19 is provided with an adjustment hole 21 and the adjustment block 22 is located inside the adjustment block 22. The side of the adjustment block 22 is connected with a movable plate that matches the heat dissipation hole 20 and the movable plate is provided with a through hole corresponding to the heat dissipation hole 20. By moving the adjustment block to move it in the adjustment hole, the position between the through hole and the heat dissipation hole can be controlled, so that the switch of the heat dissipation hole can be adjusted. The side of the upper wiring port 31 is provided with a communication interface 32 and the PC input voltage is connected through the communication interface 32. The three-phase voltage, KM101 is used to control the voltage enable, KM110 is used to short-circuit the test sample for current pre-passing, KM102, KM103,KM104 is used to select the phase line to which the current is applied, KM105 and KM106 are used to control the current direction, KM109 is used to select AC current when it is turned on, and KM107 and KM108 are used to select the current to flow through the circuit breaker circuit or the charging pile circuit. Resistor R is an adjustable resistor. Under the condition of a certain input voltage, the desired current value can be obtained by adjusting resistor R. The current waveforms that can be generated by this resistance circuit include AC current, half-wave rectification waveform current, two-phase rectification waveform current, and three-phase rectification waveform current. The current values ​​that can be achieved include AC current 500A, half-wave rectification waveform current 350A, two-phase rectification waveform current 200A, and three-phase rectification waveform current 200A. The current source is a current generator used to achieve current climbing, and its current waveform covers all waveforms of type B residual current. The device provides a test interface for circuit breakers and charging piles, and can control the closing and opening of charging piles. The device can generate currents of various waveforms, including various waveforms of type B residual current, compatible with the residual current test requirements of circuit breakers and charging piles, and can achieve continuous climbing of residual current for testing type B and below residual current tripping currents, and achieve sudden increase of residual current for testing type B and below residual current tripping time. The test is monitored through the control of the upper computer software, and the test results can be automatically recorded and stored, which can achieve full coverage of the test content of type B residual current action characteristics of circuit breakers and charging piles. ,

[0015] Further improvements, such as Figure 2 As shown: the current enabling circuit includes a circuit breaker loop current enabling switch and a charging pile loop current enabling switch.

[0016] Further improvements, such as Figure 2 As shown: the polarity setting circuit includes a non-polarity switch, a negative polarity switch and a positive polarity switch.

[0017] Further improvements, such as Figure 1 As shown: the main control module 3 includes a start button 9, a control circuit power switch 4, a control circuit power indicator light 5, a main control power indicator light 6, a main control switch 7 and a three-phase voltmeter 8. This setting is convenient for external operation and control and understanding of the equipment operation status.

[0018] Further improvements, such as Figure 1 As shown: the main control module 3 also includes a USB interface 10 and a reserved socket 11, which is convenient for connecting with external devices.

[0019] Further improvements, such as Figure 1 As shown: the bottom of the body 1 is provided with a plurality of heat dissipation holes 16 which are evenly spaced and distributed, and this arrangement facilitates heat dissipation.

[0020] Working principle: The input voltage is three-phase voltage, KM101 is used to control voltage enable, KM110 is used to short-circuit the test product for current pre-passing, KM102, KM103, KM104 are used to select the phase line to which the current is applied, KM105 and KM106 are used to control the current direction, KM109 is used to select AC current when it is turned on, KM107 and KM108 are used to select the current to flow through the circuit breaker circuit or the charging pile circuit. Resistor R is an adjustable resistor. Under the condition of a certain input voltage, the desired current value can be obtained by adjusting resistor R. The current waveforms that can be generated by this resistance circuit include AC current, half-wave rectified waveform current, two-phase rectified waveform current, and three-phase rectified waveform current. The current values ​​that can be achieved include AC current 500A, half-wave rectified waveform current 350A, two-phase rectified waveform current 200A, and three-phase rectified waveform current 200A. The current source is a current generator used to achieve current climbing, and its current waveform covers all waveforms of type B residual current. The device provides test interfaces for circuit breakers and charging piles, and can control the closing and opening of charging piles. The device can generate currents of various waveforms, including various waveforms of type B residual current, and is compatible with the residual current test requirements of circuit breakers and charging piles. It can achieve continuous current climbing, which is used for testing the tripping current of type B and below residual currents, and achieves sudden increase of current, which is used for testing the tripping time of type B and below residual currents. The test is monitored through the control of the upper computer software, and the test results can be automatically recorded and stored, which can achieve full coverage of the test content of type B residual current action characteristics of circuit breakers and charging piles. Application in new energy and other fields can realize real-time monitoring and analysis of energy consumption, formulate more scientific and reasonable energy-saving plans, improve energy utilization efficiency, reduce energy waste, and effectively achieve energy conservation and environmental protection.

[0021] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0022] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A residual current test device with wide range output, characterized in that: include: A machine body (1), wherein a main control unit is arranged inside the machine body (1), and the main control unit includes a current source, a personal terminal and a 500A main control part, the main control unit is connected to a charging pile test port and a circuit breaker test port, the charging pile test port and the circuit breaker test port are connected to a current enabling circuit, a polarity setting circuit, a waveform setting circuit, a pre-on selection circuit and a voltage enabling circuit, a touch screen (2) is arranged on the surface of the machine body (1), and a main control module (3) is arranged below the touch screen (2), the touch screen (2) and the main control module (3) are connected to the main control unit, and a circuit breaker test module (12) and a charging pile test module (13) are arranged below the main control module (3). The invention relates to a module (13), wherein the circuit breaker test module (12) is connected to the circuit breaker test port, the charging pile test module (13) is connected to the charging pile test port, the charging pile test module (13) comprises an industrial socket port (17), a panel socket port (14) and a charging pile socket port (15), a circuit breaker (18) for testing is installed on the surface of the body (1), the circuit breaker (18) comprises an outer shell (1), a display module (27) is arranged on the surface of the outer shell (19), and the display module (27) is connected to the test circuit, an indicator light (28) is arranged on one side of the display module (27), and the display module (27) ) is provided with a control button (29) on the side thereof and the control button (29) is connected to the test circuit; a plurality of groups of heat dissipation holes (20) are provided on both sides of the outer shell (19) and the heat dissipation holes (20) are distributed at equal intervals; an upper wiring port (31) is provided at the upper end of the outer shell (19) and a lower wiring port (23) is provided at the lower part; the upper wiring port (31) is a voltage input terminal and the lower interface is a connection terminal for a circuit breaker test port and a charging pile test port; fasteners (24) are provided on the sides of the upper wiring port (31) and the lower wiring port (23); fixing grooves (26) are provided at the upper and lower ends of the outer shell (19) and the fixing grooves (26) are provided inside A fixing hole is provided, a buzzer (30) is provided on the surface of the outer shell (19), and the buzzer (30) is electrically connected to the test circuit, a buffer pad (25) is provided on the back of the outer shell (19), and the buffer pad (25) and the fixing hole correspond to each other, an adjustment hole (21) is provided inside the outer shell (19), and the adjustment block (22) is located inside the adjustment block (22), a movable plate matching the heat dissipation hole (20) is connected to the side of the adjustment block (22), and a through hole corresponding to the heat dissipation hole (20) is provided inside the movable plate, and a communication interface (32) is provided on the side of the upper wiring port (31), and the communication interface (32) is connected to the PC end.

2. The residual current test device with wide output range according to claim 1, characterized in that: The current enabling circuit includes a circuit breaker loop current enabling switch and a charging pile loop current enabling switch.

3. The residual current test device with wide output range according to claim 1, characterized in that: The polarity setting circuit includes a non-polarity switch, a negative polarity switch and a positive polarity switch.

4. The residual current test device with wide output range according to claim 1, characterized in that: The main control module (3) comprises a start button (9), a control circuit power switch (4), a control circuit power indicator light (5), a main control power indicator light (6), a main control switch (7) and a three-phase voltmeter (8).

5. The residual current test device with wide output range according to claim 1, characterized in that: The main control module (3) also includes a USB interface (10) and a reserved socket (11).

6. The residual current test device with wide output range according to claim 1, characterized in that: The bottom of the machine body (1) is provided with a plurality of heat dissipation holes (16) distributed at equal intervals.

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