Electrical testing device and electrical testing equipment

Abstract

The utility model relates to an electrical testing device and electrical testing equipment, relates to the technical field of electrical testing, and can realize different types of electrical testing. The device comprises a test circuit, a starting circuit and a control panel, a first end of the test circuit is connected with the starting circuit, the starting circuit is connected with the control panel, and the control panel is used for being connected with external electrical equipment; the starting circuit is used for controlling the testing circuit to carry out electrical testing on electrical equipment externally connected with the control panel according to a testing instruction input by a user through the control panel. The electrical test comprises at least two test modes of a generator rotor alternating current impedance test, a ground network resistance test, a mutual inductor characteristic test, an alternating current overvoltage test, a direct current overvoltage test, a direct current resistance test, a cable fault test and a motor stator winding ground fault test.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electrical testing, in particular, to an electrical testing device and an electrical testing equipment. BACKGROUND

[0002] At present, most of the testers are designed to be intelligent, have analysis and calculation functions, and have printing report functions, but each type of tester generally only meets the testing of a single test of electrical equipment, and cannot realize the testing of multiple different aspects of electrical equipment. Moreover, most of the testers need to be manually operated by test personnel, which is complicated and leads to high cost of electrical testing of electrical equipment by the tester. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the problems in the prior art, the present disclosure provides an electrical testing device and an electrical testing equipment.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, the present disclosure provides an electrical testing device, comprising: a test circuit, a starting circuit and a control panel, a first end of the test circuit being connected with the starting circuit, the starting circuit being connected with the control panel, and the control panel being used for external connection of electrical equipment;

[0005] The starting circuit is used for controlling the test circuit to perform electrical testing on the electrical equipment externally connected with the control panel according to a test instruction input by a user through the control panel, and the electrical testing comprises at least two of the following test modes: generator rotor AC impedance test, ground net resistance test, mutual inductor characteristic test, AC overvoltage test, DC overvoltage test, DC resistance test, cable fault test and motor stator winding grounding fault test.

[0006] Optionally, the test circuit comprises an air circuit breaker, an AC contactor, an isolation voltage regulator, an AC / DC conversion switch module, a first current measurement sub-circuit and a second current measurement sub-circuit.

[0007] A first end of the air circuit breaker is connected with the control panel, a second end of the air circuit breaker is connected with the starting circuit and a first end of the AC contactor respectively, a second end of the AC contactor is connected with a first end of the isolation voltage regulator, and a second end of the isolation voltage regulator is connected with a first end of the AC / DC conversion switch module.

[0008] A second end of the AC / DC conversion switch module is connected with a first end of the first current measurement sub-circuit, or a third end of the AC / DC conversion switch module is connected with a first end of the second current measurement sub-circuit.

[0009] Optionally, the first current measurement sub-circuit comprises an intermediate relay, an AC transformer ammeter and an AC transformer, and the first interface of the second end of the AC-DC conversion switch module is connected with the first end of the intermediate relay and the first end of the AC transformer respectively.

[0010] The second end of the intermediate relay is connected with the first end of the AC transformer ammeter, the second end of the AC transformer ammeter is connected with the second end of the AC transformer, and the second end of the AC transformer ammeter is grounded.

[0011] Optionally, the second current measurement sub-circuit comprises a bridge rectifier module, a DC current sensor and a DC shunt ammeter, the first interface of the third end of the AC-DC conversion switch module is connected with the second interface of the bridge rectifier module, and the second interface of the third end of the AC-DC conversion switch module is connected with the fourth interface of the bridge rectifier module.

[0012] The first interface of the bridge rectifier module is connected with the first end of the DC current sensor, and the second end of the DC current sensor is connected with the first end of the DC shunt ammeter.

[0013] Optionally, the contactor switch of the AC contactor in the test circuit, the relay switch of the intermediate relay in the test circuit and the DC current sensor in the test circuit are connected in series.

[0014] The starting circuit comprises a power indicator, a zero indicator, a working indicator, a starting button, a stop button and a limit switch.

[0015] The first end of the power indicator is connected with the first interface of the first end of the AC contactor and the first end of the starting button respectively, and the second end of the power indicator is connected with the second interface of the first end of the AC contactor, the second end of the zero indicator, the second end of the DC current sensor and the second end of the working indicator respectively.

[0016] The second end of the starting button is connected with the first end of the limit switch and the first end of the contactor switch of the AC contactor respectively, the second end of the limit switch is connected with the first end of the zero indicator and the first end of the stop button respectively, and the second end of the stop button is connected with the second end of the contactor switch, the first end of the contactor coil of the AC contactor and the first end of the working indicator respectively.

[0017] Optionally, the test circuit further comprises a power module, the power module comprises a direct current power module and an alternating current power module, the direct current power module is used for supplying power to a first current measurement sub-circuit in the test circuit, and the alternating current power module is used for supplying power to a second current measurement sub-circuit in the test circuit.

[0018] Optionally, the control panel comprises a display interface, a power socket, and a control interface.

[0019] The display interface is used for displaying a power type, a power state, a voltage state, and an indicator light state when the test circuit performs electrical testing on the electrical equipment.

[0020] The power socket comprises a direct current power socket and an alternating current power socket, the direct current power module is connected to the direct current power socket through a test line, and the alternating current power module is connected to the alternating current power socket through the test line.

[0021] The control interface comprises a start button triggering assembly and a stop button triggering assembly, the start button triggering assembly is used for generating a start instruction according to a triggering operation of a user, and the stop button triggering assembly is used for generating a stop instruction according to a triggering operation of the user.

[0022] Optionally, the control panel comprises one of a touch screen and a liquid crystal display.

[0023] Optionally, the control panel comprises one of a touch screen and a liquid crystal display.

[0024] In a second aspect, the present disclosure provides an electrical testing device comprising the electrical testing apparatus of the first aspect.

[0025] Through the above technical solution, the start circuit in the electrical testing apparatus controls the test circuit to perform different types of electrical testing on the electrical equipment connected to the control panel according to the test instruction input by the user through the control panel. By integrating various test types through one test principle, the functionality reduces the purchase cost of the tester, the structure of the electrical testing apparatus is simple, the testing process is simple and effective, and the electrical testing apparatus is easy to use and test for the tester, thereby effectively improving the work efficiency.

[0026] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0028] Figure 1 is a block diagram of an electrical test device according to an exemplary embodiment of the present disclosure.

[0029] Figure 2 is a circuit diagram of an electrical test device according to an exemplary embodiment of the present disclosure.

[0030] Figure 3 is a schematic diagram of a control panel according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0032] Figure 1 is a block diagram of an electrical test device according to an exemplary embodiment of the present disclosure. As shown in Figure 1 , the electrical test device can include a test circuit 1, a starting circuit 2, and a control panel 3, the first end of the test circuit 1 is connected with the starting circuit 2, the starting circuit 2 is connected with the control panel 3, and the control panel 3 is used for external electrical equipment connection.

[0033] The starting circuit 2 is used for controlling the test circuit 1 to perform electrical test on the electrical equipment connected with the control panel 3 according to the test instruction input by the user through the control panel 3, and the electrical test includes at least two of the following test modes: generator rotor AC impedance test, ground network resistance test, transformer characteristic test, AC overvoltage test, DC overvoltage test, DC resistance test, cable fault test, and motor stator winding ground fault test.

[0034] It is worth noting that the types of electrical tests in the embodiments of the present disclosure include but are not limited to the following: generator rotor AC impedance test, ground network resistance test, transformer characteristic test, AC overvoltage test, DC overvoltage test, DC resistance test, cable fault test, and motor stator winding ground fault test. New test types can be added based on test requirements, and the present disclosure does not limit this.

[0035] It is worth noting that the test circuit 1 and the starting circuit 2 in the electrical test device can be installed inside the box, and the control panel 3 can be arranged on the surface of the box, so as to facilitate carrying the electrical test device, and the control panel arranged on the surface of the box can facilitate the user to operate on the control panel and monitor different types of electrical test processes through the control panel.

[0036] In the embodiment of the present disclosure, the starting circuit in the electrical test device controls the test circuit to perform different types of electrical tests on the electrical equipment connected to the control panel according to the test instruction input by the user through the control panel. By integrating various test types through a test principle, the functionality reduces the purchase cost of the tester, the structure of the electrical test device is simple, the test process is simple and effective, and it is beneficial for the use and test of the test personnel, effectively improving the work efficiency.

[0037] In order to make the person skilled in the art more understand the electrical test device provided by the present disclosure, the electrical test device is described in detail below.

[0038] In a feasible embodiment, as shown in Figure 2 The test circuit 1 includes an air circuit breaker DZ, an AC contactor KM, an isolation voltage regulator TB, an AC / DC conversion switch module K, a first current measurement sub-circuit 11, and a second current measurement sub-circuit 12.

[0039] The first end of the air circuit breaker DZ is connected to the control panel 3, and the second end of the air circuit breaker DZ is connected to the starting circuit 2 and the first end of the AC contactor KM, respectively. The second end of the AC contactor KM is connected to the first end of the isolation voltage regulator TB, and the second end of the isolation voltage regulator TB is connected to the first end of the AC / DC conversion switch module K.

[0040] The second end of the AC / DC conversion switch module K is connected to the first end of the first current measurement sub-circuit 11, or the third end of the AC / DC conversion switch module K is connected to the first end of the second current measurement sub-circuit 12.

[0041] In a feasible embodiment, as shown in Figure 2 The first current measurement sub-circuit 11 includes an intermediate relay KA, an AC transformer ammeter A1, and an AC transformer TA. The first interface of the second end of the AC / DC conversion switch module K is connected to the first end of the intermediate relay KA and the first end of the AC transformer TA, respectively.

[0042] The second end of the intermediate relay KA is connected to the first end of the AC transformer ammeter A1, the second end of the AC transformer ammeter A1 is connected to the second end of the AC transformer TA, and the second end of the AC transformer ammeter A1 is grounded.

[0043] In a feasible embodiment, as shown in Figure 2As shown, the second current measurement sub-circuit 12 comprises a bridge rectifier module D, a direct current sensor TD and a direct current shunt ammeter A2, the first interface of the third end of the AC-DC conversion switch module K is connected with the second interface of the bridge rectifier module D, and the second interface of the third end of the AC-DC conversion switch module K is connected with the fourth interface of the bridge rectifier module D.

[0044] The first interface of the bridge rectifier module D is connected with the first end of the direct current sensor TD, and the second end of the direct current sensor TD is connected with the first end of the direct current shunt ammeter A2.

[0045] In a feasible implementation, as shown in the figure, Figure 2 As shown, the contactor switch of the AC contactor KM in the test circuit 1, the relay switch of the intermediate relay KA in the test circuit 1 and the direct current sensor TD in the test circuit 1 are connected in series.

[0046] The starting circuit 2 comprises a power supply indicator light LD, a zero indicator light XD, a working indicator light HD, a starting button HN, a stopping button TN and a limit switch SQ.

[0047] The first end of the power supply indicator light LD is connected with the first interface of the first end of the AC contactor KM and the first end of the starting button HN respectively, and the second end of the power supply indicator light LD is connected with the second interface of the first end of the AC contactor KM, the second end of the zero indicator light XD, the second end of the direct current sensor TD and the second end of the working indicator light HD respectively.

[0048] The second end of the starting button HN is connected with the first end of the limit switch SQ and the first end of the contactor switch KM of the AC contactor respectively, the second end of the limit switch SQ is connected with the first end of the zero indicator light XD and the first end of the stopping button TN respectively, and the second end of the stopping button TN is connected with the second end of the contactor switch KM, the first end of the contactor coil KM of the AC contactor and the first end of the working indicator light HD respectively.

[0049] In a feasible implementation, as shown in the figure, Figure 2 As shown, the test circuit further comprises a power supply module 4, which comprises a direct current power supply module 41 and an alternating current power supply module 42, the direct current power supply module 41 is used for supplying power for the first current measurement sub-circuit 11 in the test circuit 1, and the alternating current power supply module 42 is used for supplying power for the second current measurement sub-circuit 12 in the test circuit 1.

[0050] It is worth mentioning that the DC power module 41 outputs 0-360V DC, and the AC power module 42 shows 0~250V AC. The DC power module and / or the AC power module meeting the power supply requirements can be replaced according to the test requirements, and the present disclosure does not limit this.

[0051] In a feasible embodiment, as shown in the figure, Figure 3 The control panel 3 includes a display interface, a power socket, and a control interface.

[0052] The display interface is used to display the power type, power state, voltage state, and indicator light state when the test circuit 1 performs electrical tests on electrical equipment.

[0053] The power socket includes a DC power socket and an AC power socket. The DC power module 41 is connected to the DC power socket through the test line, and the AC power module 42 is connected to the AC power socket through the test line.

[0054] The control interface includes a start button trigger component and a stop button trigger component. The start button trigger component is used to generate a start instruction according to the user's trigger operation, and the stop button trigger component is used to generate a stop instruction according to the user's trigger operation.

[0055] In a feasible embodiment, the control panel includes one of a touch screen and a liquid crystal display.

[0056] It is worth mentioning that the DC input jack in the DC power socket on the control panel is connected to the incoming terminal of the air circuit breaker DZ through the test line, and the outgoing terminal of the air circuit breaker DZ is connected to the incoming terminal of the AC contactor KM. When the user triggers the start button trigger component on the control panel, the start button HN in the start circuit 2 is closed, the stop button TN is disconnected, the AC contactor KM is started, and the air circuit breaker DZ power indicator LD is turned on at this time. When the limit switch SQ is in the zero position, the zero indicator XD is turned on; the user triggers the stop button trigger component on the control panel, the stop button TN is turned on, the AC contactor KM is turned on, the outgoing terminal of the AC control contactor KM is connected to the primary incoming terminal of the isolation voltage regulator TB, and the secondary outgoing terminal of the isolation voltage regulator TB is connected to the AC / DC conversion switch K; the DC outgoing terminal of the AC / DC conversion switch K passes through the DC rectifier module D and is connected to the DC output jack in the DC power socket on the control panel through the test line, and the AC outgoing terminal of the AC / DC conversion switch K passes through the AC transformer TA and is connected to the AC output jack in the AC power socket on the control panel through the test line.

[0057] It is worth mentioning that when the various tests of electrical equipment are needed, the DC and AC power supply can be switched according to the test items of the equipment, and the electrical equipment is connected to the DC output socket in the DC power supply socket or the AC output socket in the AC power supply socket through the test line; then the tester is started, and the data of the meter during the test is recorded; according to the calculation formula corresponding to different test types, the test result is converted, and the test result is compared with the standard data to judge whether the tested electrical equipment is qualified.

[0058] The following will explain each type of electrical test:

[0059] For motor rotor AC impedance test:

[0060] Connect the tester AC output socket to the generator rotor collector ring, start the instrument, slowly add AC current and voltage value, and record the voltage value of AC voltage table V1 and the current value of AC transformer current table A1 during slowly returning to zero value. The AC impedance is obtained by the calculation formula Z=U / I, and the AC impedance is compared with the standard AC impedance. According to the comparison result, it is judged whether the motor rotor AC impedance is abnormal.

[0061] For ground net resistance test:

[0062] Connect the tester AC output socket to the ground electrode and the ground probe to connect the AC current to the ground, calculate the potential difference RX=U / I between the two points, compare the potential difference with the potential difference, and according to the comparison result, it is judged whether the ground net resistance is abnormal.

[0063] For mutual inductor characteristic test:

[0064] Connect the tester DC output socket to the secondary winding of the mutual inductor, start the tester, slowly raise the voltage, observe whether the voltage table and the current table are raised, find out the inflection point current, and determine the saturation region of the mutual inductor according to the comparison result of the inflection point current and the characteristic current.

[0065] For AC overvoltage test:

[0066] Connect the tester AC output socket to the equipment using AC voltage, start the tester, slowly adjust the voltage adjusting disc to observe the voltage of AC voltage table V1, until the AC voltage meets the equipment use. It can realize the low voltage, overvoltage protection verification and power supply test of 0-250V AC voltage regulator.

[0067] For DC overvoltage test:

[0068] Connect the DC output jack of the tester to the equipment using DC voltage, start the tester, slowly adjust the DC voltage to the required value, and observe the voltage of the DC voltmeter V2 until the DC voltage meets the equipment usage requirements. The 0-360V DC voltage regulator can be tested for low voltage and overvoltage protection, and the power supply can be tested.

[0069] For DC resistance test:

[0070] Connect the DC output jack of the tester to the motor stator winding, start the tester, slowly add DC current and voltage value, record the voltage value of the AC voltmeter V2 and the current value of the DC transformer ammeter A2, calculate the DC impedance by the formula R=U / I, and determine whether the DC resistance is abnormal according to the comparison result of the DC impedance and the standard DC impedance.

[0071] For cable fault test:

[0072] Connect the DC output jack of the tester to the cable fault phase and ground point, start the tester, and use the matching ring current meter to detect the current value flowing in the inductive cable. When there is no current in the ring current meter, the fault point position can be determined.

[0073] For motor stator winding ground fault test:

[0074] Connect the AC output jack of the tester to the motor and generator fault ground winding, start the tester, slowly add AC current, observe the voltage value of the AC voltmeter V1 and the current value of the AC transformer ammeter A1, and use the matching open transformer to find the ground fault point.

[0075] In a feasible implementation, a pre-warning module is further included, which is connected with the control panel 3 and used for pre-warning when the electrical test result of the electrical equipment is abnormal.

[0076] As can be seen from the above, the test types are integrated in one electrical test device, so that multiple testers do not need to be purchased, thereby reducing the cost of purchasing instruments. The electrical test device is easy to operate, which is beneficial to the use and test of personnel, improves the work efficiency, reduces the personnel technical training and data analysis time and cost, and promotes the quality detection of electrical equipment.

[0077] Based on the same concept, the disclosure further provides an electrical test device including the above electrical test device.

[0078] It should be understood that the electrical test device can be a tester, and the disclosure does not limit this.

[0079] In the embodiments of the present disclosure, the starting circuit in the electrical test device controls the test circuit to perform different types of electrical tests on the electrical equipment connected to the control panel according to the test instruction input by the user through the control panel. By integrating various test types through one test principle, the test instrument purchase cost is reduced in functionality, the electrical test device has a simple structure, the test process is simple and effective, and the test personnel is facilitated in use and test, and the work efficiency is effectively improved.

[0080] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0081] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0082] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. An electrical testing device, characterized in that, include: The test circuit (1), the start circuit (2), and the control panel (3) are provided. The first end of the test circuit (1) is connected to the start circuit (2), the start circuit (2) is connected to the control panel (3), and the control panel (3) is used for connecting external electrical equipment. The starting circuit (2) is used to control the test circuit (1) to perform electrical tests on the electrical equipment connected to the control panel (3) according to the test instructions input by the user through the control panel (3). The electrical tests include at least two of the following test methods: generator rotor AC impedance test, ground grid resistance test, transformer characteristic test, AC overvoltage test, DC overvoltage test, DC resistance test, cable fault test, and motor stator winding grounding fault test.

2. The electrical testing device according to claim 1, characterized in that, The test circuit (1) includes an air circuit breaker, an AC contactor, an isolation voltage regulator, an AC / DC conversion switch module, a first current measurement sub-circuit (11), and a second current measurement sub-circuit (12). The first end of the air circuit breaker is connected to the control panel (3), the second end of the air circuit breaker is connected to the starting circuit (2) and the first end of the AC contactor respectively, the second end of the AC contactor is connected to the first end of the isolation voltage regulator, and the second end of the isolation voltage regulator is connected to the first end of the AC-DC conversion switch module; The second end of the AC / DC conversion switch module is connected to the first end of the first current measurement sub-circuit (11), or the third end of the AC / DC conversion switch module is connected to the first end of the second current measurement sub-circuit (12).

3. The electrical testing device according to claim 2, characterized in that, The first current measuring sub-circuit (11) includes an intermediate relay, an AC transformer ammeter, and an AC transformer. The first interface of the second end of the AC / DC conversion switch module is connected to the first end of the intermediate relay and the first end of the AC transformer, respectively. The second terminal of the intermediate relay is connected to the first terminal of the AC transformer ammeter, the second terminal of the AC transformer ammeter is connected to the second terminal of the AC current transformer, and the second terminal of the AC transformer ammeter is grounded.

4. The electrical testing device according to claim 2, characterized in that, The second current measurement sub-circuit (12) includes a bridge rectifier module, a DC current sensor and a DC shunt ammeter. The first interface of the third end of the AC / DC conversion switch module is connected to the second interface of the bridge rectifier module, and the second interface of the third end of the AC / DC conversion switch module is connected to the fourth interface of the bridge rectifier module. The first interface of the bridge rectifier module is connected to the first end of the DC current sensor, and the second end of the DC current sensor is connected to the first end of the DC shunt ammeter.

5. The electrical testing apparatus according to any one of claims 1-4, characterized in that, The contactor switch of the AC contactor in the test circuit (1), the relay switch of the intermediate relay in the test circuit (1), and the DC current sensor in the test circuit (1) are connected in series. The starting circuit (2) includes a power indicator light, a zero position indicator light, a working indicator light, a start button, a stop button, and a limit switch; The first end of the power indicator light is connected to the first interface of the first end of the AC contactor and the first end of the start button, respectively. The second end of the power indicator light is connected to the second interface of the first end of the AC contactor, the second end of the zero position indicator light, the second end of the DC current sensor and the second end of the working indicator light, respectively. The second end of the start button is connected to the first end of the limit switch and the first end of the contactor switch of the AC contactor. The second end of the limit switch is connected to the first end of the zero position indicator and the first end of the stop button. The second end of the stop button is connected to the second end of the contactor switch, the first end of the contactor coil of the AC contactor, and the first end of the working indicator.

6. The electrical testing apparatus according to any one of claims 1-4, characterized in that, The test circuit also includes a power supply module (4), which includes a DC power supply module (41) and an AC power supply module (42). The DC power supply module (41) is used to supply power to the first current measurement sub-circuit (11) in the test circuit (1), and the AC power supply module (42) is used to supply power to the second current measurement sub-circuit (12) in the test circuit (1).

7. The electrical testing apparatus according to claim 6, characterized in that, The control panel (3) includes a display interface, a power socket, and a control interface; The display interface is used to display the power supply type, power supply status, voltage status and indicator light status when the test circuit (1) performs electrical tests on the electrical equipment. The power socket includes a DC power socket and an AC power socket. The DC power module (41) is connected to the DC power socket via a test lead, and the AC power module (42) is connected to the AC power socket via the test lead. The control interface includes a start button trigger component and a stop button trigger component. The start button trigger component is used to generate a start command based on the user's trigger operation, and the stop button trigger component is used to generate a stop command based on the user's trigger operation.

8. The electrical testing apparatus according to claim 6, characterized in that, The control panel includes either a touch screen or an LCD screen.

9. The electrical testing apparatus according to any one of claims 1-4, characterized in that, It also includes an early warning module, which is connected to the control panel (3) and is used to issue an early warning when the electrical test results of the electrical equipment are abnormal.

10. An electrical testing device, characterized in that, Includes the electrical testing apparatus according to any one of claims 1-9.

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