Current detection device for electrical measuring equipment

Abstract

A current detection device for electrical measuring equipment, belonging to the field of automatic wiring devices, is proposed to address safety hazards caused by excessive manual operation during the detection process. The device comprises a detection platform unit, a sensor unit, a load portion, and the electrical measuring equipment to be tested. The detection platform unit includes several platform current detection signal receiving ports, the sensor unit includes several current transformers, the load portion includes an actual load and a contactor unit, the actual load includes several loads, and the contactor unit includes a controller, several relays, and several contactors. The current detection process can be automatically connected after pre-setting, improving detection efficiency and reducing the chance of equipment damage caused by wiring errors due to excessive wiring procedures.

Description

Technical Field

[0001] The present invention relates to the field of automatic wiring devices, in particular to a current detection device for electric measuring equipment. Background Art

[0002] Testing electrical measuring equipment before it enters the network is an essential and crucial step. Safety, reliability, and accuracy are also crucial indicators that must be ensured. Currently, testing electrical measuring equipment primarily relies on manual testing, which requires manual wiring and changing of cables. Different equipment testing projects require different wiring methods, and multiple electrical measuring devices must be tested simultaneously.

[0003] Disadvantages of existing technology:

[0004] Problems existing in current testing lines include reduced testing accuracy and test failures caused by human operational errors, as well as safety risks in the testing process due to complicated wiring. Summary of the Invention

[0005] In order to overcome the defects of the above-mentioned prior art, the present invention provides a current detection device for electrical measuring equipment, which can solve the safety hazards caused by excessive manual operation during the detection process, and can also improve the automation level and detection efficiency of the detection line for electrical measuring equipment.

[0006] The technical solution adopted in the present invention is:

[0007] A current detection device for an electrical measuring device comprises a detection platform unit, a sensor unit and a load part, wherein the detection platform unit comprises a platform current detection signal receiving port, the sensor unit comprises a current transformer, the load part comprises an actual load and a contactor unit, the actual load comprises a load, and the contactor unit comprises a controller, a relay and a contactor;

[0008] The detection platform unit is connected to the current transformer of the sensor unit through the platform current detection signal receiving port, the current transformer of the sensor unit is connected to the electrical measuring device to be detected through an automatically retractable probe, the output end of the controller in the contactor unit is connected to the input end of the relay, the output end of the relay is connected to the input end of the contactor, one output end of the contactor is connected to the power supply, and the other output end of the contactor is connected to the load in the actual load, and the load is connected to the electrical measuring device to be detected through the automatically retractable probe.

[0009] Furthermore, the detection platform unit is used to detect current and output a signal to the controller.

[0010] Furthermore, the current transformer and the electrical measuring device detect that the platform current detection signal receiving port of the platform unit is connected to the load of the current transformer to obtain detection data.

[0011] Furthermore, the controller is used to control the relay drive circuit; the relay is used to control whether the contactor is turned on; the contactor is used to control the load connection or disconnection;

[0012] Furthermore, the load is a high-power resistor with different rated powers, which is used to cooperate with the detection of electrical measuring equipment with different ranges or different ranges of the same electrical measuring equipment.

[0013] Furthermore, the controller includes a relay drive circuit composed of a single chip, which is used to control the relay contact switch and thus control the on and off of the contactor.

[0014] The beneficial effects of the present invention are:

[0015] 1. The solution provided by this invention can change the current detection link to automatic connection after pre-setting, thereby improving the detection efficiency;

[0016] 2. It can reduce the chance of equipment damage caused by wiring errors due to excessive wiring procedures;

[0017] 3. It can realize the automatic allocation of multiple types and capacities of loads quickly during the detection process, making the detection more precise and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an electrical measuring device current detection device current detection device structure diagram;

[0019] Figure 2 It is an electrical measuring device current detection device relay drive circuit diagram;

[0020] Figure 3 It is a structural block diagram of the load part of the current detection device of an electrical measuring device; DETAILED DESCRIPTION

[0021] A current detection device for an electrical measuring device comprises a detection platform unit, a sensor unit, a load part and an electrical measuring device to be detected, wherein the detection platform unit comprises a platform current detection signal receiving port, the sensor unit comprises a current transformer, the load part comprises an actual load and a contactor unit, the actual load comprises a load, and the contactor unit comprises a controller, a relay and a contactor.

[0022] The detection platform body unit is connected to the current transformer of the sensor unit through the platform body current detection signal receiving port, the current transformer of the sensor unit is connected to the electrical measuring device to be detected through an automatically retractable probe, the connecting branch is connected to the power supply, the output end of the controller in the contactor unit is connected to the input end of the relay, the output end of the relay is connected to the input end of the contactor, the output end of the contactor is connected to the power supply through node 2, and the other output end of the contactor is connected to the load in the actual load, and the load is connected to the electrical measuring device to be detected through node 1.

[0023] The detection platform unit is used to detect current and output the signal to the controller;

[0024] The current transformer is used to avoid manual wiring. The electrical measuring device detects the load of the current transformer by connecting the current detection signal receiving port of the platform unit to obtain detection data.

[0025] The controller is used to control the relay drive circuit;

[0026] The relay is used to control whether the contactor is turned on;

[0027] The contactor is used to control the connection or disconnection of the load;

[0028] The load is used to match the different ranges of electrical measuring equipment or different ranges of the same electrical measuring equipment. By adjusting the load, the system resistance value is changed to achieve the system operating parameters.

[0029] This invention primarily addresses the use of automatic probes for electrical connection during current testing of electrical measuring equipment within a testing line within an electrical measuring equipment testing laboratory. To address the wiring requirements for current testing and the need to change loads when testing measuring equipment with different ranges or different ranges of the same measuring equipment, a device has been designed that automatically adjusts the load, combining multiple probe types with multiple loads for automated testing.

[0030] like Figure 1 , Figure 2 As shown, loads are connected or disconnected by contactors, which are controlled by a controller via relays. Each independent load is pre-installed with a current transformer to avoid manual wiring. The transformer is connected to the signal receiving terminal of the electrical measurement device's detection platform. Specifically, the current detection signal receiving port of the electrical measurement device's detection platform unit is connected to the load of the current transformer to obtain detection data. Adjustments are made based on the current measurement results of the detection platform unit, and the on-off control of the contactor determines which groups of loads are connected or disconnected from the line.

[0031] The method for adjusting according to the result of measuring current of the detection platform body unit is as follows: outputting the result of measuring current to the msp430f5529 single-chip microcomputer, using the msp430f5529 single-chip microcomputer to form and control the relay drive circuit, using the ordinary I / O port of the msp430f5529 single-chip microcomputer to control the triode for controlling the relay switch, the opening and closing of the relay contact determines whether the contactor coil is energized, indirectly controls whether the contactor contact is conductive, and finally completes the load line connection or disconnection.

[0032] This avoids the situation where, when the load is automatically adjusted, current has already flowed through the detected circuit after the load is put into operation, but the transformer has not yet been connected to the load. This avoids damage to the current transformer, reduces the probability of accidents, and improves detection efficiency by increasing the degree of automation in this link.

Claims

1. A current detection device for an electrical measuring device, characterized in that: The device comprises a detection platform unit, a sensor unit and a load part, wherein the detection platform unit comprises a platform current detection signal receiving port, the sensor unit comprises a current transformer, the load part comprises an actual load and a contactor unit, the actual load comprises a load, and the contactor unit comprises a controller, a relay and a contactor; The detection platform unit is connected to the current transformer of the sensor unit through the platform current detection signal receiving port, the current transformer of the sensor unit is connected to the electrical measuring device to be detected through an automatically retractable probe, the output end of the controller in the contactor unit is connected to the input end of the relay, the output end of the relay is connected to the input end of the contactor, one output end of the contactor is connected to the power supply, the other output end of the contactor is connected to a load in the actual load, and the load is connected to the electrical measuring device to be detected through the automatically retractable probe; The detection platform unit is used to detect current and output the signal to the controller; The load is a high-power resistor with different rated powers, which is used to cooperate with the detection of electrical measuring equipment with different ranges or different ranges of the same electrical measuring equipment.

2. The current detection device of an electrical measuring device according to claim 1, characterized in that: The current transformer and the electrical measuring device detect that the platform current detection signal receiving port of the platform unit is connected to the load of the current transformer to obtain detection data.

3. The current detection device of an electrical measuring device according to claim 1, characterized in that: The controller is used to control the relay drive circuit; the relay is used to control whether the contactor is turned on; and the contactor is used to control the connection or disconnection of the load.

4. The current detection device of an electrical measuring device according to claim 1, characterized in that: The controller includes a relay drive circuit composed of a single chip, which is used to control the relay contact switch and thus control the on and off of the contactor.

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