Handheld bidirectional station area recognition device

Handheld bidirectional station area recognition deviceProduct Usage

1. The instrument adopts DSP and high-speed quasi synchronous sampling technology for signal detection. During the testing process, the detection of load signals should be obtained from the internal detection unit and analyzed. There is no problem of signal crosstalk between zero and high voltage lines.

2. The instrument uses 50Hz power frequency load signals for power line transmission, without interfering with normal carrier communication or wireless communication work.

3. The product has no distinction between master and slave devices, and the appearance, function, performance, power connection method, and purpose of any instrument * *;

4. The instrument uses a 7-inch color LCD screen with silicone buttons for operation and display, including operation, measurement information, and measurement result display;

5. The instrument does not distinguish between host and extension in appearance, and has host mode and extension mode during operation. The working mode is determined by the internal automatic judgment of the instrument when connected to the power supply. Connecting to a three-phase four wire power supply is the host mode, and connecting to a single-phase power supply is the extension mode;

When the instrument is used for synchronous testing of multiple zones, it should meet the requirements of synchronous testing of no less than 6 zones and the use of complex zones on site. The zone number should be set through the touch screen and ensure that each test zone number is unique.

6. Instruments connected to single-phase power sources can be set to host mode;

7. The extension should act as the initiator and the host as the responder during testing; The extension can switch between host mode and extension mode as needed.

When the instrument is used as a detection branch switch, it has the automatic detection function of current clamp connection, which can meet the automatic connection detection of each branch without manual setting;

The number of branches supported for single machine testing is 3, and when multiple machines are tested in parallel, the total number of branches tested simultaneously should not be less than 12;

9. The touch screen of the instrument should be able to have normal mode and enhanced mode according to the special needs of the site. Normal mode should be used normally, and enhanced mode should be used for testing in case of special circumstances.

10. The instrument can freely select the power access point, not limited to transformer busbars, junction boxes, concentrator terminal blocks, single/three-phase meters, cable transfer boxes, residential power sockets, etc. The instrument can choose single-phase or three-phase power supply according to usage requirements, and select the host and extension modes according to testing requirements and convenience.

◆Handheld bidirectional station area recognition deviceProduct Features

1. The high-power FSK power line carrier communication method has a theoretical communication distance that meets the power supply range of any substation area.

2. The special pulse current emission and detection method ensures that there will be no signal errors due to the proximity of the common high voltage in the adjacent station area.

3. Fast and convenient station area recognition function, initiated by the extension, with a testing time of no more than 6 seconds and a result accuracy rate of 100%; The result display content is simple, clear, and explicit, including the transformer substation area number where the tested user is located and the phase (A phase, B phase, C phase) where the tested meter is located. The display result is intuitive.

4. Branch recognition function accurately identifies the branch of the power supply line in the tested user's area. A single host can detect 3 branches simultaneously, and multiple hosts working simultaneously can expand to 18 branches.

5. Equipped with mutual testing function between substations, multiple hosts can work simultaneously to accurately determine the independence and electrical connection relationship of each tested substation.

6. Equipped with zero and live wire discrimination function, it can display whether the zero and live wire connections are correct and whether there is reverse connection.

7. Equipped with phase sequence discrimination function, it can distinguish whether the phase sequence of ABC is "positive phase sequence" or "negative phase sequence".

8. The current detection adopts flexible pliers (optional 50A pliers meter, 100A pliers meter, 250A pliers meter, and 500A pliers meter).

9. Multiple working modes can be freely selected, with convenient combinations and flexible settings; It has multiple communication methods such as independent power carrier, independent current pulse transmission, and power carrier and current pulse integration.

10. Multi machine working mode, the instrument is not divided into main and sub units, and each device can be set as a main or sub unit; Support three modes: one master multiple points, multiple masters one point, and multiple masters multiple points, which are convenient for users to use and can effectively improve work efficiency.

11. Accurately measuring various electrical parameters such as three-phase voltage, current, active power, phase angle, power factor, frequency, total power, etc., can be used as an electrical parameter tester.

12. The instrument can display the situation of voltage phase loss and automatically give a prompt on the LCD screen.

13. Analysis of power quality in low-voltage power grid. The instrument can accurately measure the 2-51st harmonic of three-phase voltage and 2-51st harmonic of three-phase current, and also measure the total harmonic distortion of each phase voltage and current.

14. Vector graphics display function. The instrument can display the vector relationship diagram of three-phase voltage and three-phase current, which is convenient for checking the misconnection of low-voltage user measuring devices.

15. Simple oscilloscope function. The instrument can display the actual waveform diagrams of three-phase voltage and three-phase current, allowing users to have a clear understanding of the waveform situation of the measured user.

16. The instrument has a self checking function. When some components are damaged due to overvoltage, impact, or other reasons, the instrument should diagnose the faulty part and provide correct prompts.

17. The instrument has the function of automatic identification of neutral and live wires. When the unit is conducting station or branch testing, it will automatically identify whether the neutral and live wires are connected correctly and provide a prompt on the screen

18. Adopting a large screen true color full transparent LCD screen, it is still clear under sunlight. Chinese and graphical display, user-friendly interface, intuitive display, and simple operation.

19. The conductive silicone button operation mode is designed reasonably and easy to operate. It has a long lifespan and high sensitivity, avoiding the possibility of malfunction or poor sensitivity that may affect the normal use of the touch screen after a period of use.

20. The instrument can save the test results of the station area in the form of records, including test date, test time, station transformer number, meter number, and phase.

21. Test records can be copied to the backend management computer through mobile storage devices such as USB drives for centralized management. The data records can be classified and statistically analyzed, making it easier for the marketing department to truly grasp information such as the ownership of each household's station area, phase, branch, etc; Accurately calculate information such as load distribution and line loss rate.

22. In order to ensure the safety of operation, the instrument has multiple protections. The power circuit has independent and quickly replaceable protective components. In device applications, if the wire voltage is mistakenly connected during wiring, the instrument ensures that there is no damage and provides a prompt for the misconnection situation, and the instrument cannot perform testing operations.

◆Technical Specifications

1. Test section in the testing area

Communication method: special load signal transmission, distance: ≥ 5km

Current testing distance: ≥ 5km

• Recognition cycle: ≤ 6 seconds

Test success rate: 100%

• Number of branch recognition: 3 channels per host (expandable to 18 channels in multi host mode)

Clamp type current transformer: 750A/1500A flexible current clamp

50mm caliper (50A/100A/250A/500A) (optional)

2. Electrical parameter measurement section

Voltage: ± 0.2% Current: ± 0.5%

• Power: ± 0.5% Frequency: ± 0.02Hz

• Phase: ± 0.2 °

3. Power quality section

Voltage harmonic measurement frequency: 2-51

• Current harmonic measurement frequency: 2-51

Harmonic voltage content measurement error: ≤ 0.1%

Measurement error of harmonic current content: ≤ 0.2%

4. Working environment

•Working environment temperature: -30 ℃~60 ℃

•Working environment humidity: ≤ 95% RH

•Working voltage: AC220V ± 10%

5. Insulation

⑴ The insulation resistance between the voltage and current input terminals and the casing is ≥ 100M Ω.

⑵ The working power input terminal is subjected to a power frequency of 1.5KV (effective value) between the casing, and the experiment lasts for 1 minute.

6. Weight

•Weight: 1kg

7. Single machine volume

•体积： 25cm×16cm×6cm