WZND-35 Vector Analyzer

With the development of the power industry and the promotion and application of microcomputer integrated automation products, the correct wiring of protection circuits and metering circuits directly affects the stability of power system operation and the accuracy of electricity metering, which are two very important aspects of the power system.

Due to the frequent wiring of protective devices and high-voltage metering devices, it is easy to cause incorrect wiring that is not easily detected (especially for the complex wiring of differential protection, sometimes both high and low sides are introduced simultaneously, and there are different connection groups, which are prone to misconnection, and may not cause misoperation or refusal to operate during normal operation, posing a great hidden danger). Our company has timely developed a multifunctional vector analyzer based on on-site testing needs.

This product combines multiple functions and has multiple measurement functions. The main measurement functions are:

Phase meter function - verify the correctness of main transformer differential protection and bus differential;

Electrical parameter tester function - testing necessary parameters of the power system;

Measurement wiring tester function - to detect the three-phase three wire electrical energy measurement wiring inspection;

Harmonic content testing function - on-site testing of harmonic content of voltage and current;

Oscilloscope function - display bar chart, used as a simple oscilloscope to observe the waveform of test signals.

This measuring instrument adopts DSP AC sampling and can simultaneously measure 3 channels of voltage and 6 channels of current analog signals. The instrument pioneered 9-channel vector display on the same screen and has a friendly human-machine dialogue interface; The independently developed handheld structure, made of high-strength engineering plastic, is sturdy and lightweight, easy to use, and greatly facilitates on-site use, making it a reliable assistant for power workers.

Multi channel vector analyzer, protection vector analyzer, multifunctional vector analyzer

1. Three channel voltage, six channel current vector display on the same screen, pioneering in China; The testing of differential protection devices only requires one wiring to complete the drawing of the hexagonal diagram, greatly improving work efficiency; In situations where space is small and wiring is difficult, the double clamp method can be used for multiple measurements to ultimately draw a complete hexagonal diagram.

2. Using clamp type current transformers for wiring, there is no need to disconnect the current circuit, which is safe and convenient.

3. Vector analysis of complex protective devices can be performed to determine if the wiring is correct, and a correct wiring diagram can be provided for comparison.

4. It can perform routine electrical parameter testing and display three-phase voltage, three-phase current, three-phase active power, three-phase apparent power, and three-phase phase angle simultaneously; And it can directly read and convert the voltage amplitude, current amplitude, and power values to the primary side of the transformer.

5. Can perform error wiring inspection for three-phase three wire high-voltage metering devices, analyze and judge 48 types of three-phase three wire wiring, and directly provide analysis results; Investigating and punishing malicious methods of electricity theft that alter metering wiring, effectively avoiding electricity bill losses.

6. It can perform harmonic analysis of the measured signal on site, analyze the content of 2-32nd harmonics, and automatically calculate the total harmonic distortion.

7. Large screen, high brightness color LCD display, fully Chinese character graphical menu and operation prompts for friendly human-machine dialogue, touch silicone buttons for more comfortable operation and better feel, wide temperature LCD with brightness adjustment, suitable for winter and summer seasons.

8. Powered by a large capacity lithium battery, it can work continuously for up to 6 hours.

9. Users can save the test data in the form of records at any time for centralized and unified management, filing, and reference, and can store more than 2000 sets of data.

10. The saved records can be uploaded to the backend management computer for comprehensive analysis and review.

11. Equipped with perpetual calendar and clock functions, it displays the date and time of the testing work in real time.

12. Small size, light weight, easy to use on site.

13. Reserved USB interface, which can be used to replace USB flash drives and other mobile storage devices with instruments.

1. Input characteristics

Number of voltage channels: 3 channels

Voltage measurement range: 0~450V

Voltage display digit: 6 digits

Number of current channels: 6 channels

Current measurement range: 0~6A

Current display digits: 6 digits

Phase measurement range: -180 ° to+180 °

Harmonic analysis frequency: 2-32 times

2. Accuracy

Voltage: ± 0.3%

Current and power: ± 0.5%

Phase angle: ± 3 °

Measurement error of harmonic voltage content: ≤ 0.3%

Measurement error of harmonic current content: ≤ 0.5%

3. Working temperature: -15 ℃~+40 ℃

4. Charging power supply: AC 160V~260V

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

⑵ The input end of the working power supply is subjected to a power frequency of 2KV (effective value) between the casing, and the experiment lasts for 1 minute.

6. Volume: 250mm × 160mm × 60mm

7. Weight: 1.8Kg