Two320 Three-Phase Transformer Winding Ohmmeter Transformer Resistance Meter

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HZJF-9041D Four Channels Partial Discharge Detector

Overview

The HZJF-9041D four-channel partial discharge detector is a new type of digital partial discharge detection device developed by our company. While retaining all the advantages of the HZJF-9041 model, this product further reduces its size and optimizes its performance. It replaces the traditional oscilloscope and physical knob operation with a 10.1-inch touchscreen, making it more convenient to use.

This instrument features a fully touchscreen operation design, which not only enhances operational durability but also includes the following functions: one‑click automatic calibration, adjustable high‑voltage test divider ratio, and support for uploading test data via serial communication. The device offers high sensitivity, a wide range of applications, a broad dynamic range of the amplification system, multiple frequency band combinations (nine types in total), and strong anti‑interference capability. It is a practical partial discharge detection instrument widely used by power departments, manufacturing enterprises, and research institutions.

Main Technical Indicators

1. The equivalent capacitance ranges from 6pF to 250 μ F

2. Number of channels: Four channels

3. Measurement range: 0.1pc-10000nc

4. Detection sensitivity and allowable current (see Table 1)

Table 1. Detection sensitivity and allowable current value of input unit

5. Elliptic scan time base

(1) Frequency 50/60, 100, 150, 200, 400Hz

(2) Rotation: 30 ° as the first gear, and can rotate 120 °

(3) Working method: ellipse sine wave straight line

6. Display unit

10.1 inch capacitive touch screen is used.

7. Amplifier

(1) 3dB low frequency fl:10, 20, 40KHz optional

(2) 3dB high frequency fh:80, 200, 300kHz optional

(3) Gain adjustment, rough adjustment 6, inter gear gain difference 20 ± 1dB, fine adjustment range >20db

(4) Asymmetry of positive and negative pulse response ＜ 1dB

8. Time window

(1) Window width: adjustable, 5 ° ~ 170 ° at 50Hz

(2) Window position: each window can rotate 0 ° ~ 170 °

(3) Two time windows can be opened separately or simultaneously.

9. Peak pulse display

The touch screen displays 1 decimal place (10pc or more), 2 decimal places (less than 10pc), error: ± 3% (in full scale)

10. Test voltage display

(1) Range 150kV

(2) Input impedance: >1m Ω

(3) Display: touch screen display, display 1 decimal place

(4) Error: ± 1%

11. Test frequency display

Error: less than ± 1%

12. Zero standard system

Zero sign is consistent with all ellipse scanning frequencies

13. Structure

(1) Dimensions: 370mm (width), 460mm (depth), 215mm (height)

(2) Weight: about 12.5kg

Our company takes the technology as the guiding ideology, under our determined enterprising, pragmatic and innovative common struggle, continuously develops new Two320 Three-Phase Transformer Winding Ohmmeter Transformer Resistance Meter. The company has always paid attention to the cultivation of talents, providing a comfortable and safe working environment and a competitive development channel for employees. Independent innovation is the source of our sustainable development and an important way to enhance our sustainable competitiveness.

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