
Transformer High Voltage Switch Tap Changer Oil Purifier Fyz-20 (1200 LPH)
Product Introduction
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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)
NO. | Tuning Capacitance Range | Sensitivity (PC) (Unbalanced Circuit) | Effective Value Of Allowable Current | |
Unbalanced Circuit | Balance Circuit | |||
1 | 0~25~100pF | 0.02 | 30mA | 0.25A |
2 | 25~100~400pF | 0.04 | 50mA | 0.5A |
3 | 100~400~1500pF | 0.06 | 120mA | 1A |
4 | 400~1500~6000pF | 0.1 | 0.25A | 2A |
5 | 1500~6000~25000pF | 0.2 | 0.5A | 4A |
6 | 0.006~0.025~0.1μF | 0.3 | 1A | 8A |
7 | 0.025~0.1~0.4μF | 0.5 | 2A | 15A |
8 | 0.1~0.4~1.5μF | 1 | 4A | 30A |
9 | 0.4~1.5~6.0μF | 1.5 | 8A | 60A |
10 | 1.5~6.0~25μF | 2.5 | 15A | 120A |
11 | 6.0~25~60μF | 5 | 25A | 200A |
12 | 25~60~250μF | 10 | 50A | 300A |
7R | Resistance | 0.5 | 2A | 15A |
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



We always provide high quality Transformer High Voltage Switch Tap Changer Oil Purifier Fyz-20 (1200 LPH) and services with the concept of integrity and sincere cooperation with every customer. We strictly control quality and price, and strive to deliver low-cost and high-quality products to customers. Welcome new and old customers to call and buy. Our company has advanced production equipment, professional technical personnel and high-quality management team.
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