Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the leading manufacturers and suppliers of handheld partial discharge tester in China. If you're going to wholesale durable handheld partial discharge tester, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
The Handheld Partial Discharge Tester NRJF211 is a multi-channel instrument based on TEV, US, UHF, and HFCT detection methods. It measures partial discharge activity in electrical equipment, reads discharge amplitude and spectral waveforms, and provides storage and readout functions for both 2D and 3D phase-resolved patterns, enabling accurate assessment of partial discharge conditions in medium and high voltage equipment. The device features a 5.0" TFT touchscreen with Android interface, supports real-time waveform visualization and phase-resolved analysis, and is equipped with a 5 MP camera, RFID, Wi-Fi, Bluetooth, and USB-TypeC for comprehensive field data management. The instrument is manufactured by Refine On (Hebei) Electric Power Technology Co., Ltd.
Product Parameters
|
Category |
Parameter |
Specification |
|
Host |
Number of interfaces |
4 (TEV, US, UHF wireless, HFCT wireless) |
|
Sampling accuracy |
12 bit |
|
|
Synchronization |
Internal / External / Optical |
|
|
TEV |
Frequency range |
3 – 100 MHz |
|
Measuring range |
0 – 60 dB |
|
|
Measurement error |
±2 dB |
|
|
Resolution |
1 dB |
|
|
Max pulses per cycle |
720 |
|
|
Min pulse frequency |
10 Hz |
|
|
Output interface |
Standard SMA |
|
|
Non-Contact US |
Center frequency |
40 kHz |
|
Measuring range |
0.5 µV – 1 mV |
|
|
Resolution |
0.1 µV |
|
|
Accuracy |
±0.1 µV |
|
|
Output interface |
Standard SMA |
|
|
Contact US |
Frequency range |
20 – 300 kHz |
|
Measuring range |
0.1 mV – 1 V |
|
|
Detection sensitivity |
0.1 mV |
|
|
Output impedance |
50 Ω |
|
|
Output interface |
Standard SMA |
|
|
UHF (Optional) |
Frequency range |
300 MHz – 1.5 GHz |
|
Sensitivity |
< -60 dBm |
|
|
Receiving method |
Antenna |
|
|
Transmission |
Coaxial cable |
|
|
Output |
BNC to signal conditioning unit, wireless to host |
|
|
HFCT (Optional) |
Frequency range |
100 kHz – 50 MHz |
|
Measuring range |
-20 – 80 dB |
|
|
Measurement error |
±1 dB |
|
|
Resolution |
1 dB |
|
|
Transfer impedance |
>5 mV/mA @ 10 MHz, 50 Ω |
|
|
Output |
BNC to signal conditioning unit, wireless to host |
|
|
Hardware |
Display |
5.0" TFT LCD, 800×480, touch/keys |
|
Storage |
TF card |
|
|
Audio |
3.5 mm stereo headphone jack |
|
|
Power input |
DC 12V / 2A |
|
|
Extended functions |
USB-TypeC, 5 MP camera, RFID, Wi-Fi, Bluetooth |
|
|
Power |
Internal battery |
4800 mAh, 7.4 V |
|
Operating time |
Approx. 7 hours |
|
|
Charging time |
Approx. 3 hours |
|
|
Dimensions (Host) |
L × W × H |
180 mm × 110 mm × 40 mm |
|
Weight (Host) |
0.85 kg |
|
|
Packaged Dimensions |
L × W × H |
500 mm × 450 mm × 400 mm |
|
Gross Weight |
10 kg |
|
|
Environment |
Operating temperature |
-20°C to +50°C |
|
Storage temperature |
-40°C to +70°C |
|
|
Humidity |
10% – 90% (non-condensing) |
|
|
Altitude |
≤ 3000 m |
Product Advantages
- Four detection methods in one unit: TEV, US, UHF, and HFCT support cross-verification of discharge sources.
- TEV measurement accuracy of ±2 dB across a 0–60 dB range ensures reliable amplitude assessment.
- Ultrasonic sensitivity down to 0.1 µV enables detection of weak acoustic emissions from partial discharges.
- HFCT dynamic range from -20 dB to 80 dB with ±1 dB error allows precise pulse current measurement on grounding lines.
- UHF sensitivity below -60 dBm captures high-frequency electromagnetic signals above 300 MHz, effectively avoiding low-frequency corona interference.
- Data export via Bluetooth or USB to PC software generates inspection reports directly from recorded waveforms and images.
Main Applications
- Switchgear partial discharge detection using TEV and airborne US sensors
- GIS insulation assessment with contact US and UHF sensors
- Transformer and reactor monitoring via HFCT on grounding wires
- Power cable discharge detection using HFCT clamps
- On-site combined acoustic-electrical diagnosis for defect type identification
Related Products
Factory Show
FAQ
Q1: Does the Handheld Partial Discharge Tester NRJF211 support simultaneous measurement on all four channels?
A1: The instrument allows sequential selection of TEV, US, UHF, or HFCT channels. It does not support real-time simultaneous acquisition on all four channels.
Q2: What is the difference between host dimensions and packaged dimensions?
A2: The host dimensions (180×110×40 mm) refer to the handheld unit only, weighing 0.85 kg. The packaged dimensions (500×450×400 mm) and gross weight (10 kg) include the host, all sensors (TEV, US, UHF, HFCT), signal conditioning units, cables, charger, carrying case, and accessories.
Q3: Can the device operate without an external power source in the field?
A3: Yes. The instrument is powered by an internal 4800 mAh battery, providing approximately 7 hours of normal operation after a 3-hour full charge.
Q4: What is the purpose of the external synchronization function?
A4: External synchronization (via wireless transmitter) locks the measurement phase to the test power supply, ensuring stable phase-resolved pattern analysis for accurate discharge identification.
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