Integrated Partial Discharge Diagnostic Systems-
High-Sensitivity PD Measurement for Transformers, GIS, Switchgear & Cables
Designed for high-voltage equipment manufacturers, electrical utilities, and field testing teams, our partial discharge testers combine high-speed digital sampling with multi-channel noise cancellation. Accommodating HFCT, UHF, TEV, and airborne ultrasonic sensors, each system measures, analyzes, and localizes insulation defects under strong field interference while adhering to IEC 60060-2 and IEC 60270 standards.
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![Partial Discharge Detector]()
Partial Discharge DetectorOur company's Partial Discharge Detector meets the IEC 60270-2000 standard and can perform precise partial discharge diagnosis of electrical equipment through various dedicated sensors. It can also -
![Handheld Partial Discharge Tester]()
Handheld Partial Discharge TesterModel NRJF211 Handheld Partial Discharge Tester, packaged dimensions 500×450×400 mm, gross weight 10 kg.. Integrates TEV, US, UHF, and HFCT detection methods. -
![Partial Discharge Analyzer]()
Partial Discharge AnalyzerThe NRJF210 Partial Discharge Analyzer is a 4-channel, benchtop instrument for partial discharge measurement, fault location, and online monitoring of high-voltage electrical equipment.. • Compliant
Typical Applications
Transformer & Cable Factory Acceptance Testing
Integrates with high-voltage testing transformers and resonant test systems to verify apparent charge levels down to 1 pC during AC withstand insulation tests.
Live Substation Preventive Maintenance
Detects internal void discharge, surface tracking, and floating electrode discharges in 110 kV to 500 kV GIS and metal-clad switchgear using non-intrusive TEV and UHF sensors without shutting down power lines.
Cable Joint & Termination Fault Localization
Utilizes dual-channel acoustic-electrical time-of-flight (ToF) algorithms to locate discharge points along high-voltage underground cables with positioning accuracy within 0.2 meters.
Technical Specifications
Measurement & Signal Acquisition
|
Parameter |
Specification |
|
Standards Compliance |
IEC 60270, IEC 60060-2, IEEE 400.3, IEEE 1434 |
|
Apparent Charge Range |
0.1 pC to 100,000 pC (Galvanic / HFCT channel) |
|
Measurement Accuracy |
±1% of reading or ±0.5 pC, whichever is greater |
|
Dynamic Range |
Greater than 80 dB across all acquisition channels |
|
Sampling Rate |
100 MS/s high-speed ADC per channel |
|
Vertical Resolution |
14-bit |
|
IEC 60270 Frequency Band |
100 kHz to 500 kHz, selectable bandpass |
|
HFCT Bandwidth |
100 kHz to 50 MHz |
|
UHF Bandwidth |
300 MHz to 1500 MHz |
|
Ultrasonic / AE Bandwidth |
20 kHz to 300 kHz |
Noise Suppression & Pattern Analysis
|
Parameter |
Specification |
|
Interference Rejection |
Hardware-based differential channel gating, dynamic threshold filtering, and frequency-domain notch filtering |
|
Pattern Analysis |
Real-time Phase-Resolved Partial Discharge (PRPD), Phase-Resolved Pulse Sequence (PRPS), and Equivalent Time-Frequency (T-F) mapping |
|
Data Interfaces |
Dual Ethernet, USB 3.0, optical fiber interface for high-voltage isolation |
|
Data Export Formats |
CSV, PDF, XML |
Standards Compliance & Calibration
|
Parameter |
Specification |
|
Calibration Rigor |
Supplied with an IEC 60270-compliant charge calibrator |
|
Selectable Calibrator Pulse Outputs |
1 pC, 5 pC, 10 pC, 50 pC, 100 pC, 500 pC |
|
Pulse Rise Time |
Below 5 ns |
|
Calibration Certificates |
Factory calibration certificates issued under ISO/IEC 17025-accredited procedures |
|
Calibration Traceability |
Traceable to NIST / ILAC-MRA-recognized national laboratories |
|
High-Voltage Coupling Capacitor Rating |
Continuous operation up to 100 kV |
|
Overvoltage Protection |
Internal overvoltage protection circuits |
[SMT Component Assembly] -> [Faraday Cage Isolation Testing] -> [72h Thermal Stress Conditioning (50 Deg C)]
|
[ISO/IEC 17025 Pulse Calibration] <- [High-Voltage Impulse Noise Immunity Test] <-----+
Analog Front-End (AFE): Ultra-low-noise preamplifiers integrated into Faraday-shielded aluminum enclosures to prevent ambient RF coupling.
Signal Isolation: Full optical fiber transmission between high-voltage field sensor nodes and the central display unit, ensuring operator safety under flashover events.
Sensor Construction: UHF sensors built with high-temperature PEEK dielectric windows; HFCT sensors enclosed in split-core nickel-zinc ferrite cores with 50 Ohm impedance matching.
Configuration & Support Options
Standard Package Inclusions
Central Acquisition Unit (IP65 rugged field housing)
Standard Sensor Suite (Choice of HFCT, TEV, UHF, or Airborne Acoustic)
IEC 60270 Calibrated Pulse Generator
Fiber-optic signal cables (10 m standard, 20 m / 50 m optional)
Battery pack (8-hour continuous field operation) and external power adapter
PC Analysis & Report Generator Software (License-free, unlimited workstation installs)
Support & Maintenance
Accessories: External high-voltage coupling capacitors (10 kV, 35 kV, 110 kV ratings), magnetic surface mount acoustic sensors, and directional UHF antennas.
Calibration Support: Open software calibration menu allowing third-party ISO 17025 accredited labs to perform annual re-verifications.
Warranty: 24-month manufacturer warranty with available extended service contracts.
Our Certificate
ISO9001, ISO14001, ISO45001
FAQ
Q: How does the system reject background noise in live substations during HFCT or TEV measurements?
A: The unit combines hardware differential gating with digital phase-filtering algorithms. By using two HFCT sensors or an auxiliary noise-canceling antenna, signals appearing simultaneously across channels with zero phase shift are identified as ambient background noise and filtered out before PRPD pattern mapping.
Q: Is the instrument compliant with IEC 60270 measurement requirements?
A: Yes. The offline PDT-200 series strictly adheres to IEC 60270 standards for apparent charge measurement (pC). It features calibrated bandpass filtering, wideband acquisition modes, and includes a traceable pulse calibrator for system calibration prior to every testing session.
Q: Can the software automatically identify the type of partial discharge defect?
A: The integrated analysis software matches real-time PRPD and PRPS patterns against a database of typical discharge profiles. It provides automated pattern recognition probability for internal gas voids, surface corona, free-moving metallic particles, and fixed point discharges.
Q: What safety measures protect operators during high-voltage flashover events?
A: Signal acquisition units transmit data to the host PC or tablet via fiber-optic cables or isolated wireless protocols. There is no direct galvanic connection between the high-voltage coupling capacitors or sensors and the operator interface panel.
Q: Can the UHF sensors be installed on live GIS systems without gas de-pressurization?
A: Yes. Non-intrusive external UHF sensors mount directly over dielectric inspection windows or barrier insulators on GIS enclosures using heavy-duty magnetic fixtures, eliminating the need to de-gas or open the GIS compartment.
Q: How are test reports exported, and can they be customized to utility standards?
A: Reports can be exported in one click to PDF, CSV, or XML formats. The built-in report manager permits custom logo insertion, site metadata additions, raw waveform graphics embedding, and automated pass/fail assessments matching asset management guidelines.
Request a Quote / Contact Engineering
Need specific sensor configurations, custom fiber cable lengths, or technical data sheets? Submit your application requirements below to receive a technical response and formal quote within 24 hours.
Contact Email: wang@transformer-test.com
Technical Support Line: +8616630291792
Factory Location: Mancheng District, Baoding City, China
[ Request Technical Quotation ] | [ Download Datasheet (PDF) ] | [ Speak to an Application Engineer ]
Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the most reliable partial discharge tester manufacturers and suppliers in China, also supports customized service. Please feel free to wholesale advanced partial discharge tester at competitive price from our factory. Contact us for quotation.
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