PD Detector

PD Detector is an indispensable high-tech diagnostic tool in modern power equipment status monitoring and preventive maintenance. It captures various physical signals generated by partial discharge (electromagnetic waves, sound waves, transient voltage, pulse current) to achieve early, non-destructive, live detection, localization, and evaluation of internal insulation defects in equipment.

 

TEV measurement

AE measurement

AA,AA1,AA2 measurement

UHF measurement

HFCT measurement

Hardware

Portability: Designed to be lightweight and easy to carry to different on-site locations for testing.

Multi-method integration: Modern high-end inspection instruments typically support multiple detection methods such as UHF, US, TEV, HFCT, etc., to adapt to different equipment and testing requirements.

High sensitivity: Capable of detecting weak partial discharge signals.

Anti-interference capability: Equipped with strong digital signal processing functions (such as filtering, FFT, phase analysis, pulse recognition algorithms, etc.), enabling effective extraction of PD signals from complex on-site noise.

Positioning function: Combines UHF time-difference positioning, ultrasonic (US) acoustic-electric joint positioning, and US amplitude comparison positioning technologies to help determine the location of the discharge source.

Diagnosis and evaluation: Provides discharge intensity (e.g., dB µV, dBm, mV, pC - subject to calibration), phase-resolved partial discharge (PRPD) patterns, pulse sequence maps, and discharge trend charts. These help identify discharge types (internal discharge, surface discharge, corona discharge, etc.) and assess severity.

Data storage and analysis: Records detection data, location information, environmental parameters, etc., and supports transfer to a computer for in-depth analysis, report generation, and historical trend tracking.

Display and human–machine interaction: Equipped with a large LCD screen that intuitively displays measurement results, spectra, and parameters; the user interface is user-friendly.

Battery-powered operation: Supports long-duration field work.

Wireless connectivity: Some models support Bluetooth or Wi-Fi for convenient data transmission and remote control.

Substation: Transformer GIS, Circuit breakers, current/voltage transformers, lightning arresters, busbars, insulators, etc.

Distribution room: medium voltage switchgear (ring main unit, inflatable cabinet, etc.), distribution transformers.

Transmission lines: cable terminations, intermediate joints, overhead line insulators, fittings.

Power plant: generator, exciter, large electric motor.

Industrial users: High voltage electrical equipment in the factory.

Equipment manufacturer: Factory testing, type testing.

Equipment installation and debugging: Pre operation testing.


FAQS

1. What methods are supported in UHV PD testing systems?

UHV PD testing typically uses a multi-physics detection architecture with multi-sensor coordination and multi-channel synchronous analysis:

UHF (Ultra High Frequency) - the primary method for GIS systems

HFCT (High-Frequency Current Transformer) - for cables and grounding circuits

TEV (Transient Earth Voltage) - for switchgear detection

Ultrasonic / AE (Acoustic Emission) - for locating airborne and surface discharges

2. Which power equipment is covered by UHV PD systems?

UHV-grade PD detection systems are generally applied to:

UHV GIS systems (110kV–1000kV GIS)

Extra-high-voltage XLPE transmission cables

Main power transformers (UHV-class large transformers)

High-voltage substations / GIS switchgear assemblies

Reactors and capacitor banks

3. What sensitivity is required for UHV PD detection?

Typical requirements include:

pC-level sensitivity (IEC 60270 equivalent charge)

μV / mV-level weak signal detection capability

UHF detection sensitivity down to around −60 dBm or lower

Stable high SNR (signal-to-noise ratio) output

4. How is strong electromagnetic interference handled on site?

Common interference sources include:

GIS switching transients

High-frequency electromagnetic noise

Ground loop noise

Harmonics from power electronic devices

UHV PD systems typically rely on:

FFT spectral analysis

Adaptive digital filtering

PRPD (Phase-Resolved Partial Discharge patterns)

Pulse pattern recognition algorithms

Multi-channel synchronous noise suppression

5. Does the PD Detector support PD localization?

UHV-level positioning methods include:

UHF Time Difference of Arrival (TDOA)

Dual-sensor ultrasonic differential positioning

Amplitude comparison method

Multi-point GIS inversion algorithms

6. Can PD types be identified?

UHV PD detectors are capable of identifying:

Internal discharge

Surface discharge

Corona discharge

Output analysis typically includes:

PRPD (Phase-Resolved Partial Discharge) patterns

PRPS 3D phase-resolved maps

Discharge trend curves (trend analysis)

7. Does the PD Detector support data management and reporting?

UHV systems generally support:

Multi-project data management (substation / asset-based)

Automatic IEC-style test report generation

Export in PDF / Excel / SCADA formats

Historical trend comparison (condition monitoring)

Cloud or local database storage

8. Does the software meet UHV application requirements?

UHV software platforms typically include:

PRPD automatic recognition algorithms

Multi-channel synchronous correlation analysis

GIS compartment-level analysis models

Noise identification and suppression models

Expert diagnostic systems (AI-assisted analysis)

9. Is the PD Detector suitable for on-site substation testing?

UHV systems are designed with:

Portable or modular structure

Battery operation ≥ 8–12 hours

Single-person operation capability

Strong EMI-resistant design

Support for elevated GIS compartment testing

10. Does PD Detector support wireless and remote expert diagnostics?

Modern UHV PD systems support:

Wi-Fi / Bluetooth connectivity

Real-time data transmission

Remote expert diagnosis

Synchronized App / PC control

11. Does PD Detector comply with international standards?

Relevant standards include:

IEC 60270 (Partial discharge measurement)

IEC 62478 (UHF PD detection methods)

IEC 60071 (Insulation coordination)

IEEE C57 series (transformer-related standards)

12. Does PD Detector support FAT/SAT testing?

UHV systems support:

Factory Acceptance Test (FAT)

Site Acceptance Test (SAT)

Commissioning tests

Condition-based preventive maintenance

13. How is calibration and traceability ensured?

UHV systems provide:

Factory calibration certificates

Traceability to national/international metrology standards

Periodic recalibration support

Software-based automatic compensation and correction

We are a professional PD detector manufacturers in China.We can provide the best professional PD detector for sales and competitive price. If you are looking for PD detector supplier, we are a good choice.

Contact us to get PD detector price.

Hot Tags: pd detector, China pd detector manufacturers, suppliers, factory