PD Solutions Co., Ltd. – Partial Discharge Testing & HV Solutions

PD Solutions engineer performing PD inspection at outdoor substation

About Us

Who We Are

PD Solutions Co., Ltd. is a leader in Partial Discharge (PD) testing in Thailand for both offline and online testing. Using advanced sensors and analyzers along with certified engineers specialized in both MV and HV systems, we are able to provide substantial service to esteemed clients. Equipment we offer PD testing for are Power Cable, AIS & GIS Switchgear, Motor & Generator, and Transformer.

Power Cable AIS & GIS Switchgear Motor & Generator Transformer

Our Expertise

Our company specializes in testing wide ranges of equipment for PD analysis. We have worked with power cables, GIS, transformers, rotating machines, etc. PD training courses are also available.

Education

What is Partial Discharge?

Partial Discharge (PD) is a localized electrical discharge that only partially bridges the insulation (solid, oil, gas etc.) between conductors and which can or cannot occur adjacent to a conductor. (IEC 60270)

A breakdown or discharge at insulation areas that are not connected between conductors. This is a partial deterioration of the insulation system. Generally, PDs are caused by an uneven electric field, heterogeneity or contamination in the insulation. Local electric stress concentration is higher than the critical point which causes PD.

Deterioration in an equipment's insulation allows PD to occur. Using sensors and analyzers to detect PD in equipment allows detection of deterioration before damage would occur.

Why Test for Partial Discharge?

PD activity is an indication of an incipient fault in HV insulation and is widely regarded as the best "early warning" indicator of the deterioration of aged insulation. Early detection helps prevent catastrophic failures and extend equipment lifespan.

When to Test for Partial Discharge?

PD testing should be performed during commissioning of new equipment, as part of routine preventive maintenance schedules, after repair or refurbishment, and whenever abnormal equipment behavior is detected.

What We Offer

Our Services

We offer a wide range of services which are provided for a variety of equipment.

Online PD Testing

Service under normal working conditions without equipment shutdown. No need to isolate the circuit — tests are non-invasive. Sensors include HFCT, UHF, AE, AA, TEV, etc.

Offline PD Testing

Uses standards and technology proven through research to produce reliable data interpretation. Higher sensitivity compared to online testing for precise diagnostics.

PD Monitoring System

Full PD monitoring system running on web-based UI/SCADA alarm. Captures PD trends to failure over time. Can be installed temporarily or permanently.

PD Training

Taught by professional engineers with verified certifications and real-world experience. Guaranteed after-sales service and free training courses for all customers.

Consultation and Support — HVPD field testing at ABB switchgear

Consultation & Support

Expert consultation, customized solutions, and after-sales technical support from planning through execution to follow-up, ensuring the highest level of customer satisfaction.

Our Paperwork

Research & Publications

Our company's commitment extends beyond providing partial discharge testing services; to maintain our competitive advantage, we actively engage in research as well. This dedication has resulted in the publication of original technical papers on partial discharge, authored by our engineering staff.

Consequently, our customers benefit from both exceptional service and our engineers' commitment to developing solutions for complex challenges.

Tools of the Trade

Our Equipment

We provide more than just advanced testing equipment — we deliver the expertise to use it. As both a distributor and an end user, we have the deepest possible knowledge of our equipment.

Hover over each card to see specifications

PD Analyzer / CDRDIMRUS

PD Analyzer / CDR

Capable of both online and offline measurements. Analyze partial discharges in the insulation of HV equipment such as Transformers, Cables, GIS, Rotating Machine, Switchgears, and etc.

No. of Ch.6

Discharge Amp.20 to 100,000 pC

PD Measuring Range100 kHz to 1.5 GHz

Max. Sampling Rate100 MS/s

Applicable SensorsHVCC, HFCT, TEV, UHF PD Line, etc.

OWTS (CPDA-60)DIMRUS

OWTS (CPDA-60)

Offline non-destructive test designed for prompt diagnostics, search and localization of defect locations in insulation based on partial discharge (PD) measurement and analysis to test cable lines.

Max Output Voltage56 Peak 40 RMS

Cable Line Cap. Range0.05 to 10 μF

Freq. of Measured PD0.15 to 50 MHz

DAC Freq. Range20 to 1000 Hz

Tan Delta MeasurementYes

PD UnitDIMRUS

PD Unit

Device used for preliminary measurement and analysis of Transformers, Connecting and Terminal joints, GIS, and other HV equipment.

Acoustic Ch.40 ± 2 kHz / 80 dB

Acoustic Emission Ch.10 to 500 kHz / 80 dB

TEV Ch. / HF Ch.0.1 to 50 MHz / 60 dB

UHF Ch.440 to 1500 MHz / -5 to -70 dBm

AR700DIMRUS

AR700

4 synchronously operating channels to detect and locate defects in the insulation. The device is used for measurement and analysis of Oil/Power Transformer, Connecting and Terminal Joints, GIS, and others.

No. of Ch.4

Acoustic Sensor Freq.30 to 300 kHz

HF Sensor Freq.0.5 to 10 MHz

Measuring Freq. on Ch.3 MHz

HF PD Ch.1

Kronos Spot TesterMonitra (Former HVPD)

Kronos Spot Tester

A 6-channel synchronous, battery powered test device optimized for field portability enabling testing in various equipment such as Cables, Switchgear, Machines, and Transformer.

Analogue Bandwidth50 Hz

Sample Rate100 MS/s

DAC MV 60ONSITE HV SYSTEM

DAC MV 60

On-site testing (up to 42 kVrms), diagnosis by partial discharges and dissipation factor estimation of all types of distribution power cables.

Max Output Voltage2 to 60 kVpeak

Freq. range DAC20 Hz to 800 Hz

PD measuring acc.1 pC

PD localization acc.1.0 m down to 0.1 m

OLPD-186ONSITE HV SYSTEM

OLPD-186

A portable high end Online PD detection system for measurement and analysis of partial discharges. Tests are done in line with IEC 60270 and IEC 62478 suitable for routine testing and diagnostics for assessment of service-aged cables.

PD Ch.3 Independent Channels

Sampling Rate1 GS/s

Freq.0 Hz to 100 MHz

PD localization bandwidth150 kHz to 50 MHz

Mini Cam (Corona Camera)Katroni

Mini Cam (Corona Camera)

Identify gas, pressure, and vacuum leaks, as well as corona, arcing, and partial discharge faults up to 120 meters away. A standalone system for acoustic image measurements and signal analysis.

Effective freq. range2 to 55 kHz (support extensions)

Detection distance0.3 m to 200 m (real test situation)

Thermal Sen. NETD25 mK@30℃

Temp. measurement range-20℃ to 650℃

ICMflexMegger

ICMflex

A versatile instrument for distribution-class cable testing and rotating machine testing as well as other field tasks involving partial discharge detection, loss factor (tan delta) measurements, and PD fault location.

PD input impedance1 kΩ || 50 pF

PD input sensitivity< 150 μV, corresponds to 0.2 pC

Localisation precision1 m + 0.1 % of the cable length