Example of Our Services

Infrared Thermographic Scanning
Infrared Scanner measures the surface temperature of objects and gives fast and valuable answers to questions about the operating condition without requiring a shutdown. It is a non-contact mean of identifying electrical components that are hotter than they should be – often an indication of areas of impending power failure.

Partial Discharge Measurement
The partial discharge measurement uses multiple sensors to accurately detect the presence of partial discharge. The sensors used include,

• transient earth voltage type,
• airborne ultrasonic type,
• contact ultrasonic type,
• HF CT of frequency range 3 to 30 Mhz,
• VHF CT of frequency range 30 to 300 MHz,
• UHF CT of frequency range 300 to 3000 MHz,
• UHF antenna type,

Both online and offline PD measurements are available. For offline PD, the voltage source includes both VLF and 50 hertz type.

We use PD equipment from various OEM, such as from Omicron, Doble Enginering, Qualitrol, IRIS Power, EA technology, HVPD, PDS, B2 and IPEC. We continue to invest in more PD equiment to better detect partial discharge

Transformer Oil Dissolved Gas Analysis
With a laboratory analysis report of the oil sample collected from an on-site transformer, we are able to evaluate the quality of the transformer oil. Periodic monitoring of the oil quality enables clients to trend and foresee the rate of oil quality deterioration, and thus allows planning for the next replacement.

Our mobile DGA analysis capability enables instant results on-site. This is extremely useful in case of an emergency where time is of the essence.

How ON Engineers can enhance the life and performance of your assets

• Predict possible problems
• Proven cause-symptom-effect relationships to predict the need for corrective actions
• Assisting in the timing and planning of scheduled repairs and maintenance
• Rectify defects in order to prevent equipment deterioration
• Follow-up with an appropriate maintenance programme
• Reduce downtime by avoiding unplanned shutdown
• Pre-conditioning monitoring able to carry out with no power interruption to the premises
• Cost attractive and effective maintenance approach

Our Condition Monitoring Services include:

• Dissolved Gas Analysis of Transformer Oil
• Ground Grid Measurement
• Infrared Thermography
• Online and Offline Partial Discharge measurement
• RFI Measurement
• SF6 Gas Measurement
• Smoke Particle Measurement
• Ultrasonic Measurement

TECHNICAL ARTICLE LINK

• Detecting Partial Discharge with Ultrasonic Measurement
• On-Line Partial Discharge Measurement on High Voltage Equipment using the Continuous Mode Transient Earth Voltage (TEV) Technique
• The Use of Multiple Sensors for the On-Line Partial Discharge Measurement of High Voltage Electrical Equipment
• On-Line Measurement of Partial Discharge of a 230kV XLPE Cable Termination Using High Frequency CT Sensors
• Dissolved Gas Analysis (DGA) of Mineral Oil Used in Transformer
• The use of multiple sensors, of electrical and non-electrical type, for online PD measurement of cables , transformers, switchgears and motors

Condition Monitoring Case Study (PD Case Study)

For enquiries, kindly contact us at : +65 6795 4666 or : general@onengineers.com.