Moisture or Water Content
Neutralization / Total Acidity
OQIN (Oil Quality Index Number)
Dissolved Gas Analysis (DGA)
Flash Point (Pensky-Martens Closed Cup Method)
Powergen and Transformer Oil Division provide laboratory analysis specialized in samples from power generating system, such as transformer and turbine oil.
Transformer form a critical part of our electrical world. Without them we would not be able to transmit and distribute electricity generated at remote power stations. Oil is used as an insulator and coolant in transformer, by monitoring its condition, the transformer’s overall health can be determined. Over time, transformer failures can become costly not only to the utility or owner, but to the consumers as well. We provide routine test package of transformer oil which plays a big role in preventive maintenance program.
Common parameters used in general transformer oil analysis :
Insulating materials within transformers and electrical equipment break down to liberate gases within the unit. The distribution of these gases can be related to the type of electrical fault, and the rate of gas generation can indicate the severity of the fault. The identity of the gases being generated by a particular unit can be very useful information in any preventative maintenance program.
Furan Analysis on transformer oil indicates the degree of degradation of the transformer paper insulation. This is usually done in transformers aging above 15 years. Furan indicates the compounds of carbon and hydrogen. When the furan count is above 2500ppb, it means the transformer is about to fail. Furan Analysis is important in deciding when to discard a transformer unit or retain.
Interfacial tension describes the tension of the interface between two liquids, in this case between water and oil. Mineral transformer oil must feature a certain interfacial tension to prove that it has the conforming quality degree, is clean and free of impurities. This interfacial tension is determined by allowing oil to float on a bowl filled with pure water. As water and oil do not mix, an interface forms between the two liquids. Subsequently, a precision balance is used to determine the force required to break up this interface by means of a special ring.
Turbine lube-oil systems main purpose are to cool bearings, flush contaminants away from rotating parts, prevent leakage of gases, provide hydrostatic lift for shafts and actuating valves in the hydraulic circuit and protect lube-system internals. Turbine oil formulations must handle large temperature fluctuations and the ingression of contaminants such as dirt and water. Monitoring in-service turbine oil condition for deterioration and degradation can significantly extend the life of both the lubricant and the turbine.
Common parameters used in general turbine oil analysis :
The main function of the viscosity check is to find out whether the lubricant used is the correct lubricant (according to viscosity grade), find out whether the viscosity of the lubricant is still suitable for use and to detect the possibility of contamination in the lubricant.
Determining the acid content in the lubricant which can then be used as a benchmark in determining the age / lifetime of the lubricant. The high acid value in the lubricant can be caused by high oxidation or the lubricant is contaminated with fluid with high acid number.
Lubricant serves as a media retaining the process of metal wear due to friction. However, the best lubricant will also occur due to metal wear caused by friction. Wear metal checking aims to determine the metal content in the lubricant in order to draw conclusions about the source of the metal.
Contamination analysis of used oils detects contamination at trace levels or lower. Contaminants tested and tracked include trace metals from engine and machinery parts, which provide vital data on equipment wear and degradation.
The presence of abrasive solid particles in the lubricant cannot be tolerated because these particles will cause further damage to the components. Cleanliness test states the number of particles with a size above a certain size range (in units of microns) per fluid volume (1 or 100 ml). The particle size distribution in the report follows the rules at ISO 4406-99. Solid particles that enter the lubrication system can come from: dirt ingestion, wear particle or corrosion product.
This test indicates the tendency of the lubricant to form foam and the stability of the foam after it is formed. This test is useful for troubleshooting foaming problems on equipment. The foaming problem in the system can originate from mechanical system design, anti-foam additive depletion and / or contamination.