Oil Analysis
Laboratory equipped with cutting-edge technology performs fundamental tests to diagnose the quality of the insulating mineral oil, providing the required agility and accuracy, with reliable subsidies for your company to schedule and to plan a stop for maintenance.
Humidity, sludge, acid composites, heating, internal discharges are some problems that can be affecting your transformers. Though periodic analysis of the insulating mineral oil, we can identify risks and deploy projects that avoid wear and tear, extending the useful life of your equipment.
Keep your production up to date: check the quality of your oil at Lorencini Brasil laboratory.
High quality and leading edge technology to perform chromatographic analysis and physical-chemical analysis.
Chromatografic Analysis
It determines the dissolved gas concentration in the insulating mineral oil. The natural aging of the equipment can be solved by eliminating these gases immersed in oil.
The use of bad quality oil causes severe damages to the equipment. Thus, the importance of our prevention work which detects any defect still in the initial stages, from the gases composition and the rapidity with which they are formed.
Lorencini Brasil detects the presence and eliminates:
- Hydrogen (H2)
- Oxygen (O2)
- Nitrogen (N2)
- Carbon monoxide (CO)
- Carbon dioxide (CO2)
- Methane (C4)
- Ethylene (C2H4)
- Ethane (C2H6)
- Acetylene (C2H2)
Physical-chemical analysis
It determines the insulation condition and aging status of the insulating mineral oil. The results are compared with predefined values of the Norms. Values out of the range of specified limits indicate the need of thermo-vacuum treatment, replacement or regeneration of the mineral oil.
Lorencini Brasil performs the following sampling tests with your oil:
- Color: A fast color increase indicates deterioration or oil contamination.
- Dielectric rigidity: It measures the capacity of the oil to support electric tensions and indicates the presence of contaminants such as water and conducting particles.
- Water content: High content of water accelerates the chemical deterioration of the insulating paper and indicates unwanted operating conditions, which require corrections.
- Acidity: Indicates that the oil contains any acid material which besides increasing the oil oxidation and forming sludge, can also promote paper degradation.
- Interfacial Tension: Indicates the presence of polar contaminants which are chemically active substances and, thus, accelerate the oil aging.
- Dielectric loss factor (dissipation factor or power factor): A high loss factor indicates the presence of contaminants or deterioration products, such as humidity, carbon or conducting materials, metallic soaps and oxidation products.
- Furfuraldehyde Analysis: Analyzes the aging condition of the insulating paper, by analyzing dissolved furan derivatives in the insulating mineral oil. It allows to plan the replacement of the transformer based on technical information concerning to aging and not the chronological age of the equipment.
- PCB content analysis: The determination of PCB in non-halogenated insulating liquids is made through two different methods. The potentiometric method is based on the dosage of chloride ions from polychlorinated biphenyl molecules, after a specific reaction. This dosage is indirect and requires attention concerning to procedures suggested by the manufacturers of the utilized equipments. The chromatographic method, for instance, follows the dosage by using standards and comparison of areas in calibration curves.