It also insulates the transformer and allows electrical components to be more compact than free air apparatus. The screen test is a collection of additional physical, electrical and chemical tests, including: dielectric breakdown, power factor, interfacial tension, acidity and color. Transformer testing is done for confirming the specifications and performance of an electrical power transformer. If the oil is fresh, the lowest allowable breakthrough voltage is 30 kV. Electrical and thermal stress or chemical contamination can cause failures and reduced component life. The insulating fluid in a power transformer performs two major functions: Serves as electrical insulation to withstand the high voltages inside the transformer Electronic on-line dissolved gas detectors can be connected to important or distressed transformers to continually monitor gas generation trends. Routine testing of transformer oils and insulating oils on a regular schedule is an accepted industry practice. That means we have the capability and capacity to provide effective, accurate test results quickly. Because it can be define … When the standards and principles stated by ASTM are followed, then it results in good oil. Transformer oil has to be tested to make sure that the performance and efficiency of the transformer are good. MVA is not just an oil laboratory—we are a full service diagnostic company using our expertise and knowledge to help you protect your transformers. From the sampling, we are able to detect the moisture content, power factor, dielectric breakdown, acid number and much more. The ability of insulating oil to maintain its original performance characteristics during long term operation of electric equipment is referred to as “oil stability.” If the electric power equipment has no defects and operates in accordance with design and expectations, the performance characteristics of new oil will change and degrade slower. Transformer Oil Testing Equipment. We have invested in the construction of industry leading infrastructure to allow us to service the full spectrum of requirements including:. It also insulates the transformer and allows electrical components to be more compact than free air apparatus. This early warning system can allow management to identify maintenance priorities, plan work assignment schedules, and order necessary parts and materials. The main physical and chemical properties tested in Transformer Oil Testing Methods are the oil’s dielectric strength, dissipation factor, flashpoint, color, amount of solid particulate matter, water content, gas content and the oil’s acid number. FUNCTION INTRODUCTION 1. The acidity test measures the content of acids formed by oxidation and contaminates. Transformer oil is crucial in the cooling process of a transformer. At Oil check we have the capacity to test oil from an aged transformer whether it be for maintenance, checking for any carry over after an oil change, disposal or refurbishment for such PCBs; ensuring that your equipment is compliant with the European Directive 96/59/EC. ALS performs several tests that allow for proper condition monitoring. A similar process is used to calculate the oil’s “dissipation factor.” It is the the oil’s ability to neutralize energy, prevent breakthroughs and cool the transformer. Normally, arcing occurs only after other problems surface which show up through DGA testing. The transformer is the main part of an electrical distribution system so if it is not working properly then it will affect the distribution system. Diagnostic testing, field maintenance & repairs. Results from such tests help guide planning for future maintenance on a transformer and help determine when replacement of a transformer may become necessary. This test does not measure the water content in the transformer paper insulation. Whenever a transformer undergoes abnormal thermal and electrical stresses, certain gases are produced due to the decomposition of the transformer oil. Over the past five decades we have generated millions of test results from thousands of high-voltage units, and we process samples from transformer owners across the country. Transformer excitation current test : 5 years. Learn More. The breakdown voltage is that voltage at which sustained arcing takes place. RSYJ-80 Insulation Oil Dielectric Strength Tester AC 0~80kV Output Voltage. Specific transformer oil test method availability will vary depending upon location. It is certified to ISO/IEC 17025 standard for chemical and biological testing and is as established as the transformer plant itself, having been in continuous operation for > 30 years. If the arc occurs in the area of cellulose insulation, carbon dioxide and carbon monoxide also will be elevated. There are many benefits to using MIDEL fluids, such as 100% fire safety, environmental friendliness and low maintenance. Our transformer oil testing services offer you a complete solution to your transformer testing needs. Our Transformer Oil Testing lab is NABL accredited. Analytical Testing. This website uses cookies to improve your experience. Great deal about the condition of the transformer oil is mandatory in yearly once for its maintenance transformers! It becomes aggressive against the solid insulation is a proven loss prevention technique which should a. Five decades of data-driven wisdom, methods and analysis is essential in where! Exhibited by poor transparency, cloudiness, or the observation of foreign particles equipment for Load... 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Performance of an electrical power system very light color and complies with performance standards that include breakdown!
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