Esvee Insudtries BTM Layout, Bangalore, Karnataka

We are offering oil sampling bottle will be suitable for collecting oil samples from transformers for dissolved gas analysis. Bottle will be of robust construction such that no damage occurs during frequent transportation of samples from site to laboratory. Oil sampling bottles are mandatory as per is standard to collect the oil sample only in stainless steel bottle under positive pressure to ensure the proper and correct results of dga. Dissolved gas analysis is best diagnostic tools to assess internal condition of the transformer the dga test is to ensure transformer failure such as: failures due to bushing problems failures due to manufacturing problems failures due to external reasons faults due to oltc problems other type of failures.

we are offering field testing kit to determine quality index of trnsformer oils in service. significant advantages for the field testing kit for determining inter facial tension & acidity of transformer oil in service developed by central power research institute. 1. the field test for ift of insulation oil developed by cpri can be used as a simple and effective tools for determining ift. 2. the shape of the indicator spot has been used for classifying oils into different ift ranges. 3. a combination of the shape of a particular oil can be used for determine the ift of the oil at site. 4. the present method is simples and requires inexpensive, commercially available materials. therefore it can be deployed even in substation with poor infrastructure facilities. 5. the fields test ift described above in combination with the acidity kit developed by cpri. can be used to assess the quality index of the oil in service. in the case of transformer where normal maintenance is done periodically, this field test for quality assessment would enable the screening oil sample to be sent for laboratory testing and also would facilitate immediate remedial action to be taken in needful cases. in the case of distribution transformer where normal maintenance procedure is not carried out due to various constraints this field testing kit for quality index will be of great use to assess the quality of oil in services. in short, this field assessment of quality index of insulation oils would go a long way in prolonging life of transformer oil as well that of the transformer in which they are used.

We are offering acidity testing kit. new transformer oils contain practically no acids if properly refined. The acidity test measures the content of acids formed by oxidation. The oxidation products polymerize to form sludge which then precipitates out. Acids react with metals on the surfaces inside the tank and form metallic soaps, another form of sludge. sludging has been found to begin when the acid number reaches or exceeds 0.3, and 0.3 is considered to be the normal service limit. New oil has an acid number of less than 0.05. The acid number (formerly referred to as neutralization number) equals the milligrams of koh (potassium hydroxide) required to neutralize the acid contained in 1 gram of oil. It is questionable whether oil that is deteriorated to the point where its acid number exceeds 0.5 can be put back into lasting good condition by reclamation. it is almost certain that two or more reclamations, spaced 6 months to 1 year apart, would be necessary. it is recommended that an upper limit of 0.3 be used to determine when oil should be reclaimed, as a single reclamation would most probably restore such an oil to very good condition. Oil showing an acid number of 0.15 or larger can be expected to show accelerated acid formation. Tests have been conducted which indicate the acidity is proportional to the amount of oxygen absorbed by the oil. It is estimated that 0.0015 m3/l of oxygen absorbed in oil will cause an acidity of about 0.4 mg of koh, which is the approximate acidity number at which sludging is assumed to start.

Brand Name : ESVEE INDUSTRIES