Please feel free to reach out to our sales and support teams at the above phone no.
3rd Floor, Ashiana Trade Centre, Adityapur, Jamshedpur - 831013, Jharkhand, INDIA
Established in 1994, Alcalab Pvt.Ltd. Jamshedpur is a leading NABL accredited calibration laboratory providing instrument calibration services to a large base of customers. Alcalab also conduct Electrical Testing of power supply & distribution equipment like Transformer, Motor, Breaker, Relays and so on. Of late, there has been a rising customer demand for testing of Transformer oil used by them. Thus, responding to their requirement, Alcalab has now set up a well-equipped Transformer Oil Testing laboratory at its premises. This newly established Oil Testing Laboratory is presently going through the NABL Accreditation process & fully ready for testing of customer oil sample.
Regular sampling and testing of insulating oil in transformers is a critical part of any preventative maintenance program. By taking a proactive approach based on the condition of the transformer oil, you can:
⚠️ Avoid sudden transformer breakdowns
🔄 Extend transformer life
💡 Ensure reliable performance
Measures the oil’s ability to withstand electrical stress without failure.
Low BDV indicates contamination by water, sediment, or conducting particles.
Measures the DC resistance across a 1 cm³ oil block.
Higher temperature lowers the oil’s resistivity, reducing insulation performance.
Evaluates leakage current and identifies contamination from moisture, resins, varnishes, oxidation products, or foreign particles.
Even minute water content is dangerous, especially at high-stress points.
Accelerates degradation of oil and insulation paper, forming a damaging cycle.
Acids form due to oil oxidation or external contamination.
Maximum safe limit: 0.15 mg KOH/g. Exceeding this indicates the need for oil replacement or treatment.
Measures tension between oil and water (non-mixing liquids).
Low IFT indicates presence of polar contaminants and degradation products.
Good oil IFT: 40–50 dynes/cm.
Determines temperature where oil emits flammable vapors.
A high flash point (>140 °C) is crucial to prevent fire hazards in transformers.
Assesses the oil’s resistance to flow.
Low viscosity ensures smooth circulation, aiding efficient transformer cooling.
Detects solid deposits that block cooling paths and impair transformer performance.
Helps schedule oil filtration or replacement before failures occur.
Evaluates oil purity and contamination.
Not conclusive alone—should be analyzed along with BDV and acidity tests.
The most sensitive test to detect early signs of:
Partial discharge
Overheating
Arcing
Crucial for diagnostic and preventive maintenance.
A proper container is critical to ensure accurate testing results.
Must be:
Made of Aluminum or Stainless Steel
Tightly sealed to prevent leaks and contamination
Clean and dry
Hold at least 1000 mL of oil
⚠️ Note: It is universally accepted that improper sampling causes 99% of bad test results in transformer oil analysis.