Automatic Oil Insulation Test Set

The Motwane OTS Series is your go-to solution for reliably testing the dielectric strength of insulating oils found in crucial electrical equipment like transformers, capacitors, switchgear, and instrument transformers.
These tests are essential for ensuring that power systems operate safely and are well-maintained.

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The device is a fully automatic microprocessor-based BDV (Breakdown Voltage) tester designed to measure the dielectric strength of insulating oils used in transformers, switchgear, capacitors, and instrument transformers. It helps detect oil degradation due to contaminants like moisture or particles, ensuring safe and reliable operation of high-voltage equipment.
The dielectric strength of insulation oil is typically measured using the oil dielectric breakdown voltage (BDV) testing technique. An oil's dielectric strength indicates its ability to detect electrical stress before degrading and permitting current to pass through. Transformers and other devices that use insulating oil for cooling and electrical insulation must have the BDV testing technique conducted as part of their routine maintenance. A low BDV reading shows the oil might be contaminated with dirt, moisture, or other contaminants, whereas a high value shows the oil is dry, clean, and has good insulating qualities.
BDV tests on insulating oil are commonly used for electrical maintenance technicians, engineers, and specialists in predictive maintenance programs. These BDV test used various feild, including power generation, transmission, and manufacturing, where equipment like transformers, circuit breakers, and tap changers are used.
Periodic BDV testing is vital for insulating oil health because it acts as an early satge of fault system for contamination and degradation. The BDV value directly measures the oil's dielectric strength, which is its ability to withstand electrical stress without breaking down. Over time, insulating oil can lose this crucial property due to the ingress of contaminants, posing a serious risk to the equipment it insulates.
Dual Safety Micro Switches on chamber cover, Zero Start Interlock, Emergency Stop Button, Open Ground Protection, Auto Trip and Reset, IP40 Rated Enclosure, Designed per IEC61010-1:2010 and IEC 61326 EMC standards
ASTM D877 standard still has a place in modern oil testing, though its use has become more specialized. While it has been largely superseded by more sensitive standards like ASTM D1816 for in-service transformer oils, D877 remains a valid and useful test method for specific applications.
The standard ASTM D1816 over D877 for oil diagnostics when you are testing in-service insulating oil from crucial equipment like power transformers. D1816 is a more sensitive and realistic test that better reflects the oil's actual condition within the equipment.
ASTM (American Society for Testing and Materials): Dominant in North America. D1816: Gold standard for in-service transformer oil. It's more sensitive to contaminants due to stirring and its rounded electrodes, which create a more realistic electrical field. D877: Primarily for new, unprocessed oil or for equipment with a uniform electrical field (like circuit breakers). It's less sensitive. IEC (International Electrotechnical Commission): Widely used in Europe and internationally. 60156: The international benchmark for all insulating liquids. Similar to D1816, it uses rounded electrodes but has procedural differences (e.g., fixed electrode gap, faster voltage rise).