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Uninterruptable power supplies (UPS) units are basically used in almost all military applications with preferred voltages of 36V DC and 48V DC. In such applications, Float Cum Boost Charger (FCBC) is most commonly used power supply module. Normally, the output voltage obtained from FCBC was used to drive the ULSB MK-II devices which operates on 48V DC. In the present work, the FCBC module has been...
Electrical transformers are very widely used in the Electrical Power sector at frequencies of 50Hz/60Hz. The liquid dielectric used in power transformers for many decades [1] has been mineral oil. Special applications such as Defence and Airborne equipments use silicone fluid as a dielectric coolant because of its higher operating temperatures of about 150°C– 200°C. Of late, natural vegetable seed...
Transformerless single phase photovoltaic inverter has attracted power generation system due to its higher efficiency and low cost. One of the main problems in transformerless single phase photovoltaic inverter is to control leakage current appearing between parasitic capacitor and ground. The leakage current has to be controlled to avoid EMI problem and circuit damage. The main goal of the proposed...
The liquid dielectric used along with solid insulation in transformers and other equipments is the mineral oil and is in wide use for several decades particularly for power frequency applications. The active parts of electrical power transformers are normally immersed in mineral oil which acts as an insulating medium between energised parts of electrical equipment [1,2]. Silicone fluid is used as...
Dielectric liquids used in electrical equipment serve the dual purpose of insulation and cooling. Mineral oil is one such liquid dielectric coolant which is in extensive use in power and distribution transformers. In spite of many advantages, the poor biodegradability of mineral oil results in contamination of soil and water in the event of an accidental spill. In view of this, there have been strong...
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