Present development and production of power transformers with lower losses in addition to replacement of outdated transformers assume regular measurement of losses in both load and no-load regime. These measurements are very demanding especially in the case of on-situ measurements. The complexity of the measurements grows with the size of transformer. This paper presents one typical test of losses measuring in load and no-load regime of power transformer with nominal power of 40 MVA in HPP Perucica.

'Our Intermediate Transformers are purpose-built for high-accuracy Transformer Testing Panels, serving as the critical interface between the variable power source (IVR/VFD) and the Transformer Under Test (TUT). Engineered for extreme flexibility, these units feature multi-tapped windings to provide a wide range of output voltages, allowing for precise No-Load and Load Loss measurements across diverse KVA and voltage classes. ​Designed with a focus on low harmonic distortion and minimal internal losses, they ensure that test results remain untainted by the testing equipment itself. The robust construction is optimized to handle the repetitive inrush currents and short-circuit impedances encountered during routine and type testing procedures.' ​Key Technical Highlights (For your Catalog/Proposal): ​Multi-Tap Flexibility: Multiple primary and secondary taps to match various transformation ratios (Voltage Ratio). ​High Linearity: Designed to operate well below magnetic saturation to maintain a pure sine wave, essential for accurate loss measurement. ​Low Phase Shift: Minimal phase angle error to ensure the accuracy of power factor readings during testing. ​Isolation Security: Provides a high degree of galvanic isolation to protect sensitive metering and PLC equipment within the control panel. ​Thermal Endurance: Optimized for intermittent high-load testing cycles without significant temperature rise.

'LIT INDUSTRIES is a premier manufacturer of high-performance Distribution Transformers (up to 5 MVA, 33kV Class), specifically engineered to meet the rigorous demands of EPC Contractors and utility infrastructure. We specialize in IS 1180 (Level 1, 2, & 3) compliant designs, ensuring your projects meet the latest energy efficiency standards and Bureau of Indian Standards (BIS) mandates. ​Whether you are executing a turnkey substation, a solar power plant, or an industrial township, our transformers provide the perfect balance of Low No-Load Losses and long-term thermal stability. Backed by our SCO (Service, Consultancy, & Outsourcing) model, we don't just supply equipment—we provide end-to-end support including site commissioning, technical documentation for audits, and rapid post-installation service. ​Partner with LIT INDUSTRIES for short lead times, competitive pricing, and transformers that pass every site inspection with zero hassle.'

LIT INDUSTRIES is a leading manufacturer of high-performance Inverter Duty Transformers (IDT) designed specifically for large-scale solar PV plants and wind energy projects. As a trusted partner for EPC contractors and solar power developers across India, we engineer our transformers to withstand the unique harmonics and pulsed wave requirements of modern solar inverters. Our Inverter Duty Transformers are built to ensure seamless power integration from the DC-AC conversion stage to the utility grid, minimizing losses and maximizing ROI for your renewable energy assets. Key Technical Features: Multiple Windings: Designed with split secondary windings to connect multiple inverters to a single transformer, reducing footprint and installation costs. Harmonic Suppression: Specially reinforced insulation and electrostatic shielding to handle high-frequency harmonics generated by solar inverters. High Efficiency: Low-loss core design (CRGO) to meet Star Rating standards and ensure maximum energy yield. Robust Thermal Management: Optimized cooling systems (ONAN/ONAF) to handle peak solar generation hours without overheating. Grid Compliance: Fully compliant with IS and IEC standards, ensuring smooth approval for government and private solar tenders. Why Choose LIT INDUSTRIES for Your Solar Project? We understand the tight timelines of EPC projects. Whether it’s a 1 MW rooftop installation or a multi-megawatt solar park, our Inverter Duty Transformers provide the reliability required for 25-year plant lifecycles. Customization: Tailored voltage ratios (e.g., 11kV/800V, 33kV/600V) to match your specific inverter brand. Proven Track Record: Supplying robust power solutions from our Vadodara-based manufacturing facility to clients nationwide. Testing Excellence: Every unit undergoes rigorous factory acceptance tests (FAT) to ensure zero-defect performance on-site. Applications: Grid-tie Solar Power Plants (Utility-scale) Commercial & Industrial (C&I) Solar Installations Wind Energy Power Conversion Battery Energy Storage Systems (BESS)

A power transformer is the most costly and essential equipment piece of equipment within an electrical substation. As such it is desirable to perform various preventative maintenance activities to ensure the transformer maintains a high level of performance and a long functional life. A power transformer requires various routine maintenance tasks including measurement and testing of different parameters of the transformer. There are two main types of maintenance of transformer. We perform one group on a routine basis (known as preventative maintenance), and the second group on an ad-hoc basis (i.e. as required). That means for getting smooth performance from a transformer we have to perform some maintenance actions on a regular basis.

A booster transformer is used at end of the transmission line to increase the voltage to the desired value. The main function of the booster transformer is to compensate for the voltage drop in transmission when the transmission line is away from the source. A booster transformer is a device that is used to boost the voltage from the low level to the desired level. Construction of booster transformer The booster transformer is consist of primary and secondary windings. The secondary winding of the booster transformer is connected in series with the transmission line whose voltage shall be controlled and the primary of the booster transformer is supplied from the secondary of the regulating transformer.

Furnace transformers supply power to electric furnaces of various types like Arc furnace, Induction arc, Submerged arc, Rectifier duty & Ladle furnace transformers.In order withstand repeated short – circuit conditions and high thermal stress and to be protected from operational voltages resulting from the arc process, these transformers are designed after considering demanding conditions. The furnace transformer supplying power to furnace has to handle extremely high value currents in the order of kAmps depending upon furnace ratings.

If you work in a power plant or power grid station or are familiar with such kind of power generation or power transmission system, you must know the function of the station transformer or auxiliary transformer. I feel obliged to answer this question for those who are a little bit far from this kind of working field. Let it make it easier to understand the station transformer, assuming that you have some basic knowledge about how a power plant or power grid station, or substation works. Any electrical or mechanical device may go out of order at any time. In such a situation you cannot afford a plant shut down due to the failure of any device. Station or auxiliary transformers are invariably used in all Grid Sub-Stations & Power plants. The KVA ratings of station transformers are normally 100 KVA, 33/0.4 kV. It is connected to the 33kV Main /Transfer Bus bar in the Grid substation with required protection & control.

A dry type transformer is defined as a transformer that does not use any liquid as an insulating or cooling medium for its windings or core. Instead, the windings and core are enclosed in a sealed tank that is filled with air or gas under pressure. Dry type transformers are widely used in various industries and applications because of their safety, reliability, and environmental benefits. They can operate in harsh conditions such as high humidity, fire risk, and seismic events without compromising their performance or posing any hazard to people or property.