Advanced Core Technology for Minimum Line Loss
The iron core is the heart of a distribution transformer's efficiency. STELLAR utilizes either high-permeability grain-oriented silicon steel or cutting-edge amorphous alloy strips, configured in an optimized multi-limb core structure (such as a three-phase five-limb design). This highly rational structure minimizes magnetic flux leakage, drastically reducing no-load losses and idling currents. By cutting down stray losses, the transformer helps EPCs and facility owners achieve rapid ROI through long-term energy savings.
Robust Mechanical Framework
To ensure operational longevity, the internal active part (core and coils) is secured using a precision-bent thin-plate frame structure. The coils are meticulously clamped to withstand severe electro-dynamic forces during sudden short-circuit events. Despite its high mechanical strength, the overall assembly remains lightweight and compact, easing site installation constraints.
Optimized Thermal Management
Heat dissipation is expertly managed through smooth, unobstructed internal oil channels. Operating on the ONAN (Oil Natural Air Natural) cooling principle, the transformer efficiently transfers heat from the core and windings to the corrugated tank or radiator fins. This passive cooling system contains no moving parts, ensuring silent operation and eliminating the risk of fan failures, which is vital for installations in quiet residential or commercial zones.
Versatile Vector Configurations
Understanding that different grids have varying requirements for neutral grounding and harmonic suppression, this transformer supports multiple connection groups, including Dyn11, Yyn0, and Yzn11. The Dyn11 configuration is particularly favored in modern networks for its superior ability to filter out third harmonics and stabilize phase voltages under unbalanced loads.
Flexible Tapping & Regulation
Voltage fluctuations in the primary 10kV (or 6kV) network are seamlessly managed via flexible tapping ranges (±5%, ±2x2.5%, or ±3x2.5%). Depending on the project's real-time voltage regulation needs, STELLAR offers both off-load (OCTC) and on-load tap changer (OLTC) mechanisms, ensuring stable 0.4kV output to downstream sensitive loads.
