FAQs – 250 KVA Power Transformer
What is a 250 kVA Power/Distribution Transformer?
A 250 kVA transformer is an electrical device rated at 250 kilovolt‑amperes, used for stepping up or stepping down voltage in a power distribution network. It ensures that high‑voltage supply is converted to usable low‑voltage supply for commercial or industrial loads safely and efficiently.
Where is a 250 kVA transformer typically used?
This transformer is commonly used in industries, manufacturing plants, commercial complexes, large offices, hospitals, or as part of a distribution substation where medium voltage needs to be converted to low voltage for equipment operation.
What are the key features and specifications of a 250 kVA transformer?
Key features include high efficiency, low losses, robust core and winding design, voltage regulation (e.g., 11 kV/415 V), oil or dry-type cooling, standard vector groups (Dyn11), and compliance with relevant electrical standards.
How should a 250 kVA transformer be selected and maintained?
Selection should consider rated capacity (250 kVA), input/output voltage, load demand, ambient conditions, and cooling type. Maintenance includes inspecting connections, checking cooling medium (for oil-filled types), monitoring temperature rise, and avoiding overload to ensure long service life.
What load can a 250 kVA transformer handle and can it be overloaded?
The transformer is rated for 250 kVA, roughly equivalent to 225 kW at 0.9 power factor. Overloading beyond rated capacity may cause overheating, higher losses, and reduced lifespan, so it should be avoided.
