II. Product Structure Options for 50 kVA Transformers

To accommodate minimal footprint constraints, single-pole mounting, and diverse environmental requirements, Hengfengyou Electric provides the 50 kVA rating in four primary structural configurations:

• 50 kVA Substation Oil-Immersed Distribution Transformer: Built with a corrugated cooling tank engineered for natural oil convection (ONAN). Highly suited for single-pole mounted utility line installations in rural electrification programs.

• 50 kVA Epoxy Resin Cast Dry-Type Transformer: Flame-retardant, self-extinguishing, and moisture-proof. Specially designed for indoor micro-equipment rooms, control booths, and commercial spaces with strict fire safety requirements.

• 50 kVA Pad-Mounted Transformer Substation: Enclosed in a compact, tamper-proof steel cabinet housing integrated high-voltage load switches and protective fuses. Ideal for urban residential corners and small public facilities.

• 50 kVA Low-Voltage Isolation Transformer: Built for signal isolation, voltage adaptation, and harmonic mitigation in power-sensitive automated machines and precision control setups.

III. Core Technical Advantages & Value Proposition

• Low-Loss Micro-Core Technology: Laminated with high-permeability cold-rolled grain-oriented silicon steel sheets using precision 45-degree full-mitred joints, substantially cutting down no-load power dissipation and operational sound levels.

• High Operational Efficiency & EU Ecodesign Compliance: Delivers operating efficiency above 98.5%, fulfilling European Ecodesign Tier 2 regulations (2015/2014/548/EC) to help operators minimize ongoing electricity overhead.

• Hermetically Sealed Maintenance-Free Tank: Thermal expansion and contraction of insulating oil are naturally absorbed by the corrugated wall elasticity. This airtight seal blocks moisture and atmospheric oxygen, slowing down insulation degradation and eliminating routine oil maintenance over a 25-year design life.

• Strong Thermal Efficiency & Overload Tolerance: Engineered with optimized internal cooling channels and robust winding insulation. Copper winding models can safely sustain temporary short-term overloads up to 150% for up to 2 hours under monitored oil temperature (≤ 95°C).

IV. Price Factors & Industrial Purchasing Considerations

The direct manufacturer price quote for a 50 kVA 10kV/0.4kV oil-immersed transformer depends on raw material market indexes and customer technical parameters.

Primary Price Drivers:

• Winding Conductor Material: Copper windings carry a higher initial investment than aluminum options, but deliver lower load losses, higher mechanical strength during short-circuit conditions, and superior long-term reliability.

• Loss Performance Standard: Standard energy-saving models versus ultra-low loss configurations (such as European Tier 2 standards).

•   Fittings & Auxiliary Accessories: Integration of Buchholz relays, multi-point dial oil thermometers, pressure relief valves, or tap-changer options.

• Global Commodity Metal Prices: Spot market pricing for electrolytic copper cathode and CRGO silicon steel lamination sheets.

Request an Instant 50 kVA Oil-Immersed Transformer Price Quote

V. Frequently Asked Questions (FAQ)

Q1: What is the typical factory lead time for a 50 kVA distribution transformer?
For standard 10kV/0.4kV 50 kVA oil-immersed transformers, our factory manufacturing lead time is typically 15 to 20 days. Because 50 kVA is a standard micro-capacity, standard core materials and corrugated tanks are regularly stocked to accelerate delivery. Customized configurations take approximately 25 to 35 days.

Q2: What warranty coverage and extended plans are available for this 50 kVA transformer?
We supply a 12-month standard warranty starting from the commissioning date (or 18 months from shipment). For rural electrification programs or municipal utility contracts, extended warranty packages up to 5 years are available, backed by rapid technical support and spare parts delivery.

Q3: How does Hengfengyou Electric keep pricing competitive for 50 kVA power transformers?
By manufacturing directly and bypassing intermediate trading agents, we pass material procurement savings straight to buyers. Automated coil winding machines and robotic tank welding processes ensure precise quality control while keeping production overhead low.

Q4: How do you calculate the primary and secondary rated currents for a 50 kVA 10kV/0.4kV transformer? For a standard 10kV to 0.4kV step-down voltage transformation:

• High-Voltage Side (10 kV): Rated Current I1 = 50 kVA / (10 kV × 1.732) = 2.89 A

• Low-Voltage Side (0.4 kV): Rated Current I2 = 50 kVA / (0.4 kV × 1.732) = 72.17 A

Q5: What are the primary application scenarios for a 50 kVA oil-immersed transformer?
With a low-voltage rated current around 72 Amperes, a 50 kVA transformer is ideal for remote village grid endpoints, small agricultural pumping stations, highway monitoring/lighting systems, telecom base stations, and localized solar power tie-ins. It is standardly equipped with a Dyn11 vector group to effectively handle unbalanced neutral load conditions up to 100%.