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Energy Saving 20kV 0.4kV Three Phase Oil Transformer 630kVA 800kVA Hermetically Sealed for Construction Sites
The Energy Saving 20kV to 0.4kV Three Phase Oil Immersed Transformer is specifically engineered for high-demand environments such as construction sites and infrastructure projects. Available in 630kVA and 800kVA capacities, this hermetically sealed unit ensures high-efficiency power distribution with minimized energy loss. It is the ideal power solution for rugged terrains and temporary power grids, providing stable voltage for heavy machinery and site facilities.
Key Selling Points
Eco-Friendly Energy Efficiency: Optimized S11 core design reduces no-load losses, significantly lowering electricity costs for long-term projects.
Fully Hermetically Sealed Structure: The vacuum-filled mineral oil is isolated from air, preventing oxidation and moisture, making it virtually maintenance-free.
Robust Weatherproof Housing: Treated with anti-corrosive industrial coatings, the tank withstands extreme UV exposure and harsh outdoor conditions.
High Overload Capacity: Built with premium copper windings to handle the sudden current surges common in construction machinery.
Detailed Technical Specifications
Standard Compliance: Fully compliant with IEC60076 and international distribution standards.
Core Material: High-permeability, grain-oriented cold-rolled silicon steel for superior magnetic flux.
Cooling Method: ONAN (Oil Natural Air Natural) with enhanced corrugated radiator fins for maximum heat dissipation surface.
Insulation Class: Class A insulation with high-grade transformer oil (PCB-free) for safe operational thermal limits.
Tapping Range: ±5% or ±2x2.5% off-circuit tap changer to adjust to local grid fluctuations.
The Challenge: In dusty African regions, fine sand can clog traditional breathers and degrade seals, leading to hazardous oil leakage and internal contamination.
Our Solution:
Breather-Free Design: Our hermetically sealed corrugated tank absorbs oil volume changes through the elasticity of the fins, eliminating the need for a traditional conservator and breather, thus blocking all dust entry.
Precision Multi-Point Welding: We utilize automatic robot welding for the corrugated tank and base, followed by a 24-hour high-pressure leak test to ensure zero seepage.
Advanced Sealing Gaskets: We use high-performance acrylate rubber gaskets that remain flexible and crack-resistant under the scorching African sun, ensuring a permanent seal.
FAQ for Distributors & EPC Companies
Q1: Can this unit withstand 50°C ambient temperatures in African desert areas?
A1: Absolutely. The corrugated fin design increases the cooling area by 25%, ensuring the top oil temperature rise stays within safe limits even in extreme heat.
Q2: What is the lead time for a batch of 10 units for an EPC project?
A2: For standard 630kVA/800kVA models, we maintain a semi-finished stock, allowing us to ship within 15-20 days.
Q3: Does the transformer come with international test reports?
A3: Yes, each unit is provided with a comprehensive Factory Test Report. Type test reports from accredited labs are available upon request.
Q4: Is the transformer easy to transport to remote inland sites?
A4: Yes, the unit features reinforced lifting lugs and a heavy-duty steel base frame suitable for rugged truck transport over unpaved roads.
Q5: What support do you offer for large-scale government tenders?
A5: We provide full technical documentation, drawing designs (CAD), and authorization letters to support our partners in winning EPC and utility bids.
Contact our engineering team today for a prioritized quote and customized technical data sheet!
