The HENTG POWER 160kVA 11kV/0.4kV three-phase oil-immersed distribution transformer is a step-down unit designed for utility grids, commercial projects, and rural electrification. ONAN cooled, IEC 60076 compliant. Hermetically sealed corrugated tank eliminates breather and conservator, preventing dust and moisture ingress. Suitable for ambient temperatures up to 45°C (upgradeable to 50°C).

• IEC 60076 Certified – Full routine tests included. Acceptable for African utility tenders and EPC projects.
• Hermetically Sealed – No Breather – Zero dust or moisture ingress. Eliminates silica gel replacement and oil top-up.
• Low Loss CRGO Core – Reduces no-load and load losses, lowering lifetime operating costs.
• Aluminum Winding – Budget Friendly – 30–50% material cost saving vs copper. Same rated performance through optimized conductor sizing.

Included accessories: Pressure relief device, oil temp gauge, Buchholz relay, oil level sight gauge, drain valve with sampling port.

Problem: Sand, dust, high temperature (40°C+), and thermal cycling cause oil leaks, breather blockage, and insulation failure.

Our Solutions:

• Hermetically sealed welded tank – No breather, no conservator. Corrugated walls flex to absorb oil expansion/contraction. Eliminates the main dust entry path.
• Groove-retained NBR gaskets – Prevent extrusion under thermal stress. Multi-bolt pattern maintains compression during transport.
• 100% pressure leak testing – Each tank tested at 1.5× operating pressure before oil filling.
• Multi-layer coating – Epoxy zinc primer + polyurethane topcoat resists UV, corrosion, and sand scouring.
• Optional Class B/F insulation – For sustained 45–50°C ambient temperatures.
• Low maintenance – No breather servicing, no routine oil top-up. Annual visual inspection + DGA every 2–3 years.

• Q1: Is the 11kV transformer compatible with 10.5kV or 10kV networks?

  A: Yes. The off-circuit tap changer (±2×2.5%, 5 positions) allows field adjustment to 10kV, 10.5kV, or 11kV without unit replacement.

• Q2: How does aluminum winding compare to copper?

  A: Aluminum uses 1.6× larger conductor cross-section to achieve the same current rating. Material cost is 30–50% lower. Load loss is slightly higher (5–10%) – acceptable for most distribution projects. Copper optional.

• Q3: What test reports are provided?

  A: Routine test reports per IEC 60076: winding resistance, turns ratio, insulation dielectric, no-load loss, load loss, impedance, and tank pressure test. CE support available.

• Q4: What is delivery time to African ports (e.g., Dar es Salaam, Tema, Mombasa)?

  A: Production 30–35 days. Ocean freight 30–50 days depending on port. Export docs (CO, invoice, test reports) provided.

• Q5: What maintenance is needed in remote areas?

  A: Very low. Annual visual check of paint, oil level, and pressure relief device. Oil sampling for DGA every 2–3 years. No breather servicing, no oil top-up.