Ready to Proceed?
Request a Firm Quotation for 400 kVA 33kV Three-Phase Oil-Immersed...
Share your project specifications and receive an official CIF quotation within 24 hours.
Oil-Immersed Transformers
Distribution
SKU: 400_KVA_33KV_THREE_PHASE_OIL_IMMERSED_DISTRIBUTION_TRANSFORMER
400 kVA 33kV Three-Phase Oil-Immersed Distribution Transformer
This 400 kVA oil-immersed distribution transformer is designed for reliable power distribution in rural utility networks, industrial feeders, and infrastructure projects across Africa, MENA, and other grid markets. ONAN cooling with IEC 60076 design reference. Export-ready from Hefei, China.
Compliance Standards
IEC • ANSI • IEEE • GB
Quality Inspection
100% FAT Routine Tested
Engineering CAD
2D CAD / SLD Schematics
Global Logistics
Direct Seaport CIF Export
Engineering Datasheet
Technical Parameters & Ratings
IEC / ANSI Certified
Factory Standard
| Rated Capacity | 400 kVA |
|---|---|
| Primary Voltage (U1) | 33,000 V (33 kV) |
| Secondary Voltage (U2) | 415 V / 240 V (3-Phase 4-Wire) |
| Vector Group | Dyn11 |
| Rated Frequency | 50 Hz |
| Cooling Method | ONAN (Oil Natural Air Natural) |
| Primary Current (I1) | 7.0 A |
| Secondary Current (I2) | 556.5 A |
| Guaranteed No-Load Loss (P0) | 570 W |
| Guaranteed Load Loss (Pk at 75°C) | 3900 W |
| Short-Circuit Impedance (Uk) | 4.0% |
| HV Insulation Level | LI 170 / AC 70 (33kV Class) |
| Temperature Rise Limits | Top Oil ≤ 50K, Winding ≤ 55K (45°C Ambient) |
| Creepage Distance | ≥ 31 mm/kV (Outdoor Tropicalized Porcelain) |
| Core & Coil Weight | 780 kg |
| Insulating Oil Weight | 490 kg |
| Total Assembled Weight | 1550 kg |
| Overall Footprint (L×W×H) | 1320 mm × 880 mm × 1480 mm |
| Governing Standards | IEC 60076, BS 171, SON NIS, NERC Code |
Application Scenarios
- Rural utility distribution network feeders
- Industrial and mining site power supply
- Infrastructure and EPC contractor projects in Africa and MENA
- Renewable energy grid connection at voltage class
Key Features
- 400 kVA rated capacity for rural utility and distribution network applications
- class design suited for Africa, MENA, and IEC-standard grid markets
- Oil-immersed ONAN structure for stable thermal performance in outdoor environments
- Copper or aluminum winding options available to suit project budget requirements
- Off-circuit tap changer with +/-2 x 2.5% or +/-5% range as standard
Engineering Submittal Drawing
2D AutoCAD General Arrangement (GA) Drawing & Footprint
Official XinHuan factory 2D vector General Arrangement drawing for 400 kVA 33kV Three-Phase Oil-Immersed Distribution Transformer. Includes front elevation view, top plan view, terminal centerline clearances, base channel mounting footprint, and complete vector group connection schematics.
Dimensions ($L \times W \times H$ mm)
Terminal Centerline Clearances
Base Channel Mounting Pitch
Vector Group & Rating Plate
XinHuan Hefei Manufacturing Plant — Precision Winding & Assembly Line
Factory Build Quality
Internal Construction & Premium Materials
Built with tier-1 certified raw materials engineered for long operational life (>30 years), superior dielectric withstand, and high short-circuit withstand capacity.
Silicon Steel Core
High-grade grain-oriented cold-rolled silicon steel with step-lap mitered joints for low $P_o$ losses.
100% Copper Windings
Electrolytic oxygen-free copper with high thermal grade insulation for surge resistance.
Precision Tap Changer
De-energized tap switch ($\pm 2 \times 2.5\%$) or on-load vacuum tap changer (OLTC) optional.
Protection & Sensors
Buchholz gas relay, magnetic oil gauge (MOG), and dial thermometers with alarm contacts.
Quality Assurance
CNAS & ISO 9001 Certified
100% Factory Acceptance Testing (FAT) Protocol
Every transformer unit manufactured by XinHuan undergoes mandatory routine factory testing prior to container dispatch. Full certified routine and type test submittal reports are provided with commercial documentation:
1. Insulation Resistance
Megger test (HV to LV, HV to Earth, LV to Earth) >1000 MΩ.
2. Voltage Ratio & Vector
Turns ratio check across all taps with phase displacement check.
3. Winding DC Resistance
Precision Kelvin bridge measurement across all tap positions.
4. Short-Circuit Impedance
Load loss ($P_k$) measurement corrected to reference temp (75°C).
5. No-Load Loss & Current
Core excitation test ($P_o$ and $I_o$) at rated sinusoidal voltage.
6. AC Voltage Withstand
Power-frequency separate source test (e.g. 50kV/70kV 1 min).
7. Lightning Impulse (BIL)
Full wave & chopped wave impulse withstand (BIL up to 170kV).
8. Partial Discharge & Seals
Ultra-low discharge (<5 pC) and pressurized oil/gas tightness test.
Logistics Intelligence
Global CIF / FOB Delivery
Export Packaging & Seaport Logistics
The product is prepared for export shipment with suitable packing and transport arrangements based on destination and handling requirements. Sea freight, air freight, and land transport options are available. Lead time is project-dependent and confirmed at order stage.
Production Lead Time
Standard manufacturing cycle is 4 to 6 weeks from approval of GA blueprints and single-line diagrams.
Heavy-Duty Export Packaging
Vacuum moisture barrier preservation, nitrogen blanketing, and reinforced steel-frame structural crate skids.
Direct Seaport Routes
Fast ocean freight to Port of Chancay & Callao (25-35 days), Manila, Lagos, and Middle East ports.
Equipment Video Inspection
100% TestedWatch XinHuan technicians perform routine dielectric testing, winding insulation checks, and quality inspections inside our Hefei manufacturing plant.
Every unit 100% routine tested before container loading.
Direct Factory Consultation
Need Custom Project Engineering?
Send your single-line diagram (SLD), voltage ratings, or tender specifications. Our chief electrical engineers will review and issue an actionable CIF quotation within 24 hours.
Custom Voltage Ratios
High-Altitude Derating
Short-Circuit Impedance
Third-Party FAT Witness
Engineering & Procurement FAQs
Frequently asked questions regarding specifications, certifications, and delivery for 400 kVA 33kV Three-Phase Oil-Immersed Distribution Transformer.
Please send us your required capacity, high voltage, low voltage (V), frequency (Hz), cooling method, vector group, tapping range, installation conditions, and destination country. We will respond with a configuration and indicative pricing within 24 hours.
The product can be produced according to IEC standards and customer technical specifications. Routine factory tests, insulation resistance, ratio, and load loss verification are standard. Type test reports available on request.
Standard manufacturing lead time is 4 to 6 weeks following approval of GA blueprints and single-line diagrams. Direct sea container shipping is available under FOB, CFR, or CIF terms with full customs documentation (Bill of Lading, Certificate of Origin, Test Reports).