[email protected]
Home > Vacuum Pressure Impregnated (VPI) Transformer > Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
1 / 5
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material

Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material

Send Inquiry

Product Description

MV/HV TRANSMISSION & SUBSTATION SOLUTIONS

  • High-Performance Medium & High Voltage Electrical Power Transformer
  • Capacity Range: 5MVA-125MVA
  • Primary Voltage: 33kV-220kV (Up to 230kV)
  • Standards: IEC 60076 / IEEE C57 / KEMA Certified

Technical Specifications

Transformer Specifications
Detail 1
Detail 2
Detail 3
Technical Parameter Product Specifications & Grid-Level Standard Value
Transformer Type Liquid-Immersed / Oil-Filled Conservator Type
Cooling Method ONAN (Oil Natural Air Natural) / ONAF (Oil Natural Air Forced)
Rated Capacity 5MVA / 10MVA / 20MVA / 31.5MVA / 50MVA / 63MVA / 100MVA / 125MVA (Customizable)
Primary Voltage (HV) 33kV / 35kV / 66kV / 69kV / 110kV / 115kV / 132kV / 138kV / 220kV / 230kV (Customizable)
Secondary Voltage (LV) 6.3kV / 10.5kV / 11kV / 22kV / 33kV / 34.5kV (Customizable)
Vector Group YNd11 / YNyn0d11 / Yd11 (In accordance with grid requirements)
Tap Changer Type OLTC (On-Load Tap Changer) or NLTC (No-Load Tap Changer)
Tapping Range ±8 × 1.25% / ±4 × 2.5% / ±2 × 2.5% (Customizable)
Winding Material 100% Electrolytic Oxygen-Free Copper (Premium CTC Continuous Transposed Conductor)
Core Structure 3-Column / 5-Column High-Grade CRGO (Cold-Rolled Grain-Oriented) Silicon Steel
Partial Discharge Level ≤10pC (At 1.5Um/√3, significantly below international standards)
Standards Compliance IEC 60076, IEEE C57, ANSI, KEMA Typetest, GB/T 6451

Core Technology & Details

CRGO Core Technology
Ultra-Low-Loss CRGO Core Technology
  • Manufactured using high-permeability, laser-treated, cold-rolled grain-oriented silicon steel laminations.
  • Significantly minimizes eddy current losses, no-load losses, and magnetostriction noise.
  • Optimized core clamping structures ensure excellent mechanical strength during seismic events.
High-Reliability Windings & CTC
  • Utilizes Continuous Transposed Conductor (CTC) for high-capacity windings to lower eddy current losses.
  • Coils are uniformly pressed and dried under vacuum to ensure short-circuit withstand capability.
  • Premium insulation paper (Class A) ensures partial discharge levels are kept under 10pcs.
Winding Technology
OLTC Control
Precision Voltage Control: Advanced OLTC
  • Equipped with high-reliability On-Load Tap Changers (OLTC) for automated, uninterrupted voltage regulation.
  • Ensures consistent secondary voltage delivery despite fluctuating grid loads.
  • Vital for sensitive industrial manufacturing and utility distribution.

Safety & Monitoring Components

Buchholz Relay

Buchholz Relay

Dual-float type with alarm and trip contacts to detect internal gas accumulation and oil surges.

Pressure Relief Valve

Pressure Relief Valve

Instantaneous mechanical release with micro-switch to protect the tank against overpressure.

Temperature Controllers

Intelligent Controllers

Multi-channel OTI & WTI with analog/digital output (4-20mA, RS485 Modbus) for SCADA integration.

Global Substation Project Showcases

Project 1
Heavy Metal Smelting Plant Substation (Middle East)

Specification: 80MVA, 220kV to 33kV Heavy-Duty Industrial Transformer.

Outcome: Sustained continuous operation under 50°C ambient temperatures with C5-M marine-grade painting.

Project 2
150MW Onshore Wind Farm Step-Up Station (Europe)

Specification: 63MVA, 34.5kV to 132kV Step-Up Generation Transformer.

Outcome: Successfully step-up fluctuating wind power to national grid with high annual efficiency.

Project 3
110kV Regional Transmission Substation Upgrade (South America)

Specification: 50MVA, 110kV to 13.8kV ONAN/ONAF Step-Down with OLTC.

Outcome: Resolved voltage sag issues during peak hours with advanced SCADA thermal monitoring.

Customization & Manufacturing

We provide reliable, energy-saving and durable transformers for power grids, infrastructure, industry and construction projects worldwide. We accept OEM & ODM orders with professional technical support.

Factory 1
Factory 2
Custom Design

Comprehensive Custom Design: Tailored designs based on specific capacity, voltage, and cooling requirements for complex load demands.

Production

Flexible Production: Advanced automation and precision testing systems allow for fast delivery and high-quality customized production.

Frequently Asked Questions

1. What is the customization cycle for transformers?
7-15 working days for regular models; 15-25 working days for complex configurations such as non-standard voltage or explosion-proof designs.
2. Do your customized products comply with international standards?
Yes, all products adhere to IEC/IEEE/GB standards. CE or UL certification can be arranged upon request to ensure grid compatibility.
3. How do I determine the suitable power and voltage parameters?
Simply provide your load type, working environment, and installation space. Our engineers provide free customization plans for precise matching.
4. What is the standard warranty period?
We provide a 1-3 year warranty (extendable), covering free repair and parts replacement, plus lifelong technical support.
5. Can these transformers adapt to extreme environments?
Yes, we offer protection levels up to IP65 and temperature-resistant materials suitable for environments ranging from -40°C to 60°C.
6. What cooling methods are available?
We provide both ONAN (Oil Natural Air Natural) and ONAF (Oil Natural Air Forced) cooling methods depending on the capacity and load requirements.

Related Products

Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material

Continuous Duty 3 MVA 1MVA 1000KVA Oil Power Transformer 400V to 11KV 50Hz Input 6KV and 35KV 380V 480V Output Aluminum Material
Specialty Transformers Transformer Oil Water Cooler

Specialty Transformers Transformer Oil Water Cooler
Premium VPI (Vacuum Pressure Impregnation) Dry-type Transformer with Superior Dielectric Strength

Premium VPI (Vacuum Pressure Impregnation) Dry-type Transformer with Superior Dielectric Strength
VPI Vacuum Impregnated Dry Transformer 33kV 35kV 50Hz/60Hz Optional Copper Coil Transformer

VPI Vacuum Impregnated Dry Transformer 33kV 35kV 50Hz/60Hz Optional Copper Coil Transformer
Vacuum Pressure Impregnation (VPI) Equipment | For Motors, Relays & Transformers | Electronic Component Coil Sealing System

Vacuum Pressure Impregnation (VPI) Equipment | For Motors, Relays & Transformers | Electronic Component Coil Sealing System
Factory Supply 30-3750kVA Vacuum Pressure Impregnation Dyn11 Yyn0 35kV VPI Ventilated Dry Type Transformer

Factory Supply 30-3750kVA Vacuum Pressure Impregnation Dyn11 Yyn0 35kV VPI Ventilated Dry Type Transformer
S11 22kV 11kV 10kV Three Phase Oil Immersed Rectifier Transformer 400kVA-16300kVA Amorphous Alloy Core Power Transformer

S11 22kV 11kV 10kV Three Phase Oil Immersed Rectifier Transformer 400kVA-16300kVA Amorphous Alloy Core Power Transformer
CEEG Transformer Electrical 630 KVA 800 KVA Safe Reliable Energy Saving Vacuum Pressure Impregnated VPI Dry Type Transformer

CEEG Transformer Electrical 630 KVA 800 KVA Safe Reliable Energy Saving Vacuum Pressure Impregnated VPI Dry Type Transformer
24v 12v Small-sized Electronic Flyback Single Phase Plastic Power EE/EQ/PQ/ER Series Magnetic Core High-Frequency Transformer

24v 12v Small-sized Electronic Flyback Single Phase Plastic Power EE/EQ/PQ/ER Series Magnetic Core High-Frequency Transformer
VPI System Vacuum Pressure Impregnation Equipment for Motor Transformer Maintenance Varnish Repair Dipping Plant

VPI System Vacuum Pressure Impregnation Equipment for Motor Transformer Maintenance Varnish Repair Dipping Plant