Product Details
Company Profile

Electric Power Distribution High Voltage 35kV to 630-3150kV 3 Phase Oil Immersed Substation Transformer

Product Specifications

Frequency	50Hz, 60Hz, 50/60Hz
Phase	Three
Application	Power Transformer
Output Voltage	380V, 400V, 440V, 480V, 11kV
Input Voltage	6.6kV, 6.3kV, 6kV, 10kV, 35kV, 69kV, 110kV, 115kV, 132kV
Type	Oil-Immersed Transformer
Rated Capacity	800KVA~31500KVA
Cooling Method	Oil Cooling
Vector Group	Dyn11 / Yyn0

Product Overview

35kV series power transformers feature advanced design with significant improvements in materials, structure, and manufacturing processes.

Key Advantages

Enhanced Reliability: Oil-immersed design ensures high reliability in both normal and extreme conditions
Long-Lasting Durability: Built to withstand challenging environments and operate reliably for decades
Global Support Network: Backed by worldwide technicians and service centers

Technical Data for 35KV Three-Phase Oil Immersed Transformer (630KVA~31500KVA)

Capacity (KVA)	HV (KV)	HV Tapping	LV (KV)	Vector Group	No-load Loss (W)	On-load Loss (W)	No-load Current (%)	Short Circuit Impedance (%)
630	35	±5%	3.15 6.3 10.5	Yd11	830	7870	1.1	6.5
800					980	9410	1
1000					1150	11540	1
31500	35~38.5	±2*2.5%	3.15 3.3 6.3 6.6 10.5 11	Ynd11	20220	112860	0.32

Key Features

Optimized for 35kV Medium Voltage Networks: Designed for 35kV distribution systems, common in industrial zones and rural power grids. Provides efficient step-down transformation from sub-transmission to distribution voltage levels.
Stable and Balanced Three-Phase Power Supply: Delivers consistent voltage across all phases, ensuring smooth operation of heavy-duty equipment and reducing voltage fluctuations.
Efficient Oil-Immersed Cooling System: Uses mineral or natural ester insulating oil for effective heat dissipation and dielectric insulation. Maintains stable operating temperatures under high load conditions.
High Reliability and Robust Construction: Built to withstand electrical, mechanical, and thermal stress in demanding environments. Features hermetic sealing to prevent moisture ingress.

Our Order Process

Step 1: Inquiry & Design

We respond within 1 hour with suitable transformer recommendations, quotations, and payment terms. Our professional drawing and technical teams confirm all drawing contents within 7 days after payment, including technical data, weight, and parts list.

Step 2: Production & Quality Control

After design approval, we prepare stock, produce, and conduct rigorous quality inspections before shipment. We provide QC reports and test reports, with strict raw material screening and quality control processes.

Step 3: Installation & Support

Our professional team provides installation guidance and on-site support. We offer more than 2 years of warranty service for all our products.

Company Capabilities

30+ senior engineers offering 24-hour online service with 30-minute response time

100,000m² factory with 250 workers and 30+ engineers

4 production lines with 10,000+ sets annual production capacity

100% OQC testing with 25 detection contents

15 years power transformer design and production experience

Products comply with GB 20052-2024/ANSI/IEEE/DOE2016/CSA/IEC60076 standards

Frequently Asked Questions

Who are we?

HENTG POWER is a professional designer, manufacturer and installer of power system solutions worldwide, founded in 2011 with 100,000 square meter facility, specializing in reliable, high-performance solutions for global power systems.

How can we guarantee quality?

We conduct pre-production samples before mass production and final inspections before shipment, providing QC & test reports. We accept Factory Acceptance Tests (FAT) and manufacture oil type and dry type distribution transformers up to 500KV 480MVA power transformers, GIS, switchgear, and substations, complying with international standards.

Why choose us?

We have professional and independent drawing and technical teams that can confirm all drawing contents within 7 days. Our technical team includes 30+ senior engineers offering 24-hour online service with 30-minute response time.

What services can we provide?

We accept OEM orders and negotiate business payment terms to meet customer requirements.

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