Zhejiang Tenrony Electricity Co., Ltd.
Zhejiang Tenrony Electricity Co., Ltd.

SF20-8000KVA Power Transformer

The SF20-8000KVA Power Transformer is a large-capacity oil-immersed power transformer with a rated capacity of 8000KVA, part of the SF20 series. It features a high-permeability silicon steel core and low-loss winding design. To address the heat dissipation challenges of large-capacity transformers under sustained full-load operation, it is equipped with a forced air cooling (ONAF) system, ensuring safe and stable operation.

Suitable for 10kV/35kV class power transmission and distribution systems, it serves as the primary power equipment for industrial enterprises, substations, commercial complexes, and more.


Features of SF20-8000KVA Power Transformer

Features
01

Large Capacity for High-Load Scenarios

Rated capacity of 8000KVA, meeting medium-to-large industrial power distribution and regional substation demands

Strong short-term overload capability, adaptable to impact loads


02

Fully Sealed Structure, Maintenance-Free

Fully sealed corrugated tank or expansion tank design prevents air and moisture ingress

Insulation oil resists oxidation, enabling long-term maintenance-free operation after commissioning


03

Outstanding Heat Dissipation & Insulation:

Effectively solves the heat dissipation problem of large-capacity transformers and the insulation challenge of high-voltage transformers, avoiding equipment failure caused by overheating or insulation damage, and improving the overall operational reliability.


04

Fully Sealed Design:

The transformer adopts a fully sealed structure, which can effectively prevent insulation oxidation, reduce aging speed of internal components, and extend the service life. It also has strong resistance to external environmental interference, suitable for long-term outdoor operation.


05

High Reliability, Multi-Layer Protection

Equipped with gas relay (Buchholz protection), pressure relief valve, oil level gauge, and temperature controller

Tank rigorously tested for pressure and sealing to ensure no leakage

Vacuum oil-filling process eliminates residual moisture and gas


06

Low Noise Design

Optimized core lamination and clamping structure, operating noise controlled at 55~65dB(A) (at 1m distance)


07

Superior Short-Circuit Withstand Capability

Windings use high-strength continuously transposed conductors or self-adhesive transposed conductors with precision axial compression

Passes rigorous short-circuit withstand tests to ensure no displacement or deformation under grid faults


Applications

Industrial Power Distribution

Factories and Mines: Main distribution transformers for steel mills, cement plants, chemical plants, etc.

Large Equipment Power Supply: Stable power for large compressors, crushers, rolling mills and other impact loads

Regional Substations

10kV/35kV Main Transformers: Core step-up/step-down equipment for urban distribution networks and industrial park substations

Renewable Energy Integration: Step-up transformers for centralized PV power stations and small wind farms

Commercial and Public Facilities

Large Commercial Complexes: Dedicated distribution transformers for data centers, super high-rise buildings, large hospitals

Airports/Stations/Ports: Primary power supply for transportation hubs requiring extremely high reliability

Special Environment Adaptation

Optional high-altitude (derated above 3000m) or corrosion-resistant (coastal/chemical environment) configurations

Forced air cooling system offers significant advantages in tropical/subtropical high-temperature regions


Technical Specifications

Model

SF20-8000/10(35)

Rated Capacity

8000 KVA

Voltage Combination

10±5%/0.4kV or 35±5%/10.5kV

Connection Group

Dyn11 or Yd11

Cooling Method

ONAF (Oil Natural Air Forced)

Insulation Class

Class A or Class F

No-Load Loss

Per energy efficiency grade

Load Loss

Per energy efficiency grade

Impedance Voltage

7.5%~8.5%

Noise Level

≤ 65 dB(A)


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