What safety features are included in the design?

Safety features include a Buchholz relay for gas accumulation alarms, a pressure relief valve to prevent tank overpressure, and an oil level gauge for real-time monitoring.

What is the noise level of the transformer?

The transformer is designed for low-noise operation, with a noise level of 65 dB(A) or less at a distance of 1 meter.

What are the typical application scenarios for this transformer?

It is suitable for urban substations, industrial parks with fluctuating loads, renewable energy integration, large industrial enterprises, and power plant step-up substations.

Advanced Design Durable Fully Sealed Transformer for Industrial Use

Name: Advanced Design Durable Fully Sealed Transformer for Industrial Use
Brand: Zhejiang Tenrony Electric Co, . Ltd
SKU: 2285784875

Zhejiang, ChinaZhejiang Tenrony Electric Co, . Ltd

US$7,968.00

1-9 Pieces

US$7,536.00

10+ Pieces

Product profile

Customization

Available

Application

Power, Electronic, Instrument, Rectifier, Combined Transformer, Power Transformer,

Phase

Three

Model NO.

S20-M

Core

Core-type Transformer

Cooling Method

Oil-immersed Type Transformer

Winding Type

Multi-winding Transformer

Certification

ISO9001-2000, ISO9001, CCC, CE

Usage

Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer, Three Phase Transformer

Frequency Characteristics

Power Frequency

Shape of Core

Ring

Brand

Tenrony

Rated Frequency

50/60Hz

Rated Voltage/Hv

11/33kv

Rated Voltage/LV

400V

Transformer Capacity

1250-31500kVA

Connection of Transformer Winding

Yyn0/Dyn11

Winding

Copper/Aluminum

Transport Package

Wooden Case

Specification

1800*1300*2000mm

Trademark

TENRONY

Origin

China

HS Code

8504109000

Production Capacity

500/Monthly

Key features

High Efficiency Cooling: Forced air cooling boosts heat dissipation 30-50% over conventional oil-immersed transformers.

Higher Capacity Output: Delivers ~40% more output than ONAN at the same size, scaling up to 63,000+ kVA.

Robust Overload Protection: Supports 120% rated load continuous and 150% short-term for emergency dispatch.

Low Noise Operation: Designed with low-noise fans and structures to maintain noise levels at or below 65 dB.

Sealed Oil System: Superior sealing prevents oil leakage, reducing unplanned downtime and maintenance costs.

Comprehensive Safety: Equipped with Buchholz relay, pressure relief valve, and real-time oil level monitoring.

Versatile Applications: Ideal for urban substations, industrial parks, renewable energy, and power plant step-up.

Company profile

Importers and ExportersFull Customization100% Finished Products InspectionR&D Capabilities

Zhejiang Tenrony Electric Co, . Ltd

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 1 Year CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤1.61h

About Our Factory & Business Background

AddressNo. 788 Wenyi Road, Bihu Town, Lishui, Zhejiang, China

Plant Area50369.12 square meters

Number of Employees167

Registered Capital107,580,000 RMB

Terms of PaymentT/T

International Commercial Terms(Incoterms)FOB, CIF

Average Lead TimePeak Season Lead Time: one month Off Season Lead Time: within 15 workdays

Minimum Order Quantity1

Supply Chain Partners80

Our Production Capability & Technical Expertise

Main ProductsTransformer Switchgear Substation

Production Lines2

Production MachinesPunching machine, Laser cutting machine, CNC bending machine, Winding machine, Drying machine

QA/QC inspectors3 people

Inspection Type for Finished Products100% inspection(Visual inspection & Function inspection)

Inspection Method for Finished ProductsFinished product checked by packing staff

R&D Engineers7 people

Traceability of Raw MaterialsYes

Our Industry Experience & Global Business Record

Year of Establishment2003-12-05

Main MarketsDomestic

Repeat Buyers Choice30%~50%

Number of Foreign Trading Staff1

Overseas Agent/BranchYes

New Products Launched in Last yearYes

Our Certifications, Standards & Industry Recognition

Management System CertificationISO9001:2015, ISO14001, ISO45001:2018

Product CertificationCE

Cooperated with Fortune 500No

Product Q&A

Q:What is the cooling method used in this transformer?

The transformer uses an ONAF (Oil Natural Air Forced) cooling method, which employs multiple low-noise fans that activate automatically to boost heat dissipation efficiency.

Q:What is the rated capacity range of the SF20 series?

The SF20 series offers a rated capacity range from 10,000 kVA to 120,000 kVA, with ONAN ratings starting at 10,000 kVA and OFAF scaling up to 63,000+ kVA.

Q:Can the vector group and other parameters be customized?

Yes, the vector group (YNd11 / YNyn0d11), rated frequency (50/60Hz), rated voltage, transformer capacity, and winding type (Copper/Aluminum) are customizable.

Q:What is the expected service life of the transformer?

The transformer is designed for a service life of 30 years or more, thanks to uniform temperature distribution and premium insulation that eliminate hot spots.

Q:What overload protection capabilities does the transformer have?

It supports 120% rated load continuous operation with fans at full speed, and can handle 150% rated load for short-term emergency dispatch.