Power Distribution 10kv 20kv 35kv Transformer Oil Immersed Type Three Phase Electric Substation Transformers

• Customization: Available
• Application: Power, Electronic, Instrument, Lighting, Rectifier, Audio
• Phase: Three
• Core: Core-type Transformer
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Two-winding Transformer
• Certification: ISO, CE
• Usage: Power Transformer, Distribution Transformer
• Frequency Characteristics: Low Frequency
• Shape of Core: Ring
• Frequency: 50Hz
• Standard: IEC60076
• Rated Capacity: 30kVA~2500kVA
• Model Number: S11-M
• Transport Package: Export Standard Wooden Case
• Specification: Customized
• Trademark: KaiBian
• Origin: China
• HS Code: 8504210000
• Package Size: 400.00cm * 400.00cm * 300.00cm
• Package Gross Weight: 100.000kg

Product Description

Oil-immersed Power Transformer

Kaibian oil-immersed transformers are widely used in residential communities, commercial complexes, industrial and mining enterprises, power stations, public facilities, and urban/rural power grid upgrading projects. They are suitable for 10kV / 20kV / 35kV distribution and transmission systems with stable performance in various load fluctuation conditions and harsh environments.

Kaibian is a professional manufacturer specializing in high- and low-voltage transmission & distribution equipment and electrical components, and is one of the excellent suppliers of State Grid Corporation of China.

Main Products:, , CT/PT transformers,,: KYN28A, KYN61, XGN, HXGN, SHSRM, etc.: MNS, GCS, GCK, GGD, XL series,, load break switches, and complete power distribution solutions.

Product Description

Product Advantages

1. High-quality silicon-steel core, low no-load loss & low noise

Using high-grade silicon steel sheets with 45° multi-seam lamination, ensuring high lamination coefficient, reduced no-load loss, and lower operational noise.

2. Fully-sealed corrugated tank — maintenance-free and extended service life

The sealed design keeps transformer oil isolated from air, preventing oxidation and moisture ingress, reducing maintenance and improving service life.

3. Strong short-circuit withstand capability

Reinforced structure and mistake-proofing scheme ensure excellent short-circuit tolerance and consistent product quality.

Product Advantages

4. High overload performance for peak-load scenarios

High-overload models support:

1.5× rated capacity for 6 hours
1.75× for 3 hours
2.0× for 1 hour

Ideal for rural peak seasons, holiday load surges, etc.

5. Low partial discharge, excellent thermal stability, and safer operation

Ensures low PD, high thermal performance, low noise, and strong overload capabilities.

6. Compact size & appealing appearance

Small footprint and clean design make it suitable for various installation environments.

Certifications

Specification

Product Model	Voltage class	Tapping range	Vector group	Capacitance range	Insulation level	No-load loss (W)	Load loss(W) 120℃/75℃	Voltage regulating mode
35kV 0il-immersed Power Transformer	35kV	+2*2.5%,+5%	Yyn0, Dyn11	forS11-M, 800~25000kVA		984~2022/2.30~21.30	9405~112860/19.24~121.90	no excitation voltage regulation, on-load voltage regulation
20kV Oil-immersed Distribution Transformer	20kV	+2*2.5%,+5%	Yyn0, Dyn11	for S11-M, 30~2500kVA; for S13-M, 30~1600kVA	20kV LI25 AC50	690/660~22220	S11:100~2340 S13:80~1640	no excitation voltage regulation
10kV Oil-immersed Distribution Transformer	10kV, 6kV	+2*2.5%,+5%	Yyn0, Dyn11	for S11-M, 30~3150kVA; for S13-M, 30~3150kVA	6kV LI60 AC25, 10kV LI75 AC35	S11:50~2060 S13:80~1170	S11:350/320~1940/18500 S13:630/600~14500	no excitation voltage regulation
10kV High Overload Oil-immersed Distribution Transformer	10kV	+2*2.5%,+5%	Yyn0, Dyn11	for S11-M/S13-M, 50/100/200kVA	10kV L175 AC35	130~340	910/870~2730/2600	no excitation voltage regulation
10kV Oil-immersed(High Overload) Amorphous Alloy Distribution Transformer	10kV, 6kV	+2*2.5%,+5%	Yyn0, Dyn11	for S(B)H15-M, 50, 100, 200kVA	10kV L175 AC35	43~120	910/870~2730/2600	no excitation voltage regulation
10kV Oil-immersed Tridimensional Toroidal-core Transformer	10kV	+2*2.5%,+5%	Yyn0, Dyn11	for S11/S13-M, 30~1600kVA	10kV LI75 AC35	S11:100~1640 S13:80~1170	630/600~14500	no excitation voltage regulation
10kV Oil-immersed On-load CapacityRegulating Distribution Transformer	10kV	+2*2.5%,+5%		for S11/S13-M- Z T, 160~630kVA	10kV LI75AC35	280(130)~810(340)	259(1030)~8030(3060)	no excitation voltage regulation

Fully Customizable Options (OEM / ODM Available)

Our oil-immersed transformers can be customized to meet different grid standards, environmental conditions, and project requirements.

1. Customizable Voltage Levels
·6 kV / 10 kV / 11 kV / 20 kV / 33 kV / 35 kV;LV side options: 0.4 kV, 0.415 kV, 0.69 kV (if required)
2. Customizable Frequency
·50 Hz / 60 Hz;Compatible with global electrical systems.
3. Customizable Rated Capacity
·From 30 kVA to 25000 kVA;Suitable for residential, commercial, industrial, and utility applications.
4. Customizable Winding Material
·Copper (Standard): excellent conductivity, long service life, high short-circuit strength
·Aluminum (Optional): cost-effective option for engineering projects
5. Customizable Loss Level
·Available according to different efficiency standards:;S11, S13, SH15 (Amorphous Alloy)
·Support custom no-load loss & load loss values based on client requirements
6. Customizable Temperature Rise
·65K / 75K / 95K;Higher temperature rise options available for heavy-load or high-ambient environments.
7. Customizable Tapping Range
·±2×2.5%;±5%;Or customized tapping range upon request
8. Customizable Appearance & Structure
·Radiator type & quantity;Plug-in or cable-type connections;Tank color (grey / green / customized colors)

Packing & Delivery

Company Profile

About CHKB

Zhejiang Kaibian Electric Technology Co., Ltd., A member of Shenheng Power Equipment Co.,LTD. founded in June 2018, is located in Yueqing, Wenzhou—known as the "Capital of China's Electrical Appliances". Our manufacturing base covers approximately 5,500 m², and our annual sales exceed 100 million RMB.
As a professional manufacturer integrating R&D, production, sales, and service, Kaibian focuses on electrical equipment and is committed to providing high-reliability power transmission and distribution products and solutions worldwide.
Our main product lines include:Ring Main Units (RMU),Ring Main Boxes,Prefabricated Substations (European-Style / American-Style), Transformers (Dry-type, Oil-immersed, Special Transformers),Distribution Boxes & LV Switchgear, Energy Meters,Pole-mounted Circuit Breakers, and other T&D equipment.

Zhejiang Kaibian Electric Technology Co., Ltd., founded in June 2018, is located in Yueqing, Wenzhou—known as the "Capital of China's Electrical Appliances". Our manufacturing base covers approximately 5,500 m², and our annual sales exceed 100 million RMB.
As a professional manufacturer integrating R&D, production, sales, and service, Kaibian focuses on electrical equipment and is committed to providing high-reliability power transmission and distribution products and solutions worldwide.

Our main product lines include:Ring Main Units (RMU),Ring Main Boxes, (European-Style / American-Style), Transformers (, , Special Transformers),Distribution Boxes & , Energy Meters,, and other T&D equipment.

Since its establishment, Kaibian has adhered to the business philosophy of
"Management Creates Value, Service Enhances Advantage, Quality First, Service Excellence".
We have passed ISO9001, ISO14001, and ISO45001 management system certifications, ensuring strict quality control and reliable product performance.

We have supplied high-quality equipment for numerous national and key projects, including:
Shanghai Jinmao Tower, Xichang Satellite Launch Center,Beijing Positron–Electron Collider,National Centre for the Performing Arts (China),
Yangshan Deep-Water Port Logistics,Shanghai Metro Supporting Facilities,Multiple national and municipal T&D projects

Our products have been exported to multiple international markets, including:
1.Europe: Hungary, Poland;2.Middle East: Saudi Arabia, Iraq, Iran, Azerbaijan;3.Africa: Ethiopia, South Africa;4.Southeast Asia: Vietnam, Singapore, Thailand;5. Latin America: Mexico, Chile, Brazil, etc.

With advanced manufacturing capabilities, strict quality control, and fast-response service, Kaibian is committed to delivering high-quality equipment and customized solutions. We look forward to building long-term partnerships with global customers and contributing to the high-quality development of the power industry.

Main Product

FAQ

Q: What's the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.
 
Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.
 
Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.
 
Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).
 
Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.