200-2500kVA 10kv 35kv New Energy Electrical Transmission Three Phase Distribution Oil Immersed Power Transformer Step Down Transformer

• Customization: Available
• Application: Power
• Phase: Three
• Model NO.: S11, S13, SH15, S(F)11, S(F)Z11, S(F)ZS11
• Core: Core-type Transformer
• Cooling Method: Oil-immersed Type Transformer
• Winding Type: Two-winding Transformer
• Certification: ISO9001-2000, ISO9001, CCC
• Usage: Power Transformer, Distribution Transformer
• Frequency Characteristics: Power Frequency
• Shape of Core: EI
• Brand: Changda
• OEM: Avaliable
• Conductor Material: Cooper
• Frequency: 50Hz
• Winding: Copper
• Temp. Rise: 65°C
• Transport Package: Export Standard Wooden Case
• Specification: 10kV/20kV/35kV/66kV/110kV
• Trademark: changda
• Origin: China
• Package Size: 1900.00cm * 1000.00cm * 1900.00cm
• Package Gross Weight: 2800.000kg

Product Description

Product Description

Changda oil-immersed transformers, rated up to 110kV, are power transformers where the core and windings are fully submerged in insulating oil, which provides excellent dielectric insulation and efficient heat dissipation for stable and reliable operation. 
Manufactured with advanced technology and strict quality control, our transformers offer high efficiency through optimized core design and low-loss materials, superior cooling performance with multiple methods (ONAN/ONAF/OF/AF), enhanced reliability with robust construction and high-grade oil, customizable configurations to meet project-specific needs, and eco-friendly leak-proof tanks complying with international standards such as IEC and IEEE, making them ideal for substations, industrial plants, renewable energy projects, and infrastructure applications.

Components&Materials

Core

Winding

Changda transformers are meticulously engineered using premium-grade materials, guaranteeing exceptional performance and unmatched durability. Each element is crafted with precision to meet the highest industry standards, ensuring reliability and longevity.

High-permeability silicon steel. 
Fully compliant with GB 20052-2024 and IEC60076 standards.
45° mitre cut joints.
Step-Lap Stacking.

QZY/180 copper wire.
Thermal class 180°C (H-Class).
<10pC partial discharge.

Specification

Product Type	Oil Immersed Transformer
Compliance Standards	IEC 60076, CE, ISO 9001
Phase Number	Three Phase
Key Features	Low No-Load Loss (≥20% Reduction), High Efficiency (Up to 99.2%), Stable Voltage Output, Low Temperature Rise
Rated Capacity	30 kVA ~ 50000 kVA(Customized)
Rated Frequency	50 Hz / 60 Hz
Rated HV	6 kV ~ 110 kV(Customized)
Rated LV	0.4 kV, 3.3 kV, 6.3 kV, 11 kV....(Customized)
Impedance Voltage	4% ~ 6%
Vector Group	Dyn11 / Yyn0
Cooling Method	ONAN/ONAF/OF/AF
Ambient Air Temperature	-45~+40°C

Company Profile

Workshop

Certifications

Exhibition

Packing & Delivery

FAQ

Q: Are you a manufacturer or trader?
A:We specialize in manufacturing, and our own factory covers an area of 26,000 square meters, equipped with industry leading production equipment,
advanced processing technologies, and a standardized quality control system.
We sincerely invite you to visit our factory!

Q: Can I use my own logo or design on the product?
A: Certainly. We offer professional OEMODM customization services, supporting end-to end customization from product appearance design to
performance parameters.

Q: What steps do we take to guarantee quality?
A: We conduct thorough inspections on all products prior to shipping to ensure they meet our quality standards.

Q: When will the goods be delivered?
A: Conventional in-stock products: Shipped within 3 working days after order confirmation;Customized products: Produced and shipped within 10-20 working days agreed upon based on customization complexity.

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.