S18 Distribution Transformer - China Manufacturers

1. Low loss, fully sealed, non-excitation voltage regulation (5 levels), 24-hour uninterrupted power supply, long annual operating time (design life ≥ 30 years). 2. Cooling method: ONAN oil-immersed self-cooling. 3. High-permeability cold-rolled grain-oriented silicon steel sheets (0.23mm grade), fully oblique joints, no punching, low noise, low loss. 4. Fully sealed corrugated oil tank, no oil conservator; fully sealed structure, no core lifting, no maintenance. 5. High-permeability grain-oriented silicon steel sheets, multi-level joints, low noise; Protection level: IP00 (outdoor transformer substations can reach IP30 or higher). 6. Windings: All copper, high-voltage cylindrical type, low-voltage foil/cylindrical type, uniform oil channels, strong short-circuit resistance. 7. Applicable scenarios: Suitable for urban and rural power grids, industrial plants, commercial buildings, new energy supporting facilities, and other diverse scenarios. 8. Standardized design; special requirements can be customized.

S18 Three-Phase Off-Circuit Tap-Changing Distribution Transformer

The S18 Three-Phase Off-Circuit Tap-Changing Distribution Transformer from Lijie Electric delivers enterprise-grade performance with exceptional energy efficiency. Meeting the latest 2021 energy efficiency standards, this transformer features a fully sealed corrugated oil tank design, eliminating maintenance needs over its 30-year design life. Built with high-permeability grain-oriented silicon steel sheets (0.23mm grade), it achieves remarkably low no-load and load losses. With capacity ranging from 30-3150kVA and voltage levels of 6kV/12kV, it's engineered for 24-hour uninterrupted operation across diverse applications—from urban power grids to industrial facilities and renewable energy projects.

S18 Three-Phase Off-Circuit Tap-Changing Distribution Transformer

Why Choose Our Distribution Transformer?

Extreme Energy Efficiency

You'll see quick fetched reserve funds with our first-class vitality productivity plan. The transformer employments premium press center materials and optimized windings that significantly diminish control misfortunes. When you're running hardware persistently, these investment funds include up quick. You're not fair cutting power bills—you're moreover decreasing your carbon impression and supporting your maintainability goals.

Zero Upkeep Design

Forget approximately normal support plans. The completely fixed folded oil tank keeps dampness, clean, and contaminants out totally. You won't require to lift the center, alter oil, or stress almost oil disintegration. This plan is idealize if you're overseeing inaccessible destinations or unattended substations where support visits are exorbitant and inconvenient.

Built for Cruel Conditions

Your transformer needs to withstand real-world challenges. Our strengthened windings and coordinates center clamping give amazing short-circuit resistance. The anti-corrosion treated tank handles coastal stickiness, mechanical contamination, and open air introduction without compromising execution. You get solid control indeed in requesting environments.

Quiet Operation

Noise contamination things, particularly in private and commercial regions. Through optimized center cover and oil stream channels, we've minimized working clamor essentially. Your neighbors and inhabitants will appreciate the calm execution.

Technical Specifications

Parameter	Specification
Product Model	S18 Three-Phase Off-Circuit Tap-Changing Distribution Transformer
Capacity Range	30-3150kVA
Voltage Level	6kV, 12kV
Voltage Regulation	Off-circuit (non-excitation) tap changing
Tap Range	±5%, ±2×2.5%
Frequency	50Hz, 60Hz
Phases	Three-phase (single-phase available)
Connection Group	Yyn0 or Dyn11
Cooling Method	ONAN (Oil Natural Air Natural)
Core Material	High-permeability grain-oriented silicon steel (0.23mm)
Winding Material	100% copper
Insulation Level	Power frequency withstand: 35kV AC / Impulse: 75kV
Protection Level	IP00 (IP30+ available for outdoor substations)
Design Life	≥30 years
Operating Temperature	Max 40°C ambient (customizable)
Tank Design	Fully sealed corrugated structure, no conservator

S18 Three-Phase Off-Circuit Tap-Changing Distribution Transformer

Ideal Applications

You'll find this S18 Three-Phase Off-Circuit Tap-Changing Distribution Transformer perfectly suited for:

Urban and Rural Power Grids: Distribution network upgrades and old transformer replacements
Industrial Facilities: Manufacturing plants, factories requiring stable power supply
Commercial Buildings: Shopping centers, office complexes, hotels
Renewable Energy Projects: Wind farms, solar installations needing grid integration
Residential Communities: Housing developments and apartment complexes
Remote Locations: Mining operations, agricultural facilities, unattended stations

Manufacturing Excellence

When you select Lijie Electric, you're collaborating with a demonstrated industry pioneer. Our two fabricating bases in Xuzhou and Nantong span 500,000 square meters, prepared with progressed generation offices. Our group incorporates over 160 engineers with doctoral and master's degrees, guaranteeing each transformer meets thorough quality standards.

We hold universal certifications counting ISO 9001:2015, CE, UL, and IEC compliance. Each unit passes testing by China's National Transformer Quality Supervision and Assessment Center. You get total documentation—test reports, specialized drawings, and operation manuals—with each order.

Flexible Customization

Standard details do not continuously fit one of a kind ventures. That's why we offer customization for extraordinary necessities. Whether you require particular voltage levels, capacity alterations, or natural adjustments, our building group works with you to create the right arrangement. Generation cycles extend from 6 to 30 days depending on determinations.

S18 Three-Phase Off-Circuit Tap-Changing Distribution Transformer

FAQ

Q: What makes the S18 distinctive from more seasoned transformer models?

A: The S18 meets the unused 2021 vitality proficiency measures with altogether lower misfortunes than past eras. The completely fixed plan dispenses with support, whereas conventional transformers require standard oil changes and inspections.

Q: How much can I spare on working costs?

A: Investment funds depend on your stack profile, but diminished misfortunes regularly abbreviate the speculation payback period significantly. Over the 30-year life expectancy, you'll spare considerably on power costs and for all intents and purposes dispense with support expenses.

Q: Can this transformer handle open air installation?

A: Completely. The anti-corrosion treated tank and completely fixed plan make it perfect for open air utilize. For substations, we can give IP30 or higher security levels.

Q: What voltage regulation options are available?

A: The S18 features off-circuit (non-excitation) tap changing with ±5% or ±2×2.5% adjustment range. Adjustments are made when the transformer is de-energized.

Q: Do you provide installation support?

A: Yes, we offer installation guidance, complete technical documentation, and after-sales support. Our team is available to assist throughout your project.

Q: What's the delivery timeline?

A: Standard models typically ship within 6-30 days depending on capacity and specifications. Custom orders may require additional time, which we'll confirm during quotation.

Contact Us

Ready to upgrade your power infrastructure with S18 Three-Phase Off-Circuit Tap-Changing Distribution Transformer? Email us at lijieelectrical@gmail.com for quotations, technical specifications, or project consultation.