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S18 type fully sealed distribution transformer

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.

Product Description

S18 Type Fully Sealed Distribution Transformer - Advanced Power Solution

The S18 type fully sealed distribution transformer from Suqian Lijie Electric Technology Co., Ltd. delivers enterprise-grade performance with 10-20% lower losses than S13 models. Our transformers feature a fully sealed corrugated oil tank design with ONAN cooling, high-permeability cold-rolled grain-oriented silicon steel core (0.23mm grade), and all-copper windings. With a 30-year design life, 5-level non-excitation voltage regulation, and maintenance-free operation, you get uninterrupted 24-hour power supply backed by our company's annual sales exceeding 5 billion RMB and certifications including ISO 9001:2015, CE, and IEC standards.

S18 type fully sealed distribution transformer

Why Choose Our Fully Sealed Distribution Transformer?

You require control hardware that works dependably day after day. Our transformer combines demonstrated innovation with present day fabricating standards.

The completely fixed layered oil tank disposes of the require for oil conservators. This implies you won't stress around oil support or checking oil levels. The plan keeps contaminants out and amplifies gear life significantly.

Superior Center Technology

Your transformer's heart things. We utilize high-permeability cold-rolled grain-oriented silicon steel sheets with completely diagonal joints and no punching. This development decreases commotion and minimizes vitality misfortunes. You'll take note calmer operation and lower power bills.

The multi-level joint plan guarantees ideal attractive flux dispersion. This deciphers to way better effectiveness amid crest and low-load conditions.

Robust Winding Construction

All-copper windings give prevalent conductivity and warm dissemination. The high-voltage round and hollow and low-voltage thwart plans make uniform oil channels all through the unit. This designing gives you solid short-circuit resistance when you require it most.

Your control remains steady indeed amid electrical flaws. The winding course of action handles push way better than routine plans.

Technical Specifications

Here are the detailed parameters for our S18 type fully sealed distribution transformer:

Parameter Specification
Voltage Level 6kV, 12kV
Capacity Range 30-3150kVA
Voltage Regulation Non-excitation, ±5%, ±2×2.5%
Frequency 50Hz / 60Hz
Phases Single-phase, Three-phase
Connection Group Yyn0 or Dyn11
Cooling Method ONAN (Oil-immersed self-cooling)
Protection Level IP00 (IP30+ for outdoor substations)
Design Life ≥30 years
Power Frequency Withstand AC-35kV
Impulse Withstand Voltage L1-75kV
Operating Temperature Maximum 40°C outdoor

S18 type fully sealed distribution transformer

Perfect Applications for Your Needs

Where can you use this transformer? The versatility surprises many customers:

  • Urban and rural power grids - Reliable distribution for communities
  • Industrial plants - Handles heavy machinery loads
  • Commercial buildings - Quiet operation for office environments
  • New energy facilities - Compatible with solar and wind integration
  • Manufacturing facilities - Consistent power for production lines

The standardized plan adjusts to most establishments. Require something extraordinary? We offer customization to coordinate your particular requirements.

Our Manufacturing Excellence

You merit straightforwardness around who makes your hardware. Lijie Electric works two major fabricating bases in Xuzhou and Nantong, covering 500,000 square meters. Over 2,000 workers, counting 160+ engineers with doctoral and master's degrees, guarantee quality at each generation stage.

Every transformer passes thorough testing by China's National Transformer Quality Supervision and Assessment Center and Wuhan Tall Voltage Inquire about Founded. Our quality administration takes after GB/T 27922-2021 standards.

We've earned acknowledgment as a "National High-Tech Endeavor" and "Quality-Trusted Endeavor" in Jiangsu Area. These respects reflect our commitment to excellence.

Global Reach and Support

Your extend area doesn't restrain your choices. We serve clients over Australia, Modern Zealand, India, Vietnam, Malaysia, Indonesia, Kazakhstan, Egypt, Kenya, and numerous other countries.

You'll get comprehensive back counting:

  • Installation guidance from experienced technicians
  • Complete technical documentation (drawings, manuals, test reports)
  • Spare parts supply when needed
  • Responsive after-sales service

Production cycles range from 6 to 30 days depending on specifications and quantities. We maintain capacity to handle both small orders and large-scale projects.

S18 type fully sealed distribution transformer

Frequently Asked Questions

Q: What makes the S18 transformer better than older models?

A: The product reduces energy losses by 10-20% compared to S13 transformers. Lower losses mean reduced operating costs over the unit's 30-year lifespan. The fully sealed design also eliminates regular maintenance requirements.

Q: How does the fully sealed design benefit me?

A: You avoid oil monitoring, conservator maintenance, and contamination risks. The corrugated tank expands and contracts with temperature changes, maintaining proper pressure without external systems. This design reduces long-term operating costs significantly.

Q: Can you customize transformers for special requirements?

A: Yes. While we offer standardized designs for common applications, our engineering team can modify specifications for voltage levels, capacity, connection types, or environmental conditions. Contact us with your specific needs.

Q: What certifications do your transformers carry?

A: All units meet ISO 9001:2015, CE, IEC, and UL standards. We hold CQC and PCCC energy efficiency certifications. Each transformer comes with test reports and certification documentation.

Q: How quickly can you deliver?

A: Standard configurations typically ship within 6-15 days. Custom specifications may require 15-30 days depending on complexity. We provide production tracking so you know exactly when to expect delivery.

Contact Us

Ready to upgrade your power distribution with S18 type fully sealed distribution transformer? Reach out to our team at lijieelectrical@gmail.com for technical specifications, quotes, or project consultation.

Customer reviews background image

Here are some reviews from our users:

April 27, 2025

With a tight project schedule, the manufacturer delivered on time, and on-site technical personnel provided guidance throughout the entire installation and commissioning process; the collaboration was highly efficient and hassle-free.

July 2, 2025

During the preliminary phase, a selection plan was custom-tailored based on the actual site load requirements, resulting in a high degree of parameter compatibility. After-sales support responds within two hours, and ongoing technical support for operation and maintenance is comprehensive; we feel completely confident in a long-term partnership.

November 18, 2025

Deployed as a supporting component for a 35kV grid-connection project at a photovoltaic power station, the equipment operates for an average of 16 hours daily. It demonstrates excellent control over no-load losses, ensures smooth power generation and grid integration, and effectively reduces the station's overall energy consumption.

January 30, 2026

Under the continuous, high-load operating conditions of a factory production line, the equipment maintains stable electrical parameters and exhibits strong overload resistance, thereby guaranteeing an uninterrupted power supply for industrial production.

April 3, 2026

Integrated as a supporting component for a new energy photovoltaic grid-connection system, the manufacturer provided professional technical coordination and timely after-sales support, ensuring seamless adaptation to the specific electrical operating conditions required for grid integration.

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