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.
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.

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.
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.
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.
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 |

Where can you use this transformer? The versatility surprises many customers:
The standardized plan adjusts to most establishments. Require something extraordinary? We offer customization to coordinate your particular requirements.
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.
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:
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.

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.
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.
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