33kV Dry Type Transformer

Engineered for Medium-Voltage Distribution Where Safety and Space Both Matter

When your project calls for a 33kV dry type transformer, you're typically dealing with one of three scenarios: an indoor substation with strict fire-safety codes, a high-rise or commercial complex where oil-filled units are prohibited, or a renewable energy site (solar/wind) where the transformer sits close to sensitive equipment. CHBEB (Beierbian Group Co., Ltd.) manufactures 33kV dry type transformers across our Zhejiang and Nanjing production bases, backed by 15+ R&D engineers and over 120 patents in transformer design.

Our 33kV dry type transformer product line is built on cast-resin (epoxy resin vacuum casting) technology, delivering the insulation performance and mechanical strength required for reliable operation in industrial, commercial, and infrastructure environments where oil-based solutions are not an option.

Every 33kv dry type transformer we produce is manufactured with vacuum-cast epoxy resin windings, giving it the moisture resistance and mechanical robustness needed for humid coastal sites, desert environments, or dust-heavy industrial plants - without the fire and leakage risks associated with liquid-filled designs.

We know that a "33kV dry type transformer" spec sheet alone won't satisfy a procurement engineer running due diligence. That's why every unit undergoes:

• 100% factory routine testing before shipment
• HiPot testing up to 100kV AC RMS
• BIL (Basic Insulation Level) capability to 300kV
• Partial discharge testing, with applied potential up to 100kV and induced potential exceeding 70kV
• Compliance verification against IEC 60076, IEEE C57.12.91, and GB/T national standards

Incoming raw materials are also controlled at source - our silicon steel is sourced from Baowu Steel (Grade A), and insulation materials include DuPont Nomex® and Vishay® components, ensuring consistency batch after batch.

Trust in a 33kV dry type transformer shouldn't rest on marketing claims alone. Our quality system is independently verified by:

• KEMA (Netherlands) and CQC third-party inspection
• National Transformer Quality Supervision and Inspection Center certification
• ISO 9001, ISO 14001, ISO 45001 management system certifications
• CE, CCC, GOST-R product certifications

Our quality control team of 30+ specialists completes 200+ hours of specialized training annually, with full CNAS-standard certification. Production-line control includes core lamination precision of ±0.02mm and inter-turn withstand voltage testing on every winding.

5000 kVA dry type transformer installed in an underground metro

substation powering traction systems.

Behind every 33kV dry type transformer is a physical production process: epoxy resin vacuum casting, winding assembly, core lamination, and full factory acceptance testing (FAT) - carried out across facilities totaling 100+ acres, supporting 3 Billion RMB in annual output value. Our clients include State Grid, China Southern Power Grid, and Sinopec, and our units have shipped to 17+ countries through a network of 20+ global distributors, including projects in Russia, Uzbekistan, Vietnam, Turkey, Spain, and the Middle East.

For overseas buyers, we also offer:

Remote video factory audits and remote FAT witnessing
Export-grade packaging with optional shock/tilt indicators
Moisture-protection packing tailored to dry-type products for long-distance sea freight
 

Every 33kV dry type transformer ships with:

• 3-year warranty on the complete unit
• 2-year warranty on components
• Lifetime technical maintenance guidance
   

Lead Time

• Standard production: 3–6 weeks
• Expedited orders: as fast as 1 week (subject to specification and order volume)

Whether you're an EPC contractor sourcing for a substation upgrade, a distributor building out a regional inventory, or an engineering firm specifying equipment for a renewable energy project, our 33kV dry type transformer is designed to meet international grid requirements with documented, third-party-verified quality - not just data-sheet promises.

Ready to discuss your project specifications?

Contact our technical team for a customized quotation, including drawing review, product selection support, and certification documentation for your import compliance process.