Technical Specifications
▸ Equipment: 8 × 1250 kVA Hermetically Sealed Oil-Immersed Power Transformers
▸ Model: S15-H-1250/33
▸ Key Features:
33 kV/0.4 kV voltage conversion for industrial load supply
Full-copper windings (high conductivity, low resistance loss)
Dyn11 vector group for stable three-phase power output
ONAN (Oil Natural Air Natural) cooling system for energy-saving operation
DGPT protection relay (overload, short-circuit, temperature & voltage monitoring)
250A/36kV plug-in high-voltage terminals (tool-free maintenance, safe disconnection)
Four swivel casters (easy on-site positioning, load-bearing ≥5000kg)
Hermetically sealed structure (no oil leakage, moisture-proof, dust-proof)
Project Execution
▸ Collaborative Design: Co-developed with Italian industrial engineering firm to align with EN 50464 grid standards
▸ Customized Configuration:
▸ Local Compliance: Materials meet REACH and RoHS environmental regulations for EU markets
▸ Quality Control: 100% factory load testing (including short-circuit withstand and temperature rise tests)
Operational Results
| Metric | Achievement |
| System Uptime | 99.99% after 12 months of continuous operation |
| Energy Efficiency | 16% lower load losses vs aluminum-winding alternatives |
| Maintenance Frequency | Scheduled inspection only (no unscheduled downtime) |
| Installation Efficiency | 40% faster on-site deployment via plug-in terminals & casters |
Certifications & Standards
• IEC 60076-1/2 (Oil-immersed power transformers)
• EN 50464 (European standard for power transformers in industrial applications)
• CE marking (compliant with EU Low Voltage Directive 2014/35/EU)
• IP54 protection rating
• DGPT relay certified to IEC 60255
Client Benefits
▸ Reliable power support for precision manufacturing equipment (low voltage fluctuation)
▸ Cost reduction: Copper windings extend service life to 25 years; sealed design eliminates oil replacement costs
▸ Operational safety: Plug-in terminals reduce maintenance risk; DGPT relay provides multi-layer protection
▸ Flexibility: Swivel casters enable easy repositioning for plant layout adjustments
