In metallurgy, electrolysis, chemical engineering, heavy manufacturing, mining, and new materials industries where 7×24-hour continuous production is required, the stability, overload capacity, energy efficiency, and service life of transformers directly determine production safety, energy consumption costs, equipment uptime, and project return on investment. For industrial users demanding long-term reliability and low maintenance, a proven integrated transformer solution delivers far greater long-term value than individual products. Today I am sharing a mature and reliable 11kV oil‑immersed transformer package solution that has been verified in multiple industrial projects. It covers design, material selection, structural technology, protection systems, and after‑sales service to achieve high efficiency, safety, low maintenance, and long service life.
1. Complete Configuration (4 Units Total)
Specially designed for high‑power rectifier loads + plant power distribution, this solution physically separates rectifier and power loads to eliminate harmonic interference, voltage fluctuations, and cross‑equipment interference:
- Rectifier Transformer ZS‑5000kVA/11kV/0.66kV × 2 units
- Power Transformer S11‑2500kVA/11kV/0.4kV × 1 unit
- Power Transformer S11‑630kVA/11kV/0.4kV × 1 unit
All units follow a unified indoor installation design for standard workshop layout, easy installation, neat wiring, and convenient maintenance. This setup isolates rectifier harmonics, protects motors, pumps, fans, compressors, PLC systems, and precision instruments, and is ideal for continuous‑production facilities to minimize unplanned downtime.
2. Core Advantages | Customer Value Highlights
✅ Strong Overload Capacity for Heavy & Peak Loads
- Rectifier transformers support 110% continuous long‑term overload
- Power transformers support 100% continuous full load
- 5‑step off‑circuit manual voltage regulation: ±2×2.5%
- Optimized short‑circuit impedance limits fault current and protects downstream devices
✅ 12‑Pulse Rectifier Design | Grid‑Friendly & Low Harmonics
- Vector group: D/d0 y11, standard 12‑pulse topology
- Effectively suppresses 5th, 7th, and other major harmonics
- Improves power factor and reduces electromagnetic interference
- Meets grid connection standards and reduces filter investment
✅ Low Temperature Rise & 30‑Year Design Life
- Oil temperature rise ≤ 55K; winding temperature rise ≤ 65K
- Class A insulation with oil‑paper composite insulation system
- Low‑loss core and oxygen‑free copper windings for high energy efficiency
- Leak‑proof and anti‑loosening structure for stable long‑term operation
✅ Core‑Lifting Free Design | Fast Commissioning
- Fully assembled and tested at factory; no on‑site core inspection needed
- All fasteners with anti‑loosening treatment for safe transportation
- Phosphated tank with high‑strength coating: no leakage, no peeling, no fading
- Significantly reduces installation and commissioning time
3. Structure & Premium Materials
- Core: High‑permeability low‑loss silicon steel with full mitered joint, reduced inrush current, no‑load loss, and noise
- Windings: High‑purity oxygen‑free copper, layer or disc type, uniform ampere‑turn distribution, excellent short‑circuit withstand strength
- Insulation System: Rigid paper cylinder with support strips, high mechanical strength, low partial discharge
- Transformer Oil: Grade 25 high‑quality oil, pour point ‑25°C, breakdown voltage ≥35kV, moisture <15ppm
- Tank: Steel welded structure with phosphating treatment, strong corrosion resistance
- Terminal Box: IP54, flame‑retardant, moisture‑proof, 20% spare terminals reserved
- Cables: Oil‑resistant, flame‑retardant, shielded cables for strong anti‑interference performance
4. Full‑Dimension Protection System
- Buchholz Relay: Light gas alarm; heavy gas trip
- Pressure Relief Valve: With signal contacts, overpressure protection
- Temperature Protection: Oil over‑temperature alarm, external digital display
- Oil Level Monitoring: Abnormal oil level alarm
- Thermostat: High‑precision, with remote transmission and linkage control
- Comprehensive Protection: Early warning, fast tripping, status feedback
5. Strong Environmental Adaptability
- Altitude: ≤1500m
- Ambient temperature: ‑25°C ~ +40°C
- Seismic intensity: Grade 9
- Relative humidity: ≤85%
- Application: Indoor installation, standard workshops, power distribution rooms
6. Standards, Quality & Service
- Designed and manufactured in accordance with GB 1094, JB/T 8636, GB/T 6451
- Full factory tests: no‑load, load, insulation, temperature rise, partial discharge
- Complete documents: drawings, test reports, certificates, manuals
- Warranty: 12 months
- Lifetime technical support and original spare parts supply
- Fault response: 4‑hour remote support; 24‑hour on‑site service
- Free installation guidance, commissioning, and training
7. Ideal for These Projects
- Metallurgy: electric furnaces, electrolysis, continuous casting, rolling mills
- Chemical: electrolysis, electrochemistry, DC power supply
- New factories & workshop expansion: main & auxiliary power distribution
- Renovation: replacement, energy saving, reliability upgrade
- High‑demand industrial projects requiring stability, long life, and low maintenance
📩 Contact Me for Your Custom Solution
WhatsApp: 0086 13613814286
Email: hengyuan6@hotmail.com
Message me directly to get:
- Customized transformer package design
- Full technical datasheet and dimension drawings
- Official quotation and lead time
- On‑site technical consultation and selection support
High‑quality transformers are not just equipment—they are the core guarantee of stable production.
We look forward to cooperating with industrial partners to build safe, efficient, reliable, and low‑maintenance power systems.
