33/11 kV Oil-Immersed Power Transformers: Engineering Excellence
Regency Power Limited delivers high-voltage infrastructure designed for the modern grid. Our 33/11 kV transformers combine Tier-1 engineering precision with localized agility, ensuring maximum uptime and superior lifecycle value.
We don’t just sell equipment; we provide a partnership in power. Our joint-venture model delivers Tier-1 engineering quality at competitive price points, backed by a robust global supply chain and dedicated local support.
Our Ce rtifications: KEMA / CESI Type Tested
UL Compliant
ISO 9001:2015 Quality Management System
Category | Technical Detail |
Standards | IEC 60076, ANSI/IEEE C57.12.00, UL, KEMA, CESI |
Application | Outdoor / Indoor Substation Grade |
Tank Design | Bell-type or Rigidly Reinforced Conventional |
HV Bushings | Oil-Impregnated (OIP) or Resin Impregnated (RIP) |
LV Bushings | High-Grade Porcelain or Epoxy Resin |
Short-Circuit Rating | 2 Seconds (As per IEC 60076-5) |
Max Temp Rise | Oil: 50 K / Winding: 55 K (at 40°C Ambient) |
Partial Discharge | $< 100$ pC at $1.58 U_m / \sqrt{3}$ |
Surface Finish | Sandblasting (Sa2.5) + Zinc-rich Primer + MIO + Polyurethane |
At the heart of every Regency unit is a precision-engineered magnetic circuit designed to minimize energy waste and maximize longevity.
Hi-B Grade Core Material: We utilize high-permeability, grain-oriented silicon steel with step-lap mitered joints. This architecture drastically reduces No-Load Losses ($P_0$), lowers magnetizing current, and ensures quiet operation.
Winding Excellence: All windings are fabricated from Oxygen-Free Copper. For the 33 kV primary side, we employ Continuous Disc or Interleaved patterns to provide elite protection against lightning impulse voltage stresses.
Vapor Phase Drying (VPD): Using high-density pressboard and thermally upgraded paper, each unit undergoes a rigorous VPD process. We achieve absolute moisture extraction (reaching <0.5%) before high-vacuum oil filling to prevent insulation degradation.
Built to withstand extreme ambient temperatures and heavy-duty cycling without breaking a sweat.
Detachable Radiators: Hot-dip galvanized plate-type radiators provide optimal convective heat dissipation and ironclad corrosion resistance.
Intelligent Cooling (ONAN/ONAF): Our automated marshalling kiosks manage cooling transitions based on real-time winding temperature gradients, significantly reducing auxiliary power consumption.
- Hermetic Oil Preservation: A high-durability Rubber Diaphragm (Air Bag) in the conservator tank eliminates atmospheric contact, preventing oil oxidation and moisture ingress for life.
We provide "Smart Grid Ready" solutions that allow you to monitor your assets 24/7.
Dual-Stage Buchholz Relay: Advanced detection for internal gas accumulation or dielectric surges.
Fiber Optic Hot-Spot Sensing: (Optional) Direct, real-time monitoring of winding temperatures for precise load management.
Integrated CTs: Built-in multi-ratio, turret-type Current Transformers for seamless differential and overcurrent protection.
Mechanical PRDs: High-flow Pressure Relief Devices with integrated limit switches for remote alarm annunciation.
Eco-Friendly Options: Units can be customized for fire-resistant Synthetic or Natural Esters (K-class fluids).
Leak-Free Guarantee: CNC-machined flange surfaces and high-grade Nitrile gaskets ensure hermetic integrity.
98% Recyclable: At the end of its 30+ year service life, almost the entire mass (Copper, Steel, Oil) is fully recyclable.
Precision Fabrication
We utilize CNC core-cutting lines and automated vertical winding machines to ensure tight tolerances.
Global Validation
We facilitate KEMA or CESI witness testing upon request, giving you third-party proof of performance.
Full Lifecycle Support
We manage everything—from sea-worthy vacuum packaging to on-site nitrogen-to-oil processing and commissioning by our expert field engineers.