Power Transformer
Maximizes transmission efficiency and power capacity between high-voltage utility networks.
Core Components & Advantages
Main & Conservator Tank
Heavy-gauge steel enclosure designed to accommodate thermal oil expansion.
Core & Winding Assembly
High-efficiency copper windings engineered for superior performance and reduced material volume.
On-Load Tap Changer (OLTC)
Motor-driven tap changer providing real-time voltage regulation while operating under full load.
High-Voltage Bushings
High-BIL porcelain or RIP bushings engineered for bulk transmission power connections.
Radiators & Cooling Fans
Banked cooling fins and forced-air blowers (ONAF/ODAF) for efficient thermal dissipation.
Buchholz Relay
Protective gas and oil-surge relay providing early detection of internal transformer faults.
Bushing & Grounding
Terminal arrangement supporting solid or impedance-grounded transmission networks.
Pressure Relief Device
Mechanical safety valve that safely vents excessive internal gas and pressure surges.
Critical Infrastructure Features (7)
Common-Wound Topology
Shared winding design reduces physical size, weight, and core losses compared to conventional isolation transformers.
Motorized OLTC
Automated tap changer regulates transmission voltage under continuous full-load operation without service interruption.
Conservator Tank with Bladder
Sealed expansion system prevents moisture and oxygen contamination of insulating dielectric fluid.
Buchholz & Surge Protection
Dual-element protective relay detects minor gas buildup and trips during high-velocity oil surge events.
High BIL Insulation
High basic impulse insulation withstands severe lightning strikes and switching transients.
Seismic & Wind Anchoring
Heavy-duty base frame engineered to satisfy IEEE 693 and IBC seismic requirements.
Low-Loss Silicon Steel Core
High-permeability grain-oriented laminations minimize continuous no-load excitation losses.
Additional Benefits
Transmission Grid Interconnection
Designed for high-capacity step-up and step-down applications across major regional transmission networks.
Lower Operating Costs
Exceptional efficiency (>99.5%) minimizes lifetime energy losses in high-power transmission systems.
Continuous Reliability
Substation-grade construction supports demanding 24/7 industrial and utility operating conditions.
Eco-Friendly Fluid Compatibility
Compatible with high-flash-point natural ester bio-fluids (>300°C) to reduce environmental and fire risks.
Details
General Specifications
Rating
10 to 500 MVA (and higher)
Primary Voltage
115 kV to 765 kV Transmission
Secondary Voltage
34.5 kV to 230 kV Sub-Transmission
Tertiary Voltage
13.8 kV (for stabilization / auxiliary loads)
Frequency
60 Hz
Core Material
Grain-Oriented Silicon Steel
Conductor
High-Conductivity Copper
Insulating Oil
Mineral Oil / Natural Esters
Impedance
8.0% to 14.0%
Efficiency Standard
>99.5%
Applied Standard
IEEE Std C57.12.00 / IEC 60076
Frequently Asked Question (FAQ)
PE Transformer
Engineered with focus on quality control, operational stability, and dependable system performance.