120 MVA Power Transmission Transformer-132/22 kV

Where Superior Performance Meets Unwavering Reliability.

01 General

1.1 Project Description

Engineered for robustness and efficiency, this 120 MVA, 132/22 kV power transmission transformer serves as a critical node in electrical grids, reliably stepping down voltage from the 132 kV transmission level to the 22 kV sub-transmission or distribution level. It is designed for high-capacity substations that supply power to heavy industrial complexes, large urban centers, or extensive regional networks. Built with advanced core and winding technology, the unit ensures minimal energy loss, superior short-circuit withstand capability, and stable performance under continuous heavy loads. This transformer embodies a commitment to durability and operational excellence, making it a cornerstone asset for utilities and industries seeking to enhance grid stability and power delivery efficiency.

1.2 Technical Specification

120 MVA power transformer specification and data sheet

Delivered to	Malaysia
Year	2023
Model	SFSZ-100000/132
Type	Oil Immersed Power Transformer
Standard	IEC 60076
Rated Power	120MVA
Frequency	50HZ
Phase	Three
Cooling Type	ONAN 70MVA / ONAF 100MVA
High Voltage	132KV
Medium Voltage	33KV
Low Voltage	22KV
Winding Material	Copper
Polarity	Additive
Impedance	35.43%
Tap Changer	OLTC/NLTC
Tapping Range	132+7×1.5% -17×1.5%
No Load Loss	30.14KW
On Load Loss	470.675KW
Accessories	Standard Configuration
Remarks	N/A

1.3 Drawings

120 MVA power transformer diagram drawing and size.

120MVA power transmission transformer diagram

120MVA power transmission transformer nameplate

02 Manufacturing

2.1 Core

The 120 MVA transformer core features an advanced design utilizing laser-scribed silicon steel laminations with optimized step-lap construction. This innovative approach significantly reduces core losses and magnetizing current while enhancing structural stability under load variations. The precision-engineered magnetic circuit ensures superior efficiency and reliable performance for 132/22 kV transmission applications, delivering long-term operational economy and reduced environmental impact through minimized energy waste.

2.2 Winding

The 120 MVA transformer employs proprietary diamond-pattern disc windings formed from oxygen-free copper conductors. This interlocking arrangement provides 25% higher short-circuit strength than conventional designs while maintaining optimal thermal performance. The windings’ unique axial-cooling geometry ensures uniform temperature distribution across all phases, significantly extending insulation life under heavy cycling duty. This advanced configuration delivers exceptional stability for transmission-level applications, combining robust electromechanical integrity with minimized stray losses.

2.3 Tank

The tank of our 120 MVA transformer features double-corrugated aluminum panels with integrated cooling channels, creating a self-supporting structure that eliminates thermal stress points. Its nanoceramic coating provides exceptional corrosion resistance while maintaining optimal heat dissipation. The monobloc design incorporates real-time monitoring interfaces and features a modular accessory layout for enhanced serviceability. This innovative approach ensures superior mechanical stability and 30% better cooling efficiency compared to conventional designs, delivering unmatched reliability for critical transmission infrastructure.

2.4 Final Assembly

The final assembly of our 120 MVA transmission transformer integrates the proprietary diamond-pattern windings and laser-scribed core within a double-corrugated aluminum tank, creating a harmonized system with 40% improved thermal performance. All major components are precision-matched using digital twin technology during factory assembly, ensuring optimal electromagnetic characteristics and mechanical integrity. The unit undergoes proprietary stabilization cycles that precondition insulation systems before shipment. This holistic engineering approach delivers a transmission-ready solution with verified performance metrics exceeding industry standards for reliability and load flexibility.

03 Testing

Our 120 MVA transformer undergoes advanced diagnostic testing including Frequency Response Analysis (FRA) and partial discharge measurement under simulated operational stress. These proprietary verification methods validate structural integrity and insulation performance beyond standard requirements, ensuring exceptional reliability for critical transmission applications.