three phase oil immersed power transformer
1.Lower loss, ultra-energy-saving
2.On-load voltage regulation, no power outage, more stable voltage
3.Low noise, quiet operation
4.Strong short-circuit resistance, safe and reliable
5.Fully sealed, maintenance-free, long service life
6.Suitable for scenarios such as power grids, factories, residential areas, and commercial establishments
I. Product Introduction
The SZ11 on‑load tap‑changing oil‑immersed power transformer is a core piece of equipment for power transmission and distribution with high performance, low loss and high reliability. Adopting an optimized iron core structure and advanced on‑load voltage regulation technology, it can realize accurate, continuous and automatic voltage regulation under live load conditions, effectively ensuring power supply quality and system stability.
With the core advantages of ultra‑low loss, low noise, strong short‑circuit withstand capability and long service life, this product is widely used in scenarios with extremely high requirements for power quality and reliability, such as urban power grids, industrial parks, commercial complexes, hospitals, schools and data centers. It is key equipment for energy saving and stable operation in modern power systems.
II. Technical Parameters（customizable）
Rated capacity: 100 kVA ～ 2500 kVA
Rated voltage: 10 kV / 0.4 kV
Voltage regulation: On‑load tap‑changing (OLTC), smooth and uninterrupted voltage regulation
Cooling mode: ONAN (Oil‑Immersed Natural Air Cooling), high heat dissipation efficiency
Connection group: Dyn11, Yyn0 (optional as required)
Insulation level: LI75 / AC35, excellent impact resistance and corona resistance
Executive standards: GB 1094, GB/T 6451, in compliance with national and industrial highest standards
Operating environment: Stable operation suitable for high altitude, large temperature difference, dusty and humid environments
III. Main Features
High‑level energy saving
Adopting high‑permeability oriented silicon steel sheet and optimized magnetic circuit design, the no‑load loss and load loss are greatly reduced compared with traditional models, significantly lowering the whole life cycle energy consumption and making long‑term operation more economical.
Stable voltage regulation
Equipped with high‑performance on‑load tap‑changer, it can adjust voltage steadily with no power interruption when load changes, ensuring stable and high‑quality power supply.
Ultra‑low noise
Optimized body structure, low vibration design and effective noise reduction structure make the operation quieter, especially suitable for residential areas, commercial areas and other noise‑sensitive places.
Strong short‑circuit withstand capability
The winding and overall structure are firmly designed with high mechanical strength, strong resistance to short‑circuit impact, safe and stable operation, and high reliability.
Fully sealed structure & easy maintenance
Fully sealed structure can effectively prevent insulation oil aging, oxidation and oil leakage. It is basically maintenance‑free during operation, reducing daily maintenance workload and cost.
Complete protection & long service life
With complete protection devices and reliable design, the transformer features stable operation, strong environmental adaptability and long service life.
IV. Application Scenarios
Suitable for places with high requirements for voltage stability and energy efficiency, including urban power grids, industrial parks, residential quarters, commercial buildings, hospitals, schools, data centers, industrial and mining enterprises.
