Overview of 1250 kVA Transformer

1250 kVA Transformer Rated Voltage: Primary & Secondary Windings

Voltage compatibility is non-negotiable for seamless transformer operation, and the 1250 kVA Transformer is engineered to fit global and regional grid standards. Its design prioritizes flexibility, making it suitable for diverse applications:

Primary Winding Voltage: The transformer supports two common high-voltage inputs: 11kV or 33kV. This versatility means it can integrate with medium-voltage grids (used in industrial zones, suburban power networks, and commercial hubs) without additional modifications.
Secondary Winding Voltage: On the low-voltage side, it delivers a consistent 415V output—ideal for powering machinery, lighting, HVAC systems, and other low-voltage equipment in factories, warehouses, or multi-story buildings.

This voltage configuration eliminates the need for extra step-up/step-down components, simplifying your electrical setup and reducing potential points of failure.

1250 kVA Transformer Current Rating: Optimized for 50Hz/60Hz Grids

Current capacity directly impacts a transformer’s ability to handle load demands, and the 1250 kVA Transformer is rated for peak performance across global frequency standards:

额定电流: At its core, the 1250 kVA transformer delivers a maximum current of 1574A—enough to power heavy-duty industrial machinery (e.g., motors, compressors) or support high-density commercial loads (e.g., data centers, shopping malls) without overheating.
Frequency Compatibility: It operates seamlessly at either 50Hz or 60Hz, the two most common grid frequencies worldwide. This makes it a versatile choice for projects in regions like Europe, Asia (50Hz) or North America (60Hz), eliminating the need for frequency-specific models.

With this current and frequency range, the transformer maintains stable power delivery even during moderate load fluctuations.

1250 kVA Transformer Efficiency: Balancing Performance & Energy Savings

Efficiency is a top priority for reducing operational costs and meeting sustainability goals—and the 1250 kVA Transformer excels here:

Efficiency Range: Typically, it achieves an efficiency of 95% to 98%, depending on the load. At full load, efficiency peaks (often near 98%), while partial loads (e.g., 50-75% capacity) still maintain 95%+ efficiency—far above the minimum standards for most industrial transformers.
Why Efficiency Matters: A 95-98% efficiency rating translates to less energy waste (in the form of heat), lower electricity bills, and a smaller carbon footprint. For facilities running 24/7, this can result in significant long-term savings.

The transformer’s efficiency is further enhanced by high-quality core materials (e.g., grain-oriented silicon steel) and optimized winding designs, ensuring it performs reliably for decades.

Why Choose a 1250 kVA Transformer?

The 1250 kVA Transformer stands out for its blend of flexibility, power, and efficiency. It’s the go-to choice for:

Industrial facilities (manufacturing plants, refineries) needing to power heavy machinery.
Commercial complexes (malls, hotels, office towers) with high-density electrical demands.
Municipal or utility projects (substation upgrades, residential area 配电) requiring medium-to-low voltage conversion.

When selecting a 1250 kVA transformer, always prioritize models that meet international standards (e.g., IEC, ANSI) to ensure safety, durability, and compliance with local electrical codes.

Whether you’re evaluating specifications or planning a purchase, the 1250 kVA Transformer delivers the performance and reliability needed to keep your operations running smoothly. For customized solutions or further questions about its application, reach out to a trusted electrical equipment provider today.

Advantages of 1250 kVA Transformer

Flexible standard adaptation: Supports international standards such as GB, IEC, and UL, with customization available based on customer requirements;

Multi-national authoritative certifications: Certified by ISO, CE, UL, etc., ensuring reliable quality;

High efficiency: Exceeds 99% efficiency, complying with the European Tier 2 energy efficiency regulation (2015/2014/548/EC) for excellent energy savings;

Maintenance-free operation: Features IP65 protection class for dust and moisture resistance, with a design life of over 25 years for hassle-free use;

Environmental friendliness: Optional FR3 vegetable oil, meeting environmental protection and sustainable development needs;

Strong overload capacity: Copper coil design allows short-term overload up to 150% of rated capacity (maximum 2 hours), with only oil temperature monitoring required (≤95℃).

1250 kVA Transformer Technical Parameters

DESCRIPTION	RATINGS
Manufacturer	Lihe
Country of manufacturing	Jiangsu, China
Rated Power	1250 kVA
Cooling Method	ONAN
Vector Group	Dyn11
Rated frequency	50 Hz
Rated Primary Voltage (Uo)	33 kV rms
Insulation voltages (Primary Side) Rated Voltage (Ur) Power frequency withstand (Up) for 1minute Impulse Withstand Voltage (Ud)	≥36kV rms ≥70kV rms ≥ 170kV peak
Off-circuit Tap Changer Tap steps Tap Positions	5 steps 2.5% taps -5%, -2.5%, 0, +2.5%, +5%
Secondary voltage at no load: Between phases: Phase to neutral:	400 V rms 230 V rms
Secondary Insulation Level	1000 V rms
Transformer losses No-load Loss Full Load loss	≤1825W ≤12430W
1250 kVA Transformer Full Load Current	1574A
Full load efficiency (@100% load, 0.8PF)	≥ 98.5%
Voltage regulation	≥ 4.75%
1250 kVA Transformer Impedance Voltage	6.5 %
Site Altitude	2000 m
HV winding Insulation class LV winding insulation class	A (105 °C) A (105 °C)
Temperature rise Windings Oil Top	60 °C 55 °C
1250 kVA Transformer Dimensions Overall Length Overall Width Overall Height	≤ 2100 mm ≤ 1300 mm ≤ 2500 mm
1250 kVA Transformer Oil Capacity	550kg
1250 kVA Transformer Weight	≤4500 kg

1250 kVA Transformer Case Display

The 1250 kVA Transformer Case Display stands as an authoritative, highly readable showcase for this medium-to-high-capacity power critical equipment. It emphasizes the transformer’s robust structural engineering, optimized energy efficiency, and consistent performance under fluctuating load conditions—core traits ensuring reliable power transmission.

It also details the unit’s broad applicability: industrial facilities, mid-sized commercial complexes, and critical infrastructure like data centers or municipal power distribution networks. This display lets viewers quickly grasp the transformer’s adaptability and its role in securing stable power for diverse high-demand scenarios.

1250 kVA Transformer Business Cooperation

1250 kVA Transformer Business Cooperation stands as a strategic collaboration dedicated to providing reliable, high-performance power solutions for industrial, commercial, and infrastructure sectors. This partnership focuses on delivering transformers engineered for stable load handling, efficient energy transmission, and long-term operational durability—ideal for scenarios like mid-to-large industrial facilities, regional power distribution networks, commercial complexes, and municipal infrastructure projects.

By integrating expertise in transformer manufacturing, technical customization, and post-sales support, cooperating parties ensure seamless alignment with clients’ power system requirements: optimizing energy efficiency, reducing operational downtime, and meeting strict industry safety standards. This collaboration not only addresses immediate power supply needs but also builds a scalable foundation for clients’ sustainable infrastructure growth.