1250 KVA Transformer

Phase
Three-phase
Brand
ChangHe
Standards
IEC; ANSI, IEEE, AS, etc.
Rated capacity
1250kVA
Frequency
50/ 60Hz
Rated voltage
11kv

 

Description

Description of 1250 KVA Transformer

Engineered for robust power distribution across industrial, commercial, and infrastructure projects, the 1250 KVA Transformer stands out as a reliable, high-performance solution—blending precise electrical specifications with adaptability to diverse grid demands. Below is a detailed breakdown of its core features and operational capabilities:

Core Electrical Specifications

Tailored to meet global power standards, this transformer is built to deliver consistent performance while aligning with voltage and frequency requirements of modern networks. Key design highlights include:

Voltage Ratings

Optimized for versatile grid integration, the primary winding supports 11kV or 33kV input voltages (configurable based on project needs), while the secondary winding steps down power to a practical 415V output—ideal for powering machinery, commercial buildings, manufacturing plants, and large-scale residential complexes.

Current & Frequency Compatibility

With a rated current of 1574A (calculated based on its 1250 KVA capacity and voltage configuration), the transformer efficiently handles load demands without compromising stability. It operates seamlessly at both 50Hz and 60Hz frequencies, making it suitable for use in regional grids worldwide.

Efficiency Performance

Designed for energy savings, the 1250 KVA Transformer achieves an efficiency range of 95–98%—a benchmark for minimizing energy waste in power distribution. This efficiency varies slightly with load conditions: it peaks at typical operating loads (around 50–75% of rated capacity) to reduce long-term operational costs and environmental impact.

Why Choose This 1250 KVA Transformer?

Beyond its technical specs, this transformer combines durability with user-centric design: it’s built to withstand fluctuating grid conditions, requires minimal maintenance, and adheres to international safety and quality standards (e.g., IEC, ANSI). Whether powering a factory, data center, or urban infrastructure, it delivers consistent, efficient power to keep operations running smoothly.

Parameter of 1250 KVA Transformer

Rated Power1250 kVA
Cooling MethodONAN
Vector GroupDyn11
Rated frequency50 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 Level1000 V rms
Transformer losses
No-load Loss
Full Load loss
≤1825W
≤12430W
1250 kVA Transformer Full Load Current1574A
Full load efficiency (@100% load, 0.8PF)≥ 98.5%
Voltage regulation≥ 4.75%
1250 kVA Transformer Impedance Voltage6.5 %
Site Altitude2000 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 Capacity550kg
1250 kVA Transformer Weight≤4500 kg

Feature of 1250 KVA Transformer

Unmatched Reliability & Efficiency

What sets this 1250 KVA Transformer apart is its blend of dependability and energy-saving performance:
 
  • Delivers consistent, stable power output across varying load conditions, making it a trustworthy backbone for critical electrical systems.
  • Boasts impressive operational efficiency, minimizing energy leakage to keep long-term running costs low—ideal for 24/7 industrial operations.

Versatile Application Scope

Engineered to thrive in diverse high-demand environments, it excels in:
 
  • Industrial setups: Motor control panels, pump systems, ventilation units, compressors, and commercial lighting infrastructures.
  • Power distribution: Substations, grid networks, and large-scale infrastructure projects, where it effortlessly handles heavy-duty power demands without compromising stability.

User-Centric Design & Future-Ready Features

Designed with practicality in mind, it offers:
 
  • Streamlined installation and user-friendly operation, reducing on-site setup time and labor costs.
  • Minimal maintenance requirements and rugged construction, ensuring extended operational longevity (often decades with proper care).
  • Future-ready upgrades: Integrates seamlessly with cutting-edge smart monitoring and remote control capabilities (a growing industry standard), enhancing operational visibility and further curtails energy wastage.

Why It Matters in Power Networks

As a cornerstone of electrical power generation, transmission, and distribution, this 1250 KVA Transformer balances durability, efficiency, and adaptability. Its ability to perform reliably under stress, coupled with material and design innovations, makes it the preferred choice for projects where downtime is not an option—from factories to urban infrastructure.