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12.5 MVA Current Power Transformer

Name: 12.5 MVA Current Power Transformer
Brand: NGG POWER TECH INDIA PRIVATE LIMITED
Price: 12740000.00 INR
Availability: InStock

Price 12740000.00 INR/ Unit

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MOQ : 1 Unit

12.5 MVA Current Power Transformer Specification

Capacity
12,500 kVA

Low Voltage
11,000 V

Load Loss
Approx. 45 kW

Voltage Booster Type
Tap Changer Equipped

Operating Temperature
-25°C to +45°C

Coil Material
High Conductivity Copper

Cooling Type
ONAN (Oil Natural Air Natural)

Dimension (L*W*H)
Approx. 4200 mm x 2200 mm x 2800 mm

High Voltage
33,000 V

Rated Voltage
33 kV / 11 kV

Product Type
Oil-Immersed Power Transformer

Material
Copper, Silicon Steel, High-grade Insulation

Output
12.5 MVA Continuous Rated

Frequency (MHz)
50 Hz

Efficiency
Up to 99.3%

Phase
Three Phase

Usage
Electrical Power Transmission

Coil Structure
Layer Winding

Coil Number
Multiple Winding Coils

Power Scope
12.5 MVA

Weight
Approx. 29,600 kg

Impedance Voltage
10.5% at rated current

Tap Changer Range
+5% to -10% in 2.5% steps

Cooling Medium
Mineral transformer oil

Vector Group
Dyn11

Tank Construction
Hermetically sealed

Core Construction
Mitered step-lap laminated core

Noise Level
Less than 65 dB at 1 meter

Protection Level
IP54

Bushing Type
Porcelain, oil-filled

Dielectric Strength
Ability to withstand up to 70 kV (1 min) power frequency test

Insulation Class
Class A/B

Short Circuit Withstand
Withstands rated short-circuit forces for 2 seconds

No Load Loss
14 kW

Altitude Suitability
Up to 1000 m above sea level

Standard
IS 2026 / IEC 60076

12.5 MVA Current Power Transformer Trade Information

Minimum Order Quantity
1 Unit

Supply Ability
500 Units Per Month

Delivery Time
30 Days

Main Domestic Market
All India

About 12.5 MVA Current Power Transformer

Backed by years of industrial experience in manufacturing and supplying 12.5 MVA Current Power Transformer, we offer superior quality transformer that is fabricated using supreme quality raw materials that are obtained from trustworthy sources. Offered transformer is suitable for power distribution. Our transformer is acknowledged for its features such as high performance, low noise, corrosion resistance, easy operation and long functional life. The 12.5 MVA Current Power Transformer is well checked on predefined quality parameters by our team of quality controllers.

Product Details

Voltage Ratio	33kV/433V
Brand	NGG Power Tech India Pvt Ltd
Usage/Application	Industrial
Phase	Single Phase
Cooling Type	Oil Cooled
Winding Material	Copper
Power Rating	12.5MVA
Standards	IS-2026,IEC-60076

Reliable Power Transformation for Transmission Needs

The 12.5 MVA transformer is meticulously designed for large-scale transmission networks, balancing high performance with safety. Its robust copper windings, high dielectric strength, and sophisticated insulation ensure stable operation even under demanding conditions. The hermetically sealed tank and IP54 protection level enhance reliability, minimizing maintenance and prolonging lifespan.

Advanced Features and Compliance

Meeting IS 2026 and IEC 60076 standards, this transformer incorporates a mitered step-lap core for reduced loss and noise levels below 65 dB. The ONAN cooling system, porcelain bushings, and mineral oil filling guarantee effective thermal management and high operational safety. Its dynamic tap changer offers voltage regulation flexibility necessary for modern grids.

FAQs of 12.5 MVA Current Power Transformer:

Q: How does the ONAN cooling system benefit the 12.5 MVA transformer?

A: The ONAN (Oil Natural Air Natural) cooling system dissipates heat efficiently by circulating mineral oil and using ambient air, ensuring optimal operating temperature and prolonging the transformers lifespan. This passive cooling method is reliable and requires minimal maintenance.

Q: What protection features does the hermetically sealed tank provide?

A: The hermetically sealed tank, coupled with an IP54 protection level, safeguards internal components from moisture, dust, and contamination. This design maintains oil purity, reduces the risk of dielectric breakdown, and extends service intervals.

Q: When should the tap changer be operated and what is its range?

A: The tap changer is used when voltage regulation is required due to grid fluctuations or load changes. It allows for voltage adjustment from +5% to -10% in 2.5% steps, enabling adaptation to varying transmission conditions without service disruption.

Q: Where is this transformer suitable for installation?

A: Designed for power transmission, the 12.5 MVA transformer operates reliably at altitudes up to 1000 meters above sea level and in environmental temperatures ranging from -25C to +45C. Its noise reduction features make it suitable for installation close to residential or urban areas.

Q: What is the process for maintaining the transformers high efficiency?

A: To preserve its 99.3% efficiency, regular inspections for oil quality, bushing integrity, and tap changer operation are recommended. Maintaining the mineral oils dielectric strength and monitoring temperature and noise levels help ensure reliable performance.

Q: What are the benefits of using high-grade copper and silicon steel materials?

A: High conductivity copper windings lower internal losses, while the layered silicon steel core reduces eddy currents and enhances magnetic performance. These materials contribute to superior efficiency, reduced operational losses, and extended service life.

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