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750KVA Oil Immersed Power Transformer with YNd11 Connection and ONAN Cooling for Industrial Power Distribution
750KVA Oil Immersed Power Transformer with YNd11 Connection and ONAN Cooling for Industrial Power Distribution
Specifications
Rated freaquency :
60Hz
Tapping range :
±2x2.5%
Type :
S-M-750/13.8-0.48
Rated capacity :
750KVA
Rated current :
31.4/902.1 A
MOQ :
1 set
Price :
To be pending
Payment Terms :
L/C&T/T
Supply Ability :
300 SETS/YEAR
Delivery Time :
30 DAYS
Insulation class :
A
Connection group :
YNd11
Oil grade :
25# Oil
Brand Name :
Oil-immersed transformer
Model Number :
S-M-750/13.8-0.48
Place of Origin :
CHINA
Certification :
IEC 60076
Packaging Details :
Pallets
Description
S-M-750/13.8-0.48 Oil Immersed Power Transformer - 750KVA, 13800/480V, 60Hz, Three-Phase
The S-M-750/13.8-0.48 Oil Immersed Power Transformer is a three-phase, 60Hz power distribution unit engineered for step-down transformation from medium-voltage primary networks to low-voltage secondary distribution systems. Manufactured in China under GB certification, this unit delivers a rated capacity of 750KVA with primary and secondary voltages of 13800V and 480V respectively.
Technical Specifications
Product Model S-M-750/13.8-0.48
Rated Capacity 750 KVA
Phase Number 3-Phase
Rated Frequency 60 Hz
Rated Voltage 13800 / 480 V
Rated Current 31.4 / 902.1 A
Tapping Range ±2x2.5%
Connection Group YNd11
Ambient Temperature 28°C
Insulation Class A
Cooling Method ONAN (Oil Natural Air Natural)
Oil Grade 25# Transformer Oil
Certification GB Standards
Key Features
  • High Capacity and Current Rating: Rated at 750KVA with primary current of 31.4A and secondary current of 902.1A, supporting substantial load demands in industrial, commercial, and utility applications.
  • Voltage Transformation: Converts 13800V primary input to 480V secondary output, suitable for standard industrial and commercial distribution voltages.
  • Flexible Tapping Range: ±2x2.5% off-circuit tapping allows for precise voltage adjustment to compensate for grid fluctuations and load variations.
  • YNd11 Connection Group: Delta-connected primary and star-connected secondary with neutral grounding provides balanced phase displacement and supports both three-phase and single-phase loads.
  • ONAN Natural Cooling: Utilizes natural convection for heat dissipation without requiring external fans or pumps, reducing auxiliary power consumption and maintenance requirements.
  • Class A Insulation System: High-grade insulation materials provide reliable protection against electrical breakdown, thermal aging, and dielectric stress.
  • 25# Transformer Oil: Delivers superior dielectric strength and thermal conductivity, effectively dissipating heat and insulating internal components.
  • Ambient Temperature Rating: Engineered for stable operation at ambient temperatures up to 28°C.
  • GB Certification: Manufactured and tested in accordance with GB standards, ensuring compliance with Chinese and international quality requirements.
Applications
  • Industrial Facilities: Provides reliable voltage step-down for manufacturing plants, processing units, refineries, and heavy machinery operations requiring stable 480V power supply.
  • Commercial Buildings: Ensures continuous power delivery for high-rise office towers, shopping malls, hospitals, hotels, and educational institutions.
  • Residential Communities: Supports underground distribution networks and community substations for large-scale housing developments and apartment complexes.
  • Utility Sector: Deployed in utility substations for voltage regulation and efficient power distribution to residential areas and municipal infrastructure.
  • Infrastructure Projects: Installed in airports, railway stations, water treatment plants, and other critical public utility projects.
  • Renewable Energy Integration: Acts as a step-down transformer for solar farms and wind power collection systems requiring 480V AC distribution.
Packaging and Logistics

Packaging Method: Secured in heavy-duty wooden crates with internal foam cushioning and padding to prevent impact damage during inland and maritime freight. Each crate is clearly labeled with handling instructions, product identification, and shipping marks for easy tracking.

Place of Origin: CHINA

Compliance: Designed and manufactured in accordance with GB standards, ensuring seamless integration into existing power distribution infrastructures worldwide.

Delivery Time: Subject to actual order quantity and production schedule. Please contact our sales team for confirmed lead time.
Pricing and Payment: To be negotiated based on order volume, technical specifications, and Incoterms. Please contact our sales team for detailed quotation.
Technical Support and After-Sales Services
  • Installation Guidance: On-site or remote technical assistance for proper installation, connection, and commissioning procedures.
  • Operation and Maintenance Support: Comprehensive documentation and expert guidance for routine maintenance schedules, oil testing, and component inspection.
  • Troubleshooting and Fault Diagnosis: Rapid fault identification and resolution via remote communication, data analysis, or field service visits.
  • On-Site Inspections: Periodic site visits to assess transformer condition, thermal performance, and insulation integrity.
  • Operator Training: Customized training programs for engineering and maintenance teams to ensure safe operation and effective maintenance practices.
  • Spare Parts Supply: Genuine replacement parts available for all transformer components, including bushings, tap changers, cooling elements, and gaskets.
  • Remote Diagnostic Services: Integration support for digital monitoring systems enabling predictive maintenance and real-time performance tracking.
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750KVA Oil Immersed Power Transformer with YNd11 Connection and ONAN Cooling for Industrial Power Distribution

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Product Detail
Rated freaquency :
60Hz
Tapping range :
±2x2.5%
Type :
S-M-750/13.8-0.48
Rated capacity :
750KVA
Rated current :
31.4/902.1 A
MOQ :
1 set
Contact Supplier
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750KVA Oil Immersed Power Transformer with YNd11 Connection and ONAN Cooling for Industrial Power Distribution

Ningbo Tianan (Group) Co.,Ltd.

Verified Supplier
10 Years
zhejiang, ningbo
Since 1969
Business Type :
Manufacturer, Exporter, Trading Company, Seller
Main Products :
Compact Transformer Substation, Mobile Transformer Substation, Cast Resin Dry Type Transformer
Total Annual :
250000000-300000000
Employee Number :
3000~3500
Certification Level :
Verified Supplier
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