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34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards
Detail Information
Place of Origin:
CHINA
Certification:
CE,ISO
Type:
Substation Transformer
Phase:
Three Phase
Capacity:
1000KVA
Primary Voltage:
7200Y/4160V
Secondary Voltage:
480V
Vector Group:
YNd11
Cooling Class:
ONAN; Self-Cooled
Winding Material:
Aluminum/Copper
Delivery Time:
30days
Supply Ability:
500set/month
Product Description

34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 



This 34 MVA three-phase substation transformer is engineered for modern power infrastructure where high-capacity, corrosion resistance, and reliable delivery timelines are critical. Designed with a 11000V delta primary and 11000Y/6351 grounded wye secondary, it provides stable step-down performance for utility and industrial systems.


Driven by increasing demand from grid expansion, renewable energy integration, and industrial electrification, utilities and EPC contractors are seeking transformers that combine high load capability, environmental durability, and compliance with North American standards. This unit addresses those needs with fan-assisted capacity up to 34 MVA, ANSI/IEEE compliance, and a full 304 stainless steel NEMA 4X enclosure, making it ideal for harsh outdoor environments, coastal regions, and critical infrastructure projects.


34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 0


34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 1


34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 2


34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 3        34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 4


34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 5        34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 6


Main data


Transformer Type  Substation Power Transformer, Conservator Type
Phase  Three Phase
Capacity (w/o Fans)  26 MVA (26000 KVA)
Capacity (w/ Fans)  34 MVA (34000 KVA)
Vector Group  Dyn1
Primary Voltage  11000V
Primary Phasor  Delta
Primary BIL  95 KV
Secondary Voltage  11000Y/6351 
Secondary BIL  95 KV
Frequency  50 Hz
Temperature Rise  55/65°C
Cooling Class  KNAN/KNAF; Self-Cooled/Fan-Cooled
Impedance (Typical)  5.75%, In Accordance with IEEE C57.12.10
Efficiency Standard(s)  Meets ANSI/IEEE Standards
Winding Material  Copper
Tank Material 304 Stainless Steel, Undercoated with a heavy rubberized protective sealing material (0.8 mm thick)
Dimensions* 196W x 149D x 169H
Dry Weight (w/o Oil)*  72648 LBS
Total Weight (Liquid Filled)* 96620 LBS
Off-Load Loss (in watts)  21800W
On-Load Loss (in watts)  120890W


Drawing


34MVA Electrical Substation Transformer 11KV Isolation Transformer 304 SS NEMA 4X Tank ANSI IEEE Standards 7


Standard Features

High-Capacity Performance – 34 MVA with Forced Air Cooling
Supports continuous operation under heavy load conditions, with KNAN/KNAF cooling enabling flexible response to peak demand and system expansion.


304 Stainless Steel Construction – Built for Harsh Environments
Full 304 stainless steel tank, cabinet, and base with heavy-duty anti-corrosion coating:

  1. Superior resistance to corrosion, humidity, salt spray, and industrial pollution
  2. Ideal for coastal, chemical, and outdoor substation environments
  3. Significantly reduces maintenance costs and lifecycle replacement risk
  4. Ensures long-term asset reliability for utility-grade applications

NEMA 4X Enclosure – Maximum Outdoor Protection
Weatherproof, dust-tight, and corrosion-resistant design, suitable for exposed outdoor installations and extreme climates.

Eco-Friendly Natural Ester Insulation Fluid

Biodegradable, non-PCB fluid with high fire point
Improved fire safety and environmental compliance
Preferred for urban, industrial, and renewable energy projects


Advanced Monitoring & Protection System
Equipped with full protection and monitoring devices:

Liquid level, temperature, and pressure indicators with remote alarm contacts
Buchholz relay for internal fault detection
Pressure relief valve and auxiliary control panel
Ensures real-time condition monitoring and operational safety


Applications

  • Utility distribution and substation upgrades
  • Renewable energy interconnection (solar / wind)
  • Industrial plants and heavy manufacturing
  • Data centers and commercial power systems
  • Grid expansion and electrification projects


PRODUCT SPECIFICATION


Substation Transformer Specification
kVA HV LV Width(mm) Length(mm) Height(mm)
315kVA 11000V 400V 800 696 1336
500kVA 27600V 480GrdY/277V 1730 2300 1510
500kVA 11000V 415V 1700 1700 1650
750kVA 11000V 433V 1850 1845 1465
1000kVA 14400V 415/240V 1085 1860 1570
1200kVA 13800V 240V 2450 1850 1820
1500kVA 24940V 600V 1800 1880 1895
2000kVA 7200V 600GrdY/346 1766 2680 1982
2000kVA 44000V 600V 1260 2090 1700
2500kVA 24940V 480GrdY/277V 2400 2200 2060
3000kVA 11000V 415V 1600 2330 1920
3000kVA 22800V 415/240V 2130 3500 1910
3750kVA 44000V 600V 2240 2650 2700
4000kVA 33kV 600Y/347 2150 3250 2290
5000kVA 34500V 7200V 3780 1850 3450
5000kVA 34500V 4160V 2799 2400 2938
6300kVA 35000V 400V 3520 2820 3470
6800kVA 34500V 800V 3400 2670 3400
7500kVA 27600Y 4160V 3350 3290 2270


Ratings

  • Meets/Exceeds CSA Efficiency Ratings
  • Complies with ANSI / IEEE C57.12.131
  • Complies with ANSI / IEEE C57.12.00
  • Complies with ANSI / IEEE C57 12.28
  • Complies with ANSI / IEEE C57 12.29
  • Complies with ANSI / IEEE C57 12.34
  • Complies with ANSI / IEEE C57 12.35
  • Complies with ANSI / IEEE C57.12.70
  • Complies with ANSI / IEEE C57.12.110
  • Complies with ANSI / IEEE C37.47
  • Complies with ANSI / IEEE C62.11
  • Complies with ANSI / IEEE C62.22
  • Complies with ANSI / IEEE 386
  • Complies with ANSI / IEEE C2
  • Complies with ANSI Z535.4
  • Complies with ASTM D6871
  • Complies with ASTM D3487
  • Complies with 10 CFR Part 431
  • Complies with NEMA 260-1996
  • Complies with CSA C802-3
  • Complies with CSA C2.1-06
  • Complies with CSA C50
  • Complies with CSA C88
  • Complies with CSA C88.1
  • Complies with CSA C88-16
  • Complies with CSA C227.4 & C227.5
  • Complies with CSA C802.1


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FAQ


1. Q: Can I have a sample order?

A: Yes, we welcome sample order to test and check quality.

2. Q: What is the lead time?

A: Mass production time 15-25 days.

3. Q: How long is the warranty?

A: 24 monthes from B/L. If there are any accessory problems,just provide the photos of damaged accessory,then we will provide free service. According to the number of products,we will provide easily damaged accessories for free. we also can provide technical support if you need.

4. Q: Is OEM/ODM available?

A: Yes,it is! We are manufacturer with our own R&D team, we can customize products according to customer's drawing or requirements.

Customized services:

a. Customized color and special function.

b. Customized box.

c. Print customer's logo.

d. Your other ideas about product, we can help you design and put them into production. The above customized services must be confirmed before production.

5. Q: How to control the products quality?

A: Our company owns the core technology ,all kinds of products hold CE certificate. We have professional engineers. Workers are strictly required to make products according to the drawings. Each process has technical instructors.The QC supervisors will regularly inspect the production. We will do products performance tests during production, and comprehensive quality tests when the products is completed.