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2500kva Three Phase Dry Type Isolation Step Down Transformer Nema3r 480v To 220v

Basic Information
Place of Origin: CHINA
Brand Name: WINLEY
Certification: UL,CE,ISO
Model Number: 2500KVA
Minimum Order Quantity: 1unit
Price: $1000-$150000
Packaging Details: Plywood case
Delivery Time: 30days
Payment Terms: T/T
Supply Ability: 1000set/month
Detail Information
Rated Capacity: 100VA~5000KVA Phase: Three
Enclosures Protection Level: NEMA3R Frequency: 50Hz/60Hz
Insulation Class: F/H Material: Copper
Certificate: UL,CE,ISO Standard: ANSI,IEC
High Light:

2500KVA Dry Type Isolation Transformer


Dry Type Isolation Transformer NEMA3R


ANSI Dry Type Transformer

Product Description

2500KVA Three Phase Dry Type isolation Transformer NEMA3R





1. The energy consumption efficiency of the transformer reaches 99.26%, 8-15 percentage points higher than that of general products.
2. The enclosure meets the requirements of AWS certification (American Electrotechnical Association certification), Its load-bearing, heat dissipation, and rainproof performance meet NEMA3R standards (requirements for outdoor enclosure in North America).

3. HIGH SECURITY - VPI transformer has no combustible resin, halogen-free, non-combustion supporting, and flame retardant in use. It will not explode and release toxic gases, will not cause harm to the environment, other equipment, and the human body, and is insensitive to temperature, dust, and pollution.

4. The operation's partial discharge is small and will never crack. Its safety characteristics are especially suitable for places with high fire protection requirements and high population density.


Main data


Product Name 2500KVA Three Phase Dry Type isolation Transformer NEMA3R
Type Dry type
Winding Material Enameled copper wire or enameled aluminum wire
Capacity 25KVA-2500KVA
Input Voltage Customized
Output Voltage Customized
Frequency 50/60Hz
Connection Type DYN11/YYN0
Insulation Level F/H
Enclosures Protection Level NEMA3R
Pressure-tight Test Primary to secondary2.5KV/min;
Primary to safety ground2.5KV/min;
Secondary to safety ground1.5KV/min
Insulation Resistance Primary to secondary 2500V>100megohm;
Primary to safety ground 2500V>100megohm;
Secondary to safety ground 1500V>100megohm
Ground Resistance 25A<100milliohm
Induction Withstand Voltage Test 125Hz / 800V / 60s
Cooling Method Natural or air cooling
Temperature Rise ≤125K
Transformation Ratio <3%
Air Carrying Current <3%
Impedance Voltage about 4.5%
Total Losses 4%
Efficiency 80%--99%
Operating Temperature -15℃~40℃ (40℃, 90%R.H., 56days)
Storage Temperature -25℃~100℃(40℃, 90%R.H., 56days)
Certificate UL,CE,ISO




Rated capacity High Voltage Low Connection Symbol No-Load Loss On-Load Loss No Load Current Weight Short Circuit Impendence
(KVA) (KV) Voltage (W) (W) (%) (KG) (%)
10 6
0.4 Dyn11
0.15 0.325 4.1 130 4
30 0.215 0.75 3.2 260
50 0.305 1.055 2.8 315
80 0.415 1.46 2.6 470
100 0.45 1.665 2.4 520
125 0.53 1.955 2.2 585
160 0.61 2.25 2.2 670
200 0.7 2.675 2 790
250 0.81 2.915 2 920
315 0.99 3.67 1.8 1085
400 1.1 4.22 1.8 1320
500 1.305 5.165 1.8 1520
630 1.46 6.31 1.6 1820 6
800 1.71 7.36 1.6 2105
1000 1.99 8.6 1.4 2550
1250 2.35 10.26 1.4 2900
1600 2.755 12.42 1.4 3490
2000 3.735 15.3 1.2 4220
2500 4.5 19.53 1.2 4955


Production process


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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.


Contact Details

Phone Number : 86-18650108051

WhatsApp : +8618650108051