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250KVA Dry Type Three Phase Auto Isolation Transformer Step Down

Basic Information
Place of Origin: CHINA
Brand Name: WINLEY
Certification: ISO,CE
Model Number: SG-250KVA
Minimum Order Quantity: 1unit
Price: $500-$100000
Packaging Details: Plywood case
Delivery Time: 30days
Payment Terms: T/T
Supply Ability: 1000set/month
Detail Information
Type: Dry Type Auto Transformer Phase: Three
Insulation Class: F/H Frequency: 50/60Hz
Impedance Voltage: 4% Rated Capacity: 250KVA Or Customized
Rated Voltage: 220V/380V/440V/480V
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3Phase Auto Isolation Transformer


250KVA Auto Isolation Transformer


Dry Three Phase Auto Transformer

Product Description

250KVA Dry Type Three Phase Auto isolation Transformer step down





SG series single - phase and three - phase dry type transformer adopts high quality material and advanced technology , it has advantages of damp - proof and convenient maintenance, it can be applied to such power transmission and distribution places like underground railway , high building, airport, station, wharf, enterprise, tunnel, etc. It is mainly used in power supply occasions of AC 50~60Hz and voltage less than 500V.




1) Electrochemical industry: It's the most industries apply to rectifier transformer, electrolyze non-ferrous metal compounds for aluminum, magnesium, coppr and other metal.
2) Traction with dc power supply: It is used in dc grid of mining or city electric locomotive dc. Due to the valve side joint overhead lines occur the short circuit fault always, dc load amplitude becomes larger and electric locomotive starts frequently, which will cause varying degrees of short time overload. Therefore, temperature rise and current density of rectifier transformer will achieve a lower limit. The impedance is about 30% greater than the corresponding power transformer.
3) Transmission with dc power supply: It is mainly used in dc motor power supply in the electrical drive, such as the armature and excitation of rolling machine.




Application UPS uninterrupted power supply industry
Current Designed according to customer requirements
Short-circuit Impedance Designed according to customer requirements
Operating Voltage < 1KV
Operating Frequency 50/60Hz
Dielectric Strength 3.5KV, no breakdown within 60s
Insulation resistance IOOMΩ Min/DC500V
Insulation Cllass B, F, H
Efficiency ≥98%
Operating Temperature -25-50
Cooling AN/FN
Noise < 65 dB
Design Standards Refer to IEC61558.1/GB6450
Operating Altitude < 4,000m


Production process


250KVA Dry Type Three Phase Auto Isolation Transformer Step Down 0250KVA Dry Type Three Phase Auto Isolation Transformer Step Down 1250KVA Dry Type Three Phase Auto Isolation Transformer Step Down 2




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: Sample time 3-7 days, we usually ship by DHL, UPS, FedEx,etc. Mass production time 7-25 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(MOQ:≥10pcs).

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