250kva Cast Coil Transformer Dry Type 400v Cast Resin Electrical Distribution Transformers
Product overview
WINLEY cast coil 250 kVA cast resin dry‑type transformers are designed, built, and factory‑tested to meet the highest industry standards — including UL, cUL, CSA and IEEE — and provide reliable indoor electrical distribution where safety, low maintenance and environmental compliance are priorities, making them ideal for commercial buildings, data centers, hospitals and light industrial applications.
Product Photos
Main data
| 250kVA transformer specification data |
| No. | Particulars | Unit | Specification |
| 1 | Type | ~ | cast resin, dry type |
| 2 | Rated capacity | kVA | 250 |
| 3 | No. of Phase | ~ | 3 |
| 4 | Primary voltage | V | 400 |
| 5 | Secondary voltage | V | 400Y/230 |
| 6 | Tapping type | ~ | off-circuit |
| 7 | Tapping type | % | ±2*2.5% |
| 8 | Cooling method | ~ | AN |
| 9 | Rated frequency | Hz | 50 |
| 10 | Vector group | ~ | Dyn11 |
| 11 | Insulation class | ~ | F (155℃) |
| 12 | Temperature rise | K | 100 |
| 13 | Winding material | ~ | copper |
| 14 | Core material | ~ | silicon steel |
| 15 | Enclosure | ~ | IP00 |
| 16 | Service condition | ~ | indoor |
| 17 | Sea level | M | ≤1000 |
| 18 | Standard | ~ | IEC60076 |
Features & benefits
- Safety and fire resistance: Cast‑resin insulation eliminates combustible transformer oil, reducing fire risk and making the unit safer for indoor and densely occupied spaces.
- Low maintenance: Dry construction minimizes routine maintenance and removes oil leak concerns.
- High reliability: Copper windings and silicon steel core ensure efficient performance and long service life.
- Thermal performance: F‑class insulation and 100 K temperature rise rating for robust thermal endurance in demanding environments.
- Flexibility: Off‑circuit tap changer provides precise voltage adjustment for site conditions and load variations.
- Standards compliant: Designed and manufactured to IEC 60076 for global compatibility and quality assurance.
- Quiet operation: Dry‑type construction and AN cooling reduce noise compared with oil‑filled units, ideal for noise‑sensitive locations.
Technical drawings
Production process
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.
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