Electrical Equipment & Supplies Industrial Controls Transformers

250KVA Dry Type Three Phase Auto Isolation Transformer Step Down - 98% Efficiency, <65dB Noise, Operating Voltage <1KV

Name: 250KVA Dry Type Three Phase Auto Isolation Transformer Step Down - 98% Efficiency, <65dB Noise, Operating Voltage <1KV
Brand: Xiamen Winley Electric Co.,Ltd

Industrial-grade 250KVA dry type three-phase auto isolation transformer with step-down capability. Features ≥98% efficiency, <65dB noise level, and operating voltage under 1KV. Certified to IEC61558.1/GB6450 standards, suitable for electrochemical, traction, and DC power applications. Includes 24-month warranty and custom OEM/ODM options.

Rated Capacity 250KVA Or Customized

Place of Origin CHINA

Phase Three

Packaging Details Plywood case

Insulation Class F/H

Model Number SG-250KVA

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Product Description

Product Overview

The SG series 250KVA dry type three-phase auto isolation transformer is engineered for step-down voltage applications in demanding industrial environments. Constructed with premium materials and advanced manufacturing techniques, this transformer offers exceptional damp-proof performance and simplified maintenance capabilities.

Key Applications

Electrochemical Industry: Ideal for rectifier transformer applications in aluminum, magnesium, copper, and other non-ferrous metal electrolysis processes
DC Power Traction: Suitable for mining and urban electric locomotive DC grids, designed to handle frequent starts and short-time overload conditions
DC Power Transmission: Provides reliable power supply for DC motors in electrical drive systems, including rolling machine armature and excitation applications
Infrastructure Projects: Perfect for underground railways, high-rise buildings, airports, stations, wharves, industrial enterprises, and tunnel installations

Technical Specifications

Parameter	Specification
Application	UPS Uninterrupted Power Supply Industry
Operating Voltage	< 1KV
Operating Frequency	50/60Hz
Dielectric Strength	3.5KV, no breakdown within 60s
Insulation Resistance	100MΩ Minimum / DC500V
Insulation Class	B, F, H
Efficiency	≥98%
Operating Temperature	-25℃ to +50℃
Cooling System	AN/FN
Noise Level	< 65 dB
Operating Altitude	< 4,000 meters
Design Standards	IEC61558.1 / GB6450

Manufacturing Process

Three-phase auto isolation transformer assembly and quality control

Industrial transformer testing and certification process

Frequently Asked Questions

Can I place a sample order?

Yes, we welcome sample orders for quality testing and verification. Sample delivery typically takes 3-7 days via DHL, UPS, or FedEx.

What is the production lead time?

Mass production requires 7-25 days, depending on order quantity and customization requirements.

How long is the warranty period?

We provide a 24-month warranty from the bill of lading date, including technical support and replacement of damaged components.

Are OEM and ODM services available?

Yes, we offer comprehensive customization including colors, special functions, packaging, and logo printing (minimum order quantity: 10 pieces).

How do you ensure product quality?

All products hold CE certification and undergo rigorous testing throughout production. Our technical team supervises each manufacturing process to ensure compliance with specifications.