Oil-immersed transformer

Overview

Oil-immersed transformer is a kind of power transformer that uses insulating oil as cooling and insulating medium, and effectively dissipates heat through oil circulation, which is suitable for medium and high voltage and large capacity transmission and distribution scenarios. Its core features include high reliability, long life and the ability to adapt to harsh environments, and it is widely used in power systems, industrial facilities and new energy fields.

Key Features

• Equipped with forced oil circulation cooling (OFAF) and high-temperature-resistant insulation, supporting 150% rated load for 2 hours with winding hot-spot temperature below 98℃ (IEEE C57.91 compliant).
• Vacuum oil-impregnation and multi-layer shielding limit partial discharge to 5pC (1/3 of industry average 15pC), with proven 400,000-hour lifespan (accelerated aging tested).
• Segmented insulation cylinder and surge counter pass 250kV/μs lightning impulse test (IEC 60076-3), exceeding standard 200kV capability.

4、ow-temperature oil formulation and hermetic tank enable cold-start at -40℃ without preheating, with oil temperature rise ≤45K under high load (IEC 60354).

Picture

油浸式变压器

一、概述

油浸式变压器是一种利用绝缘油作为冷却和绝缘介质的电力变压器，通过油循环有效散热，适用于中高压、大容量的输配电场景。其核心特点包括高可靠性、长寿命和适应恶劣环境的能力，广泛应用于电力系统、工业设施及新能源领域。

二、关键特性

1、采用强制油循环冷却系统（OFAF）和耐高温绝缘材料，允许150%额定负载运行2小时，绕组热点温度控制在98℃以下（IEEE C57.91标准）。

2、真空注油工艺和多重屏蔽结构，局部放电量仅为行业平均值的1/3（行业均值15pC），设计寿命达40万小时（加速老化试验验证）。

3、采用分段式绝缘筒和雷击计数器，通过250kV/μs雷电冲击测试（IEC 60076-3标准），高于常规产品的200kV耐受水平。

4、低温启动油配方和全密封油箱设计，在北极圈级低温（-40℃）下无需预热，高温工况下油温升≤45K（IEC 60354负载导则）。