With the prevention of insulation aging as the key, service life management for transformers includes transformer fault forecast, on the spot fault diagnosis, trend analysis and state examination.
变压器的预警系统、现场诊断、趋势分析、状态检修是寿命管理的内容，防止变压器绝缘老化是关键。
2
Radiographic examination was performed with portable X-ray fault detector appling the special radiographic technique for fillet weld of heat exchange tube-tubeplate.