There was no damage found inside, but there was a little of metal powder in the arc chamber and porcelain bushing and some of the powder has been burned.
阐述了返厂解体检查的情况，内部未发现损伤，但灭弧室和瓷套内有微量金属粉末，部分有灼痕。
Arc discharges accompany with ultraviolet (UV) radiation. By detecting the radiation intensity of arc discharge the damage degree of arc to electrical equipments can be predicted.
电弧放电伴随着紫外光辐射，通过探测放电辐射强度可预测其对用电设备的危害程度。
Probe senses the arc automatically, and LCD screen turns black quickly, It is safe, reliable, and won't damage your eyes.
探头自动感应弧光，液晶光屏迅速变黑，安全、可靠，不会对对眼睛造成伤害。
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