電源質量對電動機保護器的影響
閆武林
(天水二一三電器有限公司,甘肅 天水 741001)
摘 要:電源質量下降,會使電子式和智能化的電動機保護器在故障判斷和輸出方面都產生誤判,對比分析了電源質量對雙金屬片式和電子式兩類電動機保護器的影響,對電子式保護器的傳感器、抗干擾濾波、A/D 轉換、熱積累數學模型四個方面引起的誤動作進行了闡述,為電動機保護器的設計和選用提供了參考。
關鍵詞:電源質量;電動機保護器;誤動作
中圖分類號:TM307 文獻標識碼:B 文章編號:1007-3175(2017)05-0055-03
Influence of Power Supply Quality on Motor Protector
YAN Wu-lin
(Tianshui 213 Electrical Apparatus Co., Ltd, Tianshui 741001, China)
Abstract: The power supply quality reduction will make the electronic-type and intelligentized motor protector misjudge the respects of fault and output. This paper carried out contrastive analysis of the power supply quality impacts on bimetal elements steam trap and electronic type motor protectors, and expounded the misoperation caused by the sensor of electronic protector, anti-jamming filtering, A/D conversion, heat accumulation mathematical model four aspects, which provides references for the design and selection of motor protector.
Key words: power supply quality; motor protector; misoperation
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