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-- LO-FX
+ Center through ct
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-- LO-DM0001
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-- LO-DM0003
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+ Electricity meter ct
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-- LO-56XXC
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-- LO-GP0012
+ High frequency current transformer
-- LO-HF4001
-- LO-HF4002
-- LO-1862-008 D
+ High frequency switching transformer
-- LO-B8121-041
-- LO-B8121-028
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-- LO-10682-003
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-- LO-W0109-014
+ Liou picture
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-- LO-PLT8088-019
-- LO-PLT8088-020
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-- LO-PLT8088-008
+ Split core ct
-- SP-LO-T50
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-- SP-LO-T24
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-- Split core ct demon
+ Three phase current transformer
-- LO-TP0001
-- LO-TP0002
-- LO-TP0003
-- LO-TP0004
+ Residual(zero sequence)current transformer
-- Zero sequence current transformer
-- LO-ZCT513502
-- Zero sequence current transformer 53 Series
-- LO-ZCT513802
-- LO-ZCT513902
-- LO-ZCT513002
-- LO-ZCT513102
-- LO-ZCT513202
-- LO-ZCT513602
-- LO-ZCT513402
-- LO-ZCT513002-1
-- LO-ZCT513902-1
-- LO-ZCT513802-1
-- LO-ZCT513602-1
-- LO-ZCT513702-1
-- Residual current transformer 51series
-- LO-ZCT513302
-- LO-CTYD
-- LO-CT11-R
-- LO-CTK
-- LO-CTK-N
-- LO-CTK-R
-- LO-CTK-Y
-- LO-CTK-YF
-- LO-ZCT513702
-- LO-CTY1
-- LO-CT11
-- LO-CTYF
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-- LO-FK
-- LO-SEN-F
-- LO-SEN-Y
-- LO-YK
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如何來(lái)鑒別電流互感器有沒(méi)有出現(xiàn)異常損壞?
Publisher:admin  Time:2013/9/28 16:49:18  Click:5170
小編教大家一招來(lái)鑒定判別電流互感器是否存在損壞的好方法,我們可以利用伏安的特性原理,因?yàn)殡娏骰ジ衅鞯蔫F心是處在逐漸飽和的狀態(tài)下的,如果在短路的電流下,那么電流互感器的鐵心就會(huì)慢慢趨向于飽和,假如勵(lì)磁電流以超快的速度上升的話,那么在電流中的勵(lì)磁電流占的比例就會(huì)加大很多,就會(huì)造成比差逐漸變成負(fù)值且會(huì)不斷加大負(fù)值。因?yàn)槔^電器的動(dòng)作電流是高出額定電流好多倍的,所以電流互感器在這樣的短路電流下要確保繼電器是能夠正常穩(wěn)定地運(yùn)作。
怎么樣才能達(dá)到上述中提出的要求呢,那么就要在使用電流互感器之前先采用伏安特性作出10%的誤差曲線,在測(cè)量伏安特性曲線的時(shí)候還可以同時(shí)進(jìn)行二次線圈的檢查,主要檢查它有沒(méi)有出現(xiàn)匝間短路。
(圖/文http://m.routemybrain.com)
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