How zct can Save You Time, Stress, and Money.
How zct can Save You Time, Stress, and Money.
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Also, it is advisable to note the protect grounding is properly routed. There exists a photograph within the SR-750 guide that demonstrates this. Failure to properly route the shield grounding will disable ground detection. outdated field man
この地絡電流が流れ続けているところで、零相変流器へ流れる電流をご覧下さい。零相変流器のところを流れる電流のバランスがくずれています。これによって零相変流器２次側には電流が流れるということです。
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Inside the sizing of protection transformers, the resistance (burden) of the connection sales opportunities can have a considerable influence. In calculations, the resistance of your link qualified prospects could be believed from:
零相変流器の２次側に保護継電器を設置しておき、電流が流れたら遮断器を開放するようにしておけば地絡事故発生した場合に迅速に故障箇所を電気回路から切り離すことができます。これが零相変流器の設置目的と使用法です。
These zero-phase molded current transformers shield the ability process versus leakage and earth faults. Every of these present transformers has an insulation degree of 0.72 kV and needs a suitably insulated Principal conductor.
Latest transformers are built to change significant Key currents into workable secondary currents by way of a specified transformation ratio. By way of example, a CT that has a four hundred/5 ratio can rework an true existing of 400A down to 5A.
ご覧のとおり、決定的な違いは変流器に通す主回路の電線です。通常の変流器であれば１つの変流器に１相分の電線を通し１相分の電流を変流器２次側へ取り出します。
何らかの原因で３相の電流のバランスが乱れると、コイルに二次電流が瞬間的に流れ、地絡として検出されます。
・毎年数億円を超える設備投資案件の設計から施工管理、設備の立上げまでを担当
(two) The relay complies with here CE marking variety MITSUBISHI MCCB using a voltage tripping gadget to interrupt present-day through ground fault.
Frequency response: ZCT is designed to function above an array of frequencies, generally from 50Hz to 400Hz, that makes them well suited for use in a variety of programs.
If the leakage present-day in the CT Most important reaches a particular stage, the CT secondary supplies the necessary existing signal or voltage sign – based on the sort of protective relay in use – for your protection of the ability procedure. EZ Series
受電設備の母線で１線地絡事故が発生した例を示します。地絡ということは、大地に電流が流れたということを指します。大地に流れた”地絡電流”は地絡した相以外の相の電線の対地静電容量を通って電流が流れます。