Not known Factual Statements About zct
Not known Factual Statements About zct
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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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Compared with popular transformers, which might be largely used to evaluate phase currents, HY ZCT deal with capturing zero sequence currents. This zero sequence part signifies an unbalance or fault condition from the program.
These zero-period molded latest transformers guard the facility technique in opposition to leakage and earth faults. Each and every of those recent transformers has an insulation standard of 0.72 kV and requires a suitably insulated Key conductor.
Don't have entry to the guide now but I'm pretty absolutely sure that the 750 also internally calculates the residual (imbalance) in the period currents(most microprocessor relays try this). I think the manual will phone the calculated residual fifty/51N versus fifty/51G. Or a little something like that. Alan
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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。
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三相のいずれかに地絡電流が流れると、三相のバランスが崩れて零相電流はゼロとなりません。これにより地絡事故をただちに発見することができます。
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The 750 also means that you can setups fifty/51N aspects utilizing a derived worth in the a few period inputs. These are generally put in place as "Neutral Recent" inside the setpoints.
Also, The volume of secondary zct turns of CT will not be expected based on the rated present of the cable because no secondary present-day flows in usual working circumstances as the a few stage system currents are well balanced.