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Idan Dauda da Nokowa na Tashin Kasa a Maimakon Intsirin Yawa

Idan tashin kasa (CB) yana buɗe ko kuma yana ɗaukar shunt reactor banks ko unloaded power transformers, ya fiye yake yana ɗauka intsirin yawa masu mai yawa, kafin yawanci goma sha'awa, tare da lagga 90 darajin da ba wata shi. Amma, waɗannan intsira suna zama suka faɗa zuwa zero ta hanyar al'amuran da ake magana a cikin current chopping. Wannan zai iya haɗa da chopping overvoltages da kuma reignition overvoltages na gaba, wanda ke zama na muhimmanci daga abubuwan da ke faruwa idan CB ya yi daidai da kyau da kuma abubuwan da ake faru a cikin maimakon.

Al'amuran Current Chopping

Murabba'a na yanayin voltage da current a lokacin current chopping an bayyana a kan takarda ta hagu a nan don intsirin yawa masu mai yawa. Idan current chopping yana faru, yana ƙunshi high-frequency current oscillation wanda yake zama da fuskantar sudden current zero. Wannan al'amuran shine saboda arc instability wanda yake faru saboda arc characteristics da abubuwan da ake faru a cikin maimakon.

• Arc Instability: Arc characteristic da abubuwan da ake faru a cikin maimakon sun haifar da instability, wanda yake zama da intsira ta sauya a matsayin da ya ci gaba saboda hanyar natural zero crossing.

• High-Frequency Oscillation: Idan current chopping yana faru, high-frequency oscillations ke faru, wanda ke taimaka waɗannan intsira ta sauya a matsayin da ya ci gaba.

Al'amuran Reignition

Wani al'amuran na biyu a kan intsirin yawa masu mai yawa shine reignition. Circuit breakers suna iya ɗauka intsirin yawa masu mai yawa, kifas da arcing times masu yawan lokaci da contact gaps masu yawan tsakiyar. Amma, dielectric withstand strength na CB yana zama da damuwa tare da contact gap. Saboda haka, contact gap masu yawan tsakiyar yana da damuwar da shi ya kasance da voltage breakdown a lokacin transient recovery voltage (TRV) idan TRV yana kawo da dielectric withstand across the contact gap.

• Dielectric Withstand Strength: Dielectric strength na CB yana zama da damuwa tare da contact gap.

• Voltage Breakdown Risk: Contact gap masu yawan tsakiyar yana da damuwar da shi ya kasance da voltage breakdown a lokacin TRV idan TRV yana kawo da dielectric withstand capability na CB.

Muhimmiyar Bayanai

Gaskiya, idan tashin kasa yana ɗauka intsirin yawa masu mai yawa:

• Current Chopping: Suya ɗaukan intsira zai iya haɗa da high-frequency oscillations da kuma overvoltages.

• Reignition: Ba a lokacin ɗaukarsa, akwai damuwar da reignition za a faru saboda contact gap masu yawan tsakiyar, wanda ke zama da overvoltages na gaba.

Waɗannan al'amuran suna iya haɗa da muhimmanci ga maimakon, bincike da kyau da tashin kasa ya yi daidai da kuma abubuwan da ake faru a cikin maimakon. Fahimta da kuma inganta waɗannan abubuwa suna da muhimmanci ga amfani da maimakon electrili da kyau.