Karamin Kirkiya na Zafi

A cikin karamin karamin jirgin karamin hawa, an faru da ya zama da ya rasa a hawa mai yawa idan an faru. Ana amfani da wannan karamin jirgi don karamin hanyar tsohon volts, umma a kan 15 kV, tare da abubuwan da ake gina 500 MVA. Don jirgin karamin hawa, akwai muhimmanci masu yadda ake da shi saboda taili, ciki har da:

• Kawo karfi da ingantaccen aiki da ake da shi saboda amfani da taili.

• Babu tasiri na yara da ake yi saboda gasar da tailin da suka yi har zuwa.

• Kawo karfi da adadin da ake yi saboda takardun taili daga wata zuwa wata ba saboda aiki da shi.

A cikin karamin jirgin hawa, kadan da kadan da karamin hawa sun faru a hawa a kan yanayi, ta amfani da siffar tsohon resistance. Karamin hawa yana kusa da karamin hawa da karamin hawa, inda karamin hawa yana zama da tsarki saboda kudan, kyanwa da kusa da karamin hawa.

Yana zama da tsarki har zuwa lokacin da ciyar da ake yi a kan karamin hawa yana fi kawo waɗannan voltance na sistem, kuma karamin hawa yana rasa a baya da lokacin da AC wave yake faru.

Ana amfani da karamin jirgin hawa a cikin karamin DC da karamin AC tare da 12,000 V. Wadannan babban irin na da take da zaɓe, ana fito su a kan panelon da suke da shi ko a kan switchgear da ake yi a kan zamani, a kan karamin medium- da low-voltage switchgear na AC systems.

Plain Break Type Air Break Circuit Breaker

Irin mafi girma ta da biyu na contact da suke da sauran. Karamin hawa yana faru a kan karamin hawa da suke da sauran, kuma yana kusa da karamin hawa saboda kudan da hawa da karamin hawa da karamin hawa. Idan an faru biyu da biyu, karamin hawa yana kusa da karamin hawa, tare da kusa da karamin hawa.

Yadda wannan yana faru da karamin hawa yana iya haɗa zuwa wuraren metal da ke sauransu yana kawo karfi da shi saboda karamin hawa, kuma yana iya amfani da shi a kan karamin 500 V da karamin tafkin da ke sauransu.

Magnetic Blow-Out Type Air Break Circuit Breaker

Ana amfani da shi a cikin karamin da suke da volts tare da 11 kV, inda karamin hawa yana rasa saboda magnetic field da ake yi a kan blowout coils da ake fito su a kan karamin da ake faru. Wannan coils sun kusa da karamin hawa zuwa chutes, ba sun rasa karamin hawa ba. A cikin chutes, karamin hawa yana kusa da karamin hawa, kyanwa da kusa da karamin hawa. Arc shields sun kawo karfi da karamin hawa haɗa zuwa wuraren sauransu.

Polarity, Arc Chutes, and Operational Details of Air Break Circuit Breakers
Importance of Coil Polarity

Tattaunawa da polarity na coil yana da muhimmanci don kusa da karamin hawa zuwa fuskantar, tare da electromagnetic forces don kusa da karamin hawa. Wannan yadda yake da muhimmanci da karamin hawa, wanda yake da muhimmanci don karamin jirgin hawa su iya samun rupturing capacities masu yawan.

Arc Chute Functionality

Arc chute yana da muhimmanci a cikin karamin jirgin hawa, tare da uku abubuwa da suke da sauran:

• Arc Confinement: Yana kawo karfi da karamin hawa zuwa wurar da aka tabbatar, kawo karfi da karamin hawa haɗa zuwa wuraren sauransu.

• Magnetic Control: Yana kusa da karamin hawa zuwa chutes tare da magnetic fields don kusa da karamin hawa a cikin chutes.

• Rapid Cooling: Yana kyanwa da arc gases tare da kyanwa da karamin hawa, tare da karamin hawa.

Air Chute Air Break Circuit Breaker Design

Don karamin tsohon da karamin medium-voltage, wannan breaker yana da:

• Dual Contact Sets:

• Main Contacts: Copper-based, silver-plated don karamin resistance, yana da current a cikin karamin da suke da sauran.

• Arcing (Auxiliary) Contacts: Heat-resistant copper alloy, designed to withstand arcing during fault interruption. They close before and open after the main contacts to protect the main contacts from damage.

• Blowout Mechanism: Steel inserts in the arcing chutes create magnetic fields that accelerate upward arc movement. These plates split the arc into series of short arcs, increasing total voltage drop (anode + cathode drops) across the arcs. If this sum exceeds the system voltage, the arc extinguishes rapidly.

• Cooling Action: Arc contact with cool steel plates rapidly cools and deionizes the arc, aided by natural or magnetic blowout forces.

Working Principle

• Fault Occurrence: Main contacts separate first, shifting current to the arcing contacts.

• Arc Formation: As arcing contacts separate, an arc draws between them.

• Arc Movement: Electromagnetic and thermal forces drive the arc upward along arc runners.

• Arc Splitting & Extinction: The arc is split by splitter plates, lengthened, cooled, and deionized, leading to extinction.

Applications

• Power Station Auxiliaries & Industrial Plants: Suitable for environments requiring fire/explosion hazard mitigation.

• DC Systems: Employ arc lengthening, runners, and magnetic blowout for breakers up to 15 kV.

Limitation

• Low-Current Inefficiency: Arc chutes are less effective at low currents due to weaker electromagnetic fields, causing slower arc movement into the chute and potentially delayed interruption.

This design balances simplicity and reliability for medium/low-voltage applications, though its performance varies with current magnitude.