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Circuit Breakers: Definition and Operating Principles

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Circuit Breakers: Definition and Operating Principles

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Questions and Answers

What is the main function of a circuit breaker?

Automatically break a circuit under fault conditions (correct)

Make or break a circuit manually or by remote control under normal conditions

Produce enormous heat under fault conditions

Create an arc under normal operating conditions

What happens to the contacts of a circuit breaker under fault conditions?

They cool the arc to extinguish it

They are separated, creating an arc between them (correct)

They remain closed and do not open automatically

They lengthen to increase arc resistance

What is the main problem in a circuit breaker during fault conditions?

Delayed current interruption due to the production of an arc

High resistance method of arc extinction

Cross-section of the arc decreasing

Generation of enormous heat causing damage to the system and the circuit breaker itself (correct)

What factor increases the arc resistance of a circuit breaker?

Decrease in the number of particles between the contacts Signup and view all the answers

Which method of arc extinction involves lengthening the arc?

High Resistance Method Signup and view all the answers

What does the lengthening of the arc achieve in arc extinction?

Increase in arc resistance to extinguish it Signup and view all the answers

ماذا يحدث للجهات الاتصالية في كسر الدائرة تحت ظروف العطل؟

تتوسع Signup and view all the answers

ما هو الآثار الرئيسية لزيادة مقاومة القوس في كسر الدائرة؟

تقليل عدد الجزيئات بين الاتصالات Signup and view all the answers

ما هي وظيفة الحدود المشتركة في حلول كاملة لكسر الدائرة؟

حساب الحل المعين Signup and view all the answers

أي من الطرق التالية من طرق انقطاع التيار في كسر دائرة التيار المتردد يعتمد على تأثير الانفجار؟

طريق المقاومة المنخفضة Signup and view all the answers

ما هي وظيفة القاطع الكهربائي أساسًا؟

فصل الدائرة تحت ظروف العطل تلقائيًا Signup and view all the answers

ماذا يحدث لجهات اتصال القاطع الكهربائي تحت ظروف العطل؟

تنفصل وتولد قوس كهربائي Signup and view all the answers

ما هو التأثير الذي يحدثه تطويل القوس في إطفاء القوس؟

زيادة المقاومة وتبخير المواد Signup and view all the answers

ما هو الشيء الرئيسي الذي يجب أن يحدث في قاطع الدائرة في أقصر وقت ممكن؟

إطفاء القوس بأسرع وقت ممكن Signup and view all the answers