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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?

    <p>Decrease in the number of particles between the contacts</p> Signup and view all the answers

    Which method of arc extinction involves lengthening the arc?

    <p>High Resistance Method</p> Signup and view all the answers

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

    <p>Increase in arc resistance to extinguish it</p> Signup and view all the answers

    ماذا يحدث للجهات الاتصالية في كسر الدائرة تحت ظروف العطل؟

    <p>تتوسع</p> Signup and view all the answers

    ما هو الآثار الرئيسية لزيادة مقاومة القوس في كسر الدائرة؟

    <p>تقليل عدد الجزيئات بين الاتصالات</p> Signup and view all the answers

    ما هي وظيفة الحدود المشتركة في حلول كاملة لكسر الدائرة؟

    <p>حساب الحل المعين</p> Signup and view all the answers

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

    <p>طريق المقاومة المنخفضة</p> Signup and view all the answers

    ما هي وظيفة القاطع الكهربائي أساسًا؟

    <p>فصل الدائرة تحت ظروف العطل تلقائيًا</p> Signup and view all the answers

    ماذا يحدث لجهات اتصال القاطع الكهربائي تحت ظروف العطل؟

    <p>تنفصل وتولد قوس كهربائي</p> Signup and view all the answers

    ما هو التأثير الذي يحدثه تطويل القوس في إطفاء القوس؟

    <p>زيادة المقاومة وتبخير المواد</p> Signup and view all the answers

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

    <p>إطفاء القوس بأسرع وقت ممكن</p> Signup and view all the answers

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