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Recent questions tagged breaker

1 answer 86 views

State function of starter and ELCB. (Earth Leakage Circuit Breaker)

asked Sep 18, 2018 in Industry Electrical Systems-I by Shimroz123
1 answer 21 views

The arc temperature in Oil Circuit Breaker may reach up to_______.  (A) 5,000° K (B) 8,000° K (C) 10,000° K (D) None of the above

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 73 views

The number of cycles in which a high speed circuit breaker can complete its operation is  (A) 3 to 8 (B) 10 to 18 (C) 20 to 30 (D) 40 to 50

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 26 views

A circuit breaker is designed to protect an electrical circuit from damage caused by :  (A) Over load (B) Short circuit (C) Over current (D) All of the above

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 34 views

The Minimum Oil Circuit Breaker (MOCB) is named because of :  (A) Reduced requirement of oil (B) Reduced requirement of air (C) All of the above (D) None of the above

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 32 views

Breaking capacity of a circuit breaker is usually expressed in terms of  (1) Ampere (2) Volts (3) MW (4) MVA

asked Apr 30, 2018 in Electrical Engineering by Shimroz123
1 answer 26 views

For selecting a circuit breaker, ______ should be determined.  (A) initial current that flows on occurrence of a short circuit only (B) transient current that flows at the time of circuit interruption only (C) resonant frequency only (D) (A) and (B) 

asked Apr 30, 2018 in Switchgear And Protection by Shimroz123
1 answer 14 views

The arc voltage in a circuit breaker is :

asked Apr 29, 2018 in Utilization of electrical energy by Shimroz123
1 answer 28 views

Which of the following is used in a circuit breaker as the medium in which the arc forms? A) Insulating gas B) Insulating oil C) Vacuum D) All the above

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 22 views

ln a minimum oil circuit breaker the oil is used

asked Apr 26, 2018 in Switchgear And Protection by Shimroz123
1 answer 25 views

what is SF6 circuit breaker?

asked Dec 4, 2017 in Switchgear And Protection by Quiz
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