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A type of circuit breaker which can work up to 15 kV and the rupturing capacity of that circuit breaker is 2500 MVA. Determine the type of circuit breaker mentioned in the context and shown in the given figure.
It is a circuit breaker in which the heat generated by the high current in the medium between the contacts is sufficient to ionize the medium. Which medium is used in the circuit breaker?
Consider the following statements: 1. The voltage developed across the OFF switches of the half-bridge converter is the maximum dc-link voltage. 2. In the full-bridge converter, the voltage across the primary of the transformer is the dc link voltage. 3. The voltage developed across the OFF switches of the full-bridge converter is half the maximum dc-link voltage. Which of the above statements are correct?
Which of the following appears across the circuit breaker contacts immediately after the arc interruption at current zero?
In a voltage regulating system a rotating arm moves, depending upon the terminal voltage, across a set of contacts, short circuiting some part or more of the resistance inserted in the exciter field circuit. What type of voltage regulator is this?
What are the steps required in sequence to solve a circuit using superposition theorem? (a) Select any one source and short circuit all other voltage sources. (b) Find out the current or voltage across the required element, due to the source under consideration. (c) Open all current sources, if the internal impedance is not known. If known replace them by their impedances. (d) Add all the individual effects produced by individual sources to obtain the total current in or across the voltage element. Code :
The arcing contacts in a circuit breaker are made of
A circuit breaker essentially consists of fixed and moving contacts. What are they called? 
A circuit breaker is a piece of equipment which can (i) make or break a circuit either manually or by remote control under normal conditions. (ii) break a circuit automatically under fault conditions. (iii) make a circuit either manually or by remote control under fault conditions Choose the correct answer. 
Which of the following correctly represents the sequence of operations of isolator circuit breaker and earthing switch while opening a circuit