A lightning arrestor connected between the line and earth in a power system

Related MCQs

• Lightning arresters are used in power systems to protect electrical equipments against
• The principal information obtained from load flow studies in a power system are 1. magnitude and phase angle of the voltage at each bus. 2. reactive and real power flows in each of lines. 3. total power loss in the network. 4. Transient stability limit of the system Select the correct answer from the codes given below :
• The order of the lightning discharge current is :
• Earth wire on EHV overhead transmission line is provided to protect the line against
• In case of a 3-phase short circuit is a system, the power fed into the system is :
• Pure inductive circuit takes power (reactive) from the a.c. line when
• In an R-L circuit connected to an alternating sinusoidal voltage, size of transient current primarily depends on
• A generator is connected to a synchronous motor. From stability point of view it is preferable to have :
• Consider the following statements : The transient stability of the power system under unbalanced fault conditions can be effectively improved by 1. Excitation control 2. phase-shifting transformer 3. single-pole switching of circuit breakers 4. increasing the turbine input. Of these statements
• The Transients in the power system occurs for