what is the difference between CT and CVT in EHV Sub Stations
- 4 Answers
- 26289 Views
- Hofincons, Lanco, TATA, I also Faced
- E-Mail Answers
Answer Posted / limbian
CT - used for protection
CVT - for Metering
| Is This Answer Correct ? | 2 Yes | 18 No |
Post New Answer View All Answers
what is transient stability analysis means?
how to identify the cable quality and what is flame proof cable
how the synchronizing is obtained at bus couplers in grid substation? (because there we cannot change the frequency in one of transmission lines like in generator synchronization)
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
For an induction motor wat is the loading/unloading cycle duration or interms of L/UL ratio/ percentage?
what is meant by surge? what we called for high currents?
What is genrally the % Impedance of a Dg set? How can we calculate Earthing conductor size for a DG set?
earth also having a gravitational force (magnetic field of north and south)but it attracts any object compare to this theartifical magnetic cant perform same as earth why?
What are the necessary components of the feedback control system?
What is dielectric loss?
why the making current is more than then the breaking current and if its true then its about a controling circuit or breaker power contact points
What is the main cause of magnetism?
what is PDU in transformer?? which company manufacture??
What happens if we give the supply to the rotor of induction motor and make its terminal shorted?
The efficiency of a 100kva transformer is 0.98 at full load as well as half load , for this transformer what is the Copper loss at full load ?
