21. What is the purpose of taking Capacitance and Tan Delta
Test in
Transformer bushing?
22. What are the protections to be used for Generator?
23. Draw the vector diagram and condition for the
following: 1) Dyn1
2) Ynd0 3) YnYn0
24. What happens when the polarity changes in CT? Explain
briefly?
25. Explain the Term in CT Name Plate – Class: 5P10
Answers were Sorted based on User's Feedback
Answer / raul
-it is done for insulation testing i.e. to measure the loss
angle.........
-merz price circulating current scheme (i.e. differential
protection), balanced earth fault protection, protection
against unbalanced loading which leads to negative sequence
currents........
-not possible to draw in this format........
-no change will occur if the polarity is changed bcoz it is
independent of the polarity
-class 5 and VA rating is : 10
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / naresh
Pole slipping,backup protection,differential,dead machine
protection,low forward power,voltage control over
current,current control over voltage,df/dt,if ct polarity
chenge in protection reverse active power flows to relay
and diff current flow and in metering import power wil show
in energy meter,for five times of primary current 10%
composite error.
Is This Answer Correct ? | 0 Yes | 7 No |
why it is so called as xlpe(cross linked poly ethyline) cable?
The objective of connecting a resistance and capacitance across gate circuit is to protect the SCR against
what is skin effect
about your self?
4 Answers Hyundai, US Technology,
2 t/f operating in parallel will share the load according 2 their- a)leakage reactance,b)pu impedence,c)efficiency,d) rating.
WHAT IS THE DIFFRENCE BETWEEN EARTHED AND UNEARTHED CABLE (XLPE)?
What is the diff. between single compression and double compression gland
Give the selection criteria of a 3 Phase transformer for industrial purposes ?
why+ve is earthed in electrostatic precipitator in thermal power plant
Why we are using Isolation Power Transformer inplace of commercial power transformer? What's the difference between them?
what is the technical diffrences of mccb and acb
what is the use of Antipumping in HT breakers.