what is STUB protection in tranmission system and switch
yard area?
Answer Posted / kamal ghasemi
When the line isolator is open and the voltage from cvt to
distance relay is absent and the bus isolator and breaker
are closed; if a fault occurs between the line isolator and
the ct a feature in dist. relay called stub protection
which is an instatanious none diretional oc relay sends
trip command to breaker.This is usually in test and service
conditions.
Is This Answer Correct ? | 174 Yes | 14 No |
Post New Answer View All Answers
Define settling time.
When are the directional relays used?
Can we use 230VAC, 63A MCB for 120VAC, 63A supplied heaters load?
Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)
how can we calculate the ampacity of the electrical wire/cable. and what are the factors must be considered. pls. elaborate.
what is the cause of voltage dipp or swell in the transmission lines?
Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?
Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?
The height to which the liquid in a tank to be maintained for a certain constant velocity?
What is Plank's Law?
What do you mean by a voltage transformer?
what is the difference between torque induced and torque load?compare them with respect to dc motor?
How is the speed of a DC shunt motor related to the armature current?
I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?
I want to put this query to SENIOR & EXPERIENCED ELECTRICAL ENGINEERS. 1)I want to know about the control circuit diagrams for control panels. I found it difficult to understand. Is there ant booklet through which we can learn the circuit diagrams? 2)I want to learn about conduiting, laying cables, preparing cable schedules and various techniques which is the part of building infrastucture(construction field). I don't have any experience in this area. I have experience in control panels only. that's why i am not getting any opening in building infrastucture (construction field).Can I get the job in this field as Trainee Engineer? How to enter this field? I need job in PUNE