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Grounding Riddles No.43 - Selective Earth fault protection in multiple generators
Six No 11kv star connected generators are paralleled with each other on common bus through dedicated bus. Common Low resistor NGR with ....
Author : Muhammad Waqas - From: Pakistan
Grounding Riddle No.42 - Grounding of generators
Grounding of 3nos l.v 400v orif it is for m.v 13.8kv generators
is it better to have separated individual earth pit for each gen , better than collecting ....
Author : mohammed hasssen - From: Egypt
Grounding Riddle No.41 - Shock after touching the conductor
I have seen one video in which a man standing at the top of the train get shock after touching the conductor (man immediately dies) however ....
Author : Deepak
Grounding Riddle No.40 - Grounding of cable Joints
Explain the Grounding methods and affecting parameters in EHV UG cable joints.
Author : Soman - From: India
Grounding Riddle No. 39 - Grounding systems for Instrument Transformers
Explain the grounding methods of Instrument Transformers in EHV Substation
Author : soman - From: India
Grounding Riddle No.38 - NGR Selection
I wonder if we can use one NGR for six 9 MW Alternators having 11 kV Gen voltage? can some one help out, how to design/calculate the Resistor value
Author : Aijaz - From: Pakistani
Grounding Riddle No.37 - One grounding system for electrical, instrumentation and...
How do i calculate the number ground rods for different grounding systems? is it possible to make only one grounding system for electrical, equipment, instrumentation and lightning protection grounding?
Author : Deusdedit malulu - From: Tanzania
Grounding Riddle No.36 - Grounding Transformers
We are using grounding transformer of following specs
rated voltage 33 kV, connection Zn(zigzag) , fault current/ph -266.7/30s, Zo=52.7ohms/ph Po=1244 W , Io=0.07 A
Author : Sunil - From: India
Grounding Riddle No.35 - Magnitude of Gound Fault Current
What will be the value of ground fault current?
Say, I have a substation which is fed from a 630kVA, 11/0.433kV, 4% impedance, Dyn11, solidly grounded neutral transformer. ...
Author : Bishu - From: India
Grounding Riddle No.34 - Neutral advantage
Why Neutral is used in Electrical System?
Author : Fayaz - From: India
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