Difference between directional earth fault and
non-directional earth fault
Answers were Sorted based on User's Feedback
Answer / manesh s
Directional Earth Fault is the Fault(between Phase/s to
Earth)in the system,if system is using only one source, so
Fault would be in one direction(towards the system)
where as Non-Directional Earth Fault is the
Fault(between Phase/s to Earth)in the system,if system is
using two or more source, so Fault would be in two
direction(away or towards)
Is This Answer Correct ? | 9 Yes | 4 No |
Answer / jerry smith
Directional Earth Fault detection is used to isolate a
fault, when using more than one source of power input.
Current Transformers are used to verify the net sum of
current as zero between any two sources of power. If there
is a fault, the breaker between the power sources is
OPENED. The protection logic will then see if the fault has
cleared. If the fault has cleared, the fault is on the side
with ungrounded power source, and will protection logic
will trip the ungrounded power supply. Conversely if the
fault continues to flow after the bus tie is OPEN, then the
fault is on the side of the grounded power supply, and the
grounded power supply will be tripped.
Non-directional Earth Fault would be a simple fault
detection, as located on a generator neutral.
Is This Answer Correct ? | 2 Yes | 4 No |
what's interlock relay ?
3 Answers International Mega Food Park Limited, National Power Training Institute NPTI,
operation
Qatar Fertiliser Company (QAFCO) Shortlisted me for interview (got the intel from my source) for Field Operator- Utilities post. Please let me know what kind of questions they asked? ... this position requires 5 years of experience in Power Plant and background Diploma in Electrical/ Mech. ... my Background is Electrical and I am a sub Assistant Engineer (Operation) at a private HFO based Power plant... PS: Please Let me know what preparation should I take to obtain the Interview which will be take place In Bangladesh soon
Why superheated are started before I'd and rd fan?
what is turn down ratio
What is the the sequence/logic of burner management system in boilers. What is purging and scavenging?
how to differentiate between "ALL fuel lost" and "All Fuel Lost" in Boiler MFT condition?
How to calculate air to fuel ratio in boilers
transformer shut down process.
Can any one advised me how we can measure the losses in a 11kV/415v power transformer? We have no access to the incoming mains into the primary of the transformer. Can one derive something useful by measuring temperature rise in the transformer?
what is restricted earth fault explain in details
why seal air fan is used and where it is used and where is suction taken from