Interested to Buy Any Domain ? << Click Here >> for more details...
what is STUB protection in tranmission system and switch
yard area?
- 9 Answers
- 74973 Views
- KSEB, Power Grid, I also Faced
- E-Mail Answers
Answer Posted / abdelrahman hussein
The stub bus element protects for faults between two breakers in a breaker-and-a-half or ring bus configuration when the
line disconnect switch is open. At the same time, if the line is still energized through the remote terminal(s), differential
protection is still required (the line can still need to be energized because there is a tapped load on a two-terminal line or
because the line is a three-terminal line with two of the terminals still connected). Correct operation for this condition is
achieved by the local relay sending zero current values to the remote end(s) so that a local bus fault does not result in
tripping the line. At the local end, the differential element is disabled and stub bus protection is provided by a user-selected
overcurrent element. If there is a line fault, the remote end(s) trips on differential but local differential function and the DTT
signal (if enabled) to the local end are blocked by the stub bus logic, allowing the local breakers to remain closed.
| Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
What is open loop and control loop systems?
What is CCT (Correlated Color Temperature) ?
hi plz send me reliance placement papers..i.e electrical technical papers that have been asked in reliance test.
Write the programming software name for LG, SIEMENS,Messung,AB
List the advantages of star-delta starter with induction motor?
How can I calculate ISF of current transformer?
In CTs tan delta point should be earthed , what is the reason behind it?
after how many spot we must chang secondry cable in portable spot welding gun?
iam working in power plant. In hot places tube lights are glowing at the end portion only. what is the reason for that?
EXPLAIN WHY THE SURGE CURRENT RATING OF AN MCCB OR CIRCUIT BREAKER DECREASES WITH INCREASE IN THE RATING OF MCCB OR CIRCUIT BREAKER.
if 6 earth pit value is 1.5 ohm then what should be the number of earth pit to make the value .8 ohm
Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB
can mini-curcuit supply MIL-tested transformer !
what is harmonics? what are the factors it will depend upon
(1)The demand for electricity , the amount of renewable generation available, the amount of fossil fuel generation available and the cost of the fossil fuel generation are shown in table below period(hrs) demand(MW) renewable (MW) fossil- fuel(MW) cost of fossil fuel(MW) 00.00 - 01.00 2000 1800 2000 30 01.00 - 02.00 2300 2500 2000 30 02.00 - 03.00 2500 2700 2100 45 03.00 - 04.00 2900 3100 2100 50 04.00 - 05.00 2700 2600 2500 45 05.00 - 06.00 2400 2000 2700 50 06.00 - 07.00 2200 1800 2000 36 07.00 - 08.00 2100 1600 2000 36 Assuming that the renewable generation incurs zero cost, determine an optimal generation schedule(specifying the amount of renewable generation and fossil fuel generation used in each period, the cost for each period and the overall cost for 8 hours.)
