Interested to Buy Any Domain ? << Click Here >> for more details...
One of our gas turbine generator unit "1st stage rotor
ground fault" alarm was occured several times. we tried to
measure some voltage vulue ground fault protection relay
(UNS3020a made by ABB and we measured the value of:
Ground: 0.9VDC
5V: 5.8VDC
24V: 23VDC
u+: 300 – 350mVAC
Rf1: 17.5mVAC
Rf2: 17.6mVAC
The unit still running and the alarm was reset. As of 6pm
yesterday and unitl now no alarm happened again. I our
protection relay was defective?
- 1 Answers
- 4563 Views
- I also Faced
- E-Mail Answers
Answer Posted / yvb
Stage 1 Alarm is only Alarm...Stage II is trip..so your
system working Ok...
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
For some transformers we are using solid neutral earthing while some others we are using resistance earthing why ?
10 tube light connect in mcb breaker.one tube light is fault.so breaker is tribe.how fault is rectified.(using 3wire phase,earth,neutral)
What does bode plots shows?
how to calculate the tarriff for an industry whose kva demand is 10 mva
Why phase sequence must be same in any ht motor or generator circuit?if phase sequence doesn't same whatever will be affect on circuit?
what is RNG in the DG synchronizing by PLC?
please I wont know how to calculate the vector group for power transformer ZNyn11 best regard.
one split ac how can told of this ac which Tr tell me us
why 15 kw motor winding resistance is low then 5 kw motor winding resistance?
How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?
what is mean by dual digital protection in the relay field?
in wind mill use 2100 kw asychronous generator ( induction generator ) rotor voltage : 3300,stator voltage : 690, rpm : 1511 type : MRL063E04 ' we check rotor resistance magger value found following. R-EARTH - 00 M.OHM,Y-EARTH-34 M.OHM,B-EARTH- 33M.OHM R-Y: 31 M.OHM, Y-B: 00 M.OHM,B-R :33 M.OHM HOW CAN I TAKE DECISION?pls ans. quickly
i have total 8 dg sets for synchronizing and 2 buscoupler,1 sectoin dg no 1,2,3,and 2 sectoin dg no 4,5,6,and last section dg no 7,8 ....if buscupler no 1 and 2 is off mode ..than dg no 1,2,3,will synchroniz of another dg sets?
is it possible to turn on the single phase star delta on delay timer using 24 v dc ?
State Maximum Power Transfer theorem.
