Hello friends ,
There are total 6 Nos of 11kV , 3.2 MW cranes ( ship to shore ) to be fed from a 11kV substation. Total Connected load is equivalent is 19.2 MW . Maximum Loading for the incoming 11kV feeder is limited by the utility is 5.4 MW . To support 19.2 MW load ,then should have minimum...
Hello all,
I'm planning to develop a suitable 20kV distribution network in an area of Djibouti to feed small industrial units and ware house located in a certain area .Max .load requirement of per industrial units is around 700kVA and small units requirements starts from 50kVA .
Total load...
Dear All ,
Please help me to choose a suitably rated Solar Cell ( advisable to indicate the manufactures name also ) as a standby powersupply for the Antennas ( ROR ) mounted on the high mast poles in our container yard storage area .
These antenas are located on defferent location on the...
Thanks rrghunath ,
What kind of problem would encounter by not having earth reference on the 11kV Side .I have only O/C protection and Eearth fualt indicator on the Ring IN / Ring Out feeder ofthe RMU which is feeding the 11/.4 kV transformer. Any kind ofadditional protection we should...
Thanks DISCOP,
I would use directional O/C& E/F relays (Eg : CDG relays ) at the ring in & out feeders of the each substations and non directional featured O/C & E/F relays ( Eg:MICOM P121 ) for the outgoing crane feeders of the each substations .And the 132/11kV feeders ( 2Nos ) at each...
Thanks DiscoP
As we are thinking to get rid of pilot wire translay protection due to no guarante on the existing pilot wire , I feel the better idea is to have directional relays at the incoming feeders of all substation and the same provided at the 132/11kV S/S End .
Would it be a best...
Is it possible to use a stepdown transformer (11/.4kV ) ,1MVA transformer can be used for step up transformer from .4 to 11kV. If yes ,What are the precaution to be consider such as changing the CT polarity of the primary side etc ?????
Dear All ,
Please enlighten me with some good solutions .
In our 11kV electrical distribution systems ,Five nos of 11kV substations(connected as Ring ) are fed from 2nos, 800 A feeders of 33/11kV primary substation . The ring in & ring out cables are 2 Runs of 3cx 185 sq mm PILC/Al cables...
Dear Forum members ,
Can anyone help me in providing the impedence datas of
3cx185 sq mm PILC Copper cable 6350/11000 V cable
I mean Positive sequence impedence and zero sequence impedence of the above cable .
rana
Low pressure alarm trip contacts possibly irrelevent in the VCB circuit breaker .
Other available contacts can be used in the modified trip circuit for VCB panels
