Interested to Buy Any Domain ? << Click Here >> for more details...
What is the basic difference between 90% stator earth fault
and 100% stator earth fault, and its phenmenona?
- 4 Answers
- 19478 Views
- Reliance, I also Faced
- E-Mail Answers
Answer Posted / a.p.nanjappa
This is an application with power plant genrator protection.
In early 1950-75,only 90% stator earth fault protection
used for Generator Stator winding.
GE,westinghouse,hitahachi,GEC,BBC,KWU.ON 1975 ONWARDS,
THEN 100% STATOR EARTH FAULT DEVELOPED USING OPEN DELTA
VOLTAGE OFGENERATOR AND USING FIRST AND THIRD HARMONIC
BRIDGE.
WEST AND EUROPE,INDIA USED GENERATOR NETRAL GROUNDING
TRANSFORMER AND ON SECONDARY OF THIS TRANSFORMER90%STATOR
EARTH FAULT PROTECTION IS USED.
FOR 100% STATOR EARTF FAULT USE OPEN DELTA VOLTAGE.
Russian practice is use voltage transformer for generator
neutral gounding.
when I was DISCUSSING this with european manufacturer, they
want to delete 100% protection.In a generator it is meaning
less.fault is fault.It is time consuming for repair.
As a new challenge-generator manufacture claim 100%
availabilty of Generator with VIP.
/MICADOUR ELASTIC INSULATION. In gas turbine a single
generator rating is selected for single shaft gas turbine
and steam turbine. upto 275MW. AND 400MW
| Is This Answer Correct ? | 2 Yes | 2 No |
Post New Answer View All Answers
how can you calculate fault level ?
how can you size an automatic voltage regulator?
how to select electrical equipment such as fuse,dg,transformer,motor,msb,wire,cable as per the connecting load..please mention any books to design,take licence
describe the A.C. Generator Testing procedure
primery try cell?
how does a submersible pump work..?
how to calculation increase capacitor,increase power factor for three phase.
How many wall/floor flange will i use in bus duct system if we have in our design a 35th floor building.
What will be result if we connect LT votage to the terminal of HT motor?
i want use the cable size 16cx4 core aluminium usege watts 240x2000w this cable size is correct?
HOW DO YOU CAN CHECK A 15KV DIODE, WHETHER IT IS OK OR NOT?
Draw the circuit of clapp oscillator?
what is self capacitance of inductor
Define steady state error.
What is class ab operation?
