When we change the tap position of 10MVA transformer it suddenly tripped with Out of step indication and also with Static differential relay indication, Transformer Bucholz relay indn and Low oil level indication. Before 1 week the same problem occured by changing the tap position. but at that time only oltc bucholz relay activated. After testing the TxR Relay team & PET team cant find any solid reason. The values are ok also. So plz answer wat's the reason for this incident? anybody plz help.
3 6123There is 3phase power cable from 1 point to the other point which is 100m away. Two point equipped with power meter and recorded 1st point is 205kW while the 2nd is 202kW and each phase average carry 400amps. To calculate the resistance of the 3phase power cable, is the formula using will be P=I2R?
3 3888Post New Electrical Engineering Questions
Whether amorphous core transformer is available in India?.If available then up to what rating of voltage and KVA?.
What are different types of control systems?
what are the steps involved in generator load test?
What are the advantages and disadvantages of open loop control system?
Why need 3phase machine double earthing?
when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.
How many sprinklers should be in one pipe line?
how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.
How is the connection of the tap changer on the HV side been made?
Why using synchronising methed in DG's sets?
how we can calculate power factor in single phase & three phase ?thank u
how wecalculate breaking capcity of acb mcb mccb .explain with example
What is resistance of 50meters, 16sq.mm, single core copper cable?
how external lighting design? please give examples?
is that any software calculator to calculate the size of cable
