How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?
1864Where double earthing is required? Is there any power specification to have double earthing?
10 46165What will hapen if we connect more capacitors than required for powerfactor control? Exactly what will be the effect on power system?
2 4561Can u explain : how capacitor act when the supply is given is a.c and d.c. I know that when d.c supply is given then the capacitor charges and becomes open circuited. But please say about when a.c is given. I have seen that when a.c supply is given ,it charges and discharges, But when we plug in capacitor to our daily supply and take it out ,then we join those wires spark will appear,which seems charge is present ,but when a.c is given it should charge and discharge
3 3981Post New Electrical Engineering Questions
Explain using drawings what is reverse PID action w.r.t PID controllers.
How to know the Max. current caring capacity of the cable by its size ?
what is through fault?
we have a rewind motor of 2Hp,2800Rpm, 220Volt AC. how can we choose the running capacitor for this motor, any formula for that?
During Testing of Maintenance Free Earthing, How deep should be the Spikes of Earth Test Meter should be inserted in the soil(one spike is 15 Meter & Other spike is 30 Mtrs away from the Main Earth Electrode. Because, recently, we observed that when spike is inserted 3-4 Inch in the earth- results are better, If spike is inserted 1 feet deep than results are increasing.
What difference between ref protection and differential protection ?
how test transfomer(3 phase75kva) by megger
why Lightening Arrester Probe sharp at Top of telecom tower.
why various test are performed on electrical panels & power cables before commissioning on site & what are these test???
What will happened if the neutral of secondary of Xformer ( Star point) Note it's above KVA rated Xformer
How many methods use the load flow solution?
A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram
what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW
what is kvarh? Please define it With calculation General motors ?
A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?
