Answer / hardik vyas

TAN Delta test gives you the condition of the insulation
and also it helps in predicting that how long this
equipment can be in service. In short it gives you the
detoriation rate of insulation so you can predict the
remaining useful period of perticular euipment.

Answer / ashish barak

when insulation is perfect , there is only capacitive
current and angle between current and voltage is 90 degree.
as insulation degrades with time there is a flow of
resitive current also. the angle between capacitave and
resultant current(sum of resitive current and capacitive
current)is this "delta" angle.
as it keeps on increasing it indicates winding is
deterioating

Answer / swati patkar

for checking transformer bushing insulation so that the life of transformer can be predicted and maintenance and replacement should be done timely.

Answer / venky_eee07

to checking transformer bushing

how harmonics are generated due to nonlinear load & how harmonic filters work?

1 Answers  

---

1- What is the Polarization Index number be good for 15KV 3c#500MCM electrical cable? 2- Can I use the IEEE Std 43-2000 to perfom the PI test? Thanks

0 Answers  

---

1 Kva = How many HP

9 Answers  

---

Why we use 4-20 mA Analog signal for the PLC input? Why not 0-20 mA? Why not 5-25 mA?

0 Answers  

---

I need bhel electrical test pattern & paper

0 Answers  

---

Why sometime i receive GCU fault /Excitation voltage loss in my Generator Synch Panel .

1 Answers  

---

What is the meaning of Fault level rating?

1 Answers   Balrampur Chini Mill,

---

what is meant by tranformer impedance?

0 Answers   Synergy,

---

what happens in a genarator when rotor supplied with ac instead of dc

3 Answers  

---

i want to know is it possible to generate usefull power by coupling generator with motor & supply gives to motor by battery source then generator generates power. remove the battery source given to the motor & feed the supply from some of the generated power supply to the motor & motor runs continously. generator generate power contnously.is it possible ?

5 Answers   UltraTech,

---

Does voltage and current can be seperated?

2 Answers  

---

Can motor act as generator (OR) vice versa? explain how does it do please post the answer technically

11 Answers   GM General Motors,

---