Answer Posted / ashish

tan delta (loss angle ) and cap is taken of the enquipment
such as CTs and TRF bushings wherein paper and other
material is utilised in its insulation.
tan delta and cap values indicates to you the condition of
the bushing insulation.
if a plot is plotted aginst the no of years of the bushing
in service and the value of tan delta taken every year, you
shall get the trend of insulation detoriation.
the higher side of tan delta value is 0.007.

can we conduct the swineburne's test on a dc series motor? why?

2087

---

what are the applications of transistors with low dc gain, high dc gain and medium dc gain( beta)?

1708

---

What type of pipe material G.I or M.S is used for sprinkler system?

9110

---

what are the advantages and disadvantages of oil filled cables over XLPE cables

19320

---

what could be the RMS value and average value of a 4 phase sine wave?

1817

---

What is Phase to Phase clearance for 800V System Operating Voltage as per IEC61439

966

---

In which of the following case, the rotating magnetic field is reversed? A regenerative breaking B plugging C dynamic breaking D forward motoring

1901

---

how to Select its CORE in electrical cables based on its applications? or Application of various types of electrical cable based on it CORE?

3193

---

What will happen if a dc source is given to a tubelight. Will it work or wont it work....

1924

---

what are inductive and capacitive voltage transformers.what are their applications

1894

---

what exactly commisioning work does in electrical site work... LT side?..

1884

---

Can anyone please give me the parameters , formula needed to calculate the circuit breakers for building services.Thanks

2076

---

How do i carry out or know the vector group of a Dyn1 and Dyn5 transformer

1974

---

what is the function of capacitor duty contactor in an capacitor panel???

4092

---

What is meant by coupling capacitor?

1013

---