Answer / 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.

Answer / greg

tan delta gives the ratio of resistive current to capacitive
current.therefore it shows the amount of resistive current
flowing through the insulation,in other words it denoted the
dielectric strength of bushing.

hi!!! i have a question that how the thermal test in winding temprature test is taken can anyone explain me in detail??? i will b very thankful!!!!

1 Answers  

---

140 is load amps for a equipments and what ratio of CT requied for installimg ammeter to amps montering purpose?

1 Answers  

---

What is the lockout relay

0 Answers  

---

what is neutral voltage

3 Answers   Power Grid,

---

what are the protections used in power transformers of 5 mva and above

2 Answers   ESRI,

---

If the line voltage is reduced to 75% of its rated value then by what percentage current will reduce ?? 75% 25% 50% no change and why ?

0 Answers  

---

star delta connection used in reduce the starting current at 3 times . how its reduce the current please explian .

7 Answers   HP,

---

where does 22kv line starts

0 Answers   Eskom,

---

Is any generator is developed which is operated with out diesal or other expensive source?

0 Answers  

---

sir i have a car stereo system and there is jack on him so can u tell me a way to find out their power terminals on the jack or on the circuit board"

0 Answers  

---

How can we get electric power from lighting ?

3 Answers   TATA,

---

Difference between ELCB and RCCB?

5 Answers  

---