Answer / bhavesh chauhan

First of all let us know what is Tan Delta......?
Tan Delta Testing of a transformer or a CT or a PT determines integrity of insulation of the equipment which determines the remaining life of the equipment. Tan Delta is also called as loss angle or Dissipation Factor Testing.
In a perfect capacitor the curve of voltage vs current are phase shifted by 90..in case if any impurities are present the phase shift wont be 90 degree any more which means it will be less than 90. Thus by measuring new angle developed less than 90 we can calculate the loss angle or the level of insulation.

Measuring of Tan Delta is very simple..We have a Tan Delta Kit which has two terminals coming out of it. Applying the two terminals on top and bottom of the equipment and injecting the current through kit we can get the values of the test..
Tan delta Point is nothing but a point covered by a nut bolt on the bottom side of Bushing of transformer and CT..............

Answer / chetan.sutavani

Tan Delta point in the CT is located at the bottom of the CT. It is provided specifically for TanD testing so that we can find the capacitance and TanD between CT primary and its structure.

It is It is usually connected to ground. But at the time of test, it should be separated from ground and should be connected to LV lead from the TanDelta test set.

When VFD is connected to a 3 phase main supply there is load current difference between incomer to VFD and outgoing from VFD.

1 Answers   Shasun Chemicals,

---

how we are measuring the import and export power?

1 Answers  

---

In 2500kva transformer how much is the withstand High voltage power frequency between primary to secondary and earth? And secondary to primary and earth?

1 Answers   Honeywell,

---

What is the basic of DTH.

0 Answers   IOCL,

---

what is electricity.

6 Answers   HP, L&T,

---

what is the ground fault relay,which purpose it will be use,clearly tell me plz

0 Answers  

---

what is difference between power & distrubution transformer ?

3 Answers  

---

WHAT IS INERTIA,AND WAT IS TORQUE.

0 Answers  

---

What are the condition for parallel operation of transformers?

2 Answers   Alfanar,

---

Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?

5 Answers   HAL,

---

why the voltage transmission is always in a multiple of 11? e.g. 110 V, 220 V, 33 kVA, 11 kVA

16 Answers   IAF, MahaGenco,

---

how much allowable resistance that can be difference in motor all coils?

0 Answers  

---