Answer / rahul singh

In order to increase its creepage distance so that
recommended phase to ground clearance can be attained. Also
the helical shape/edges are provided in stacks to avoid the
accumulation of water in case of rainfall & mechanical
strength also increases in this design.
For 220kv Post Insultors - Creepage distance= 6125mm
For 132kv Post Insulators- Creepage distance= 3625mm
For 33kv Post Insulators- Creepage distance= 900mm
Thank you.
Rahul Singh
Electrical Engineer

Answer / k.prakashchandra

To make transportation,packing ,manufacture and erection easier.

Answer / vishal ingle

above answer is correct. in short just for ease of handling
at all the levels.

what is the main purpose of line PT and bus PT?

11 Answers   L&T,

---

Can we put 3 layers of cable tray while installing tray

0 Answers   NTPC, Siemens,

---

which type of motor is used in lift ?

7 Answers  

---

documented proof that aluminium bus bars are better than aluminium cables

0 Answers  

---

WHAT IS LINIER MOTOR?

4 Answers   BSNL, wbsedcl,

---

---

How to minimize the eddy current losses?

0 Answers  

---

what will happen to the core losses if we perform the open ckt test on high voltage side of a transformer ?

2 Answers  

---

How we can calculate the consumption in kwh of motor on basis of kw @100% load, @50% load & @ no load.

0 Answers   Grasim,

---

What is the function of the exiter in DG.

3 Answers  

---

Why 1/3 is used in symmetrical components?

0 Answers   ABB,

---

why capacitors cant used in genset to maintain power factor..??

2 Answers  

---

What are the details of ratings of different types of ACSR conductors?

2 Answers  

---