Answer / tejeswara rao paidi

The earthing requirements for a high tension (HT) 22 kV cable, lighting arrestor, disconnecting switch (D.O.), and air break (A.B.) switch are governed by specific standards and guidelines.

In India, the **IS: 3043 - 1987** standard provides the **Code of Practice for Earthing**¹. This standard outlines the general principles and detailed methodologies for designing and implementing earthing systems for electrical installations. It includes factors such as the resistance of the electrode, contact resistance between the electrode and the soil, and the resistance of the soil from the electrode surface outward¹.

For specific equipment like a 22 kV cable, the guidelines for use of underground cable systems and overhead conductor systems by the Central Electricity Authority could be referred².

However, the exact earthing requirements can vary based on factors such as the type of installation, soil resistivity, fault current levels, and safety considerations. Therefore, it's recommended to consult with a qualified electrical engineer or the relevant electrical authority for the specific earthing requirements for your installation.

Please note that this information is based on general guidelines and standards, and may not be applicable in all situations or jurisdictions. Always consult with a qualified professional or the relevant authorities for specific advice.

Source: Conversation with Bing, 28/1/2024
(1) Indian Standard: CODE OF PRACTICE FOR EARTHING - Law.Resource.Org. https://law.resource.org/pub/in/bis/S05/is.3043.1987.html.
(2) GUIDELINES FOR USE OF UNDER GROUND CABLE SYSTEM AND OVERHEAD CONDUCTOR .... https://cea.nic.in/wp-content/uploads/2020/04/b.pdf.
(3) MATERIAL SPECIFICATIONS CELL - महावितरण. https://www.mahadiscom.in/supplier/wp-content/uploads/2020/01/Metering-Cubicle-1122-kV33kV-29.08.2019-FINAL.pdf.
(4) TECHNICAL SPECIFICATION FOR XLPE POWER CABLE - महावितरण. https://www.mahadiscom.in/supplier/wp-content/uploads/2018/08/HTXLPESPEC2006.pdf.
(5) TECHNICAL SPECIFICATION FOR 33/132/220 KV H.T. XLPE POWER CABLE - OPTCL. https://optcl.co.in/writereaddata/Tender/150619110614E31-33-132-220KV_XLPE_CABLE_SPEC_12042019.pdf.
if any doubts regarding technicality refer the url mentioned

In Power transformer oil temperature or winding temperature will be high

3 Answers  

---

What is the purpose of shunt trip in ACB function?

1 Answers  

---

How to calculate the TR (AC's)

4 Answers  

---

what is skin effect? why is it absentin dc system

22 Answers  

---

What is the standard height of installation of Socket & switch from Finish Floor Level as per the IEC/IS Rules?

1 Answers  

---

what is the function of breather in a transformer

29 Answers   Areva, Bhel, RKM Powergen, Vijai Electricals,

---

what are the alternator cooling system? how it is represented?

1 Answers  

---

What is the amount of no load current of 630 kVA tranformer voltage ratio 11kV/440V ?

13 Answers  

---

I have a table fan of Rallifan Make. When I overhauled it I found a stator winding and an aluminum die cast rotor. So it is supposed that it is a 1 phase induction motor. But there are only two terminals coming out and there is no capacitor. Can any one tell how this motor works? or which type of this motor is?

1 Answers  

---

what is the working principle of tube light?

2 Answers  

---

induction 3 phase motor terminal connection

0 Answers  

---

i have total 8 dg sets for synchronizing and 2 buscoupler,1 sectoin dg no 1,2,3,and 2 sectoin dg no 4,5,6,and last section dg no 7,8 ....if buscupler no 1 and 2 is off mode ..than dg no 1,2,3,will synchroniz of another dg sets?

0 Answers   Crown Buildtech,

---