Answer / abdurrahim

For pipe earth pit its maximum 2 ohms and for grid it is
considering below 0.02 ohms..
to measure resistance for earth..there is one instrument
call earth resitance testor.Its value in ohms.
Resistivity means resitance/ meter...

Answer / kashifhabib

I dont agree with your answer

Earth Resistance can be measured with Megger.
Maximum Earth resistance should be 1 Ohm (Accroding to IEEE)
Maximum Earth resistance should be 2 Ohm (Pakistan WAPDA)

please describe the Transformer setting, Motor setting, I/C setting, Tie setting

0 Answers  

---

what is recovery voltage & transient voltage ?

1 Answers   Bhel,

---

On what principle electric motor works?

0 Answers  

---

what is different between DIGITAL and ANALOG?

2 Answers  

---

exact definition of reactive power in power system

2 Answers   Sreetech,

---

Why colled 440V to 3-phase supply.

0 Answers  

---

what is the use of earthing?

1 Answers   CPCL,

---

which relay is used for both detection & correction?(there is only one relay)

2 Answers  

---

In single phase ac ups supply when current is measured with tong tester neutral current is found more than phase current.What is the reason?

0 Answers  

---

if u give d.c. supply to transformer primary then what happen.&why??????????????

4 Answers   DCS, DRDO, HCL,

---

what is corona effect

3 Answers  

---

Why 11KV/440V distribution supply use for Domestic use?

3 Answers   Essar, Getco, Nissan,

---