What the methode get earth resistance?

2 Answers  

---

What is IPXX?

2 Answers  

---

In a transformer ,when voltage decreases current increases. but this is a violation of oms law.why?

15 Answers  

---

why DG sets power factor is 0.8 lagging.

1 Answers   Cummins,

---

how oil in the MOCB was reduced compared with OCB? what are the features of the MOCB?

0 Answers   Asahi, BARC, K-Electric,

---

dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?

0 Answers  

---

what is the purpose of taking HV test in LT panel.

1 Answers   PCE,

---

what is the different between surgearrester and lighting arrester

4 Answers   HPCL,

---

Why we say three phase voltage 440v.

2 Answers   VDP,

---

Why compensation is necessary in feedback control system?

0 Answers  

---

what is a drive ?

3 Answers  

---

Hi.I want to ask how to calculate contactor rating current? for example I have 460 V , 100 A (induction motor) calculate contactor rating current?

2 Answers  

---