Answer / pswin

The purpose of insulation resistance tester is to test the condition of insulation. On three phase motors, we need to do the insulation test between winding to windings and windings to ground. Before the testing, we need to take out the connections(star or delta). Choose 500 V scale on meter and proceed to test.Full scale will be 100 Mega Ohm. Minimum will be 0.5 Mega Ohm and if lower than this result, motor cannot be used.

Answer / lenovouser

Very simple. Measure ir between

r-y,y-b, b-r r-e,y-e,b-e

what s a servo motor? how to control the servo motor? and its application, purpose of using?

2 Answers   Arabian Pipes,

---

is emf is indued if dc is passed through coil

5 Answers  

---

wht d.c produces corrosion

1 Answers  

---

starting torque is increased and current is decreased by using external resistance in a slip ring induction motor. How??

3 Answers  

---

In MEP Services what are parts of STP and what are there function?

0 Answers   Tenon,

---

what is electricity

4 Answers  

---

HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES? WHAT IS THE BASIC TECHNIQ OR FUNDA USED BEHIND THIS ? SPECIALLY EXPLAIN?IMPEDANCE METHOD.

2 Answers   ABB,

---

Why not implimenting power factor in Diesel generator

6 Answers   HP,

---

What Is the Difference Between Lightening Spike and Lightening Arrester?

1 Answers  

---

how can check the resistance of battery contact?

0 Answers   Cipla,

---

what is mean by transition resistance of transformer?

0 Answers  

---

why we use separate earthing for two seprate machine??

1 Answers  

---