Answer / joshykollam

Method 1 . By Color red, yellow , blue
Method 2 . By a Fluke phase sequence meter
Method 3 . By winding lead notation- u1,v1,w1 and u2,v2,w2-
curresponds to R,Y,B in the case of a transformer or motor
The easy way to use Phase sequence meter

Answer / md ibrahim

phase sequense meter

Answer / b shelar

u can be find out easy to use dark-bright lamp method.

While connecting the flood light plug on to the 415 V distribution panel,there was spark and the cable got burnt. Three ignitors of the flood light also burnt of. The lamps are of 400 W (total 6 lamps) connected through 1.5 mm2 cable. The plug was immediately removed from the circuit. There was a 30 mA RCD connected and a 250 A MCCB; however both did not trip. What could be the possible reasons for the circuit devices not to trip?Can someone assist please. Additional info if needed can be provided.

2 Answers  

---

what is the difference between servo voltage stabilizer and general voltage stabilizer?

1 Answers  

---

whatis the test procedure for lightning arrester which was installed one year back. i want check it whether it is working or not.

1 Answers  

---

how to determine the inrush current of a transformer

0 Answers  

---

How does a star connection and delta connection work? How does the star connection save starting current and how does it change to delta?

3 Answers  

---

---

In Single Phase AC Supply,If Voltage between Phase and Neutral is 230V means what will be the Voltage between Phase and Earth?

2 Answers  

---

what type of motor used to move a 1 ton gate? and relate ratings with load.

0 Answers   Khidmah,

---

Application of statically induced emf

0 Answers  

---

what is slip ring induction motor? How it works?

1 Answers  

---

What is the difference between sensitive earth fault and restricted earth fault in power transformers?

4 Answers  

---

in Contactor opearation Why there is a difference in the values of the operate and release voltage in case AC supply

0 Answers  

---

Installation method of self treated earth electrode.

0 Answers  

---