Answer / jagdeep

because if we change the sequence of ryb the resultent vector of suppy gets reversed .

Answer / rajeshkumar k

suppose RYB phase sequence is correct,we start a motor it will rotate in correct direction,and motor is safe...if phase sequence is not correct voltage and current will flow and direction will be reverse and it will affect the motor and motor will get damaged.so we should check the phase sequence when we will start a motor

Answer / sakthivel

red &yellow& blue are primary color so we are elelctrical
phase name fixing time we R Y B (vanthni@yahoo.com)

What is the Working principle of ELCB and RCCB?

1 Answers   Geo Miler, L&T,

---

What should be the value of earth resistance for an instrumentation/electronic circuit? As per which IS/IEC Code?

3 Answers   IOCL,

---

1)What will you do if main incomer VCB fail in your site ?

7 Answers   Honeywell,

---

What is the technical name of Transformer Oil ?

17 Answers   Bhel, Don Bosco, Lanco,

---

What is knee point voltage of transformer?

0 Answers   Nabard,

---

---

why the earth terminal of the three pin plug we are using bigger than the others?

2 Answers  

---

Air refrigeration cycle works on the

0 Answers   Caterpillar,

---

What is the main uses of VCB & ACB?

2 Answers  

---

why do motors burn out? I understand why adding parallel loads to a power source means more current moves through the circuit, and can destroy circuit elements by overheating. What about when you have a vaccuum cleaner intake flush against a floor, a room fan sitting directly against a wall, or a power drill trying to drill through something too hard?

0 Answers  

---

what happend when 230v dc motor we supplied a 23v ac supply

3 Answers   Hero MotoCorp, RRB,

---

for what purpose the star point is done in ct

0 Answers  

---

WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

---