Answer / kj

On a new alternator the markings are usually U V W N
These match to R Y B N.
But it may be that the phase rotation in the building is
backwards and all the 3 phase motors will then run
backwards on the new alternator supply.
A phase rotation meter should be used to confirm that the
phase rotation is identical.

Answer / b.janardhana rao

Normally we erection the new generator we connect the main supply from DG set to Electrical pane. we charge the panel from DG supply then we check the direction of motors. if it is reversed the we change the polarity of 3 phases. RYB to change RBY.

why we use sinosidal voltage / current instead of others in system?

0 Answers  

---

what is the different between RCCB & ELCB

3 Answers  

---

what is mind in cable

0 Answers   BARC,

---

working method of railway electricl loco in single wire 25000 volt

1 Answers  

---

what is the different between HT auxillary relay resistance and transformer tripping relay resistance?

0 Answers  

---

DG Earth Value?

0 Answers   Reckitt Benckiser, Vodafone,

---

what is the minimum winding resistance of 30hp compressor, to run or to switch on

0 Answers  

---

Shunt reactor is used in EHV Transmission line for..............?

2 Answers   NTPC,

---

The power supplied to a 33microF capacitor from a 120V, 60Hz source will be

0 Answers  

---

WHERE IS THE LIGHTING ARRESTER SHOULD BE PLACED IN DISTRIBUTION LINES?

6 Answers   Bhel,

---

Shall we use Dyn1 transformer in place of Dyn11 for motor application as a distribution transformer

1 Answers   NSL Sugars,

---

What type of wiring series or parallel is used for conventional and addressable type FAS & why?

0 Answers  

---