Answer / kunal

Motors are generally cooled by three methods :
1. naturally ventilated: no special ventilation cooling by
natural conduction and radiation.
2. blower ventilated:
separate blower, with small external motor and filter
provided. which allows motor to accept additional external
air and force heated air out
3. separately ventilated motor:
separately ventilated by ducted air flow through the enclosure
more information can be found at
http://www.globalspec.com/reference/10786/179909/Chapter-3-AC-and-DC-Motors-DC-Motors-Enclosure-Types-and-Cooling-Methods

Answer / logu

motor top side extra readiator unit fixed and inlet cold
water circulation. water upserve the hot air...then reduced
the motr windng temp .

The mechanical angle is electrical angle A always less than B greater than or equal to C equal to D less than or eaual to

1 Answers  

---

in three phase with neutral connection, what will happen,if the neutral is in open condition with single phase distribution panel

4 Answers  

---

what is a tri vector meter? what are the tri vectors?

2 Answers  

---

iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

0 Answers  

---

define frequency ?

14 Answers   KPTCL,

---

How power factor of electric system improved?

6 Answers   Nalco,

---

we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?

0 Answers  

---

what is the difference between RMS meter and normal meter

3 Answers   TATA,

---

How to calculate the fuse rating depend upon the DC circuit?

0 Answers  

---

what is insulation percentage of motor 3 phase and singlephase

1 Answers   Infotech,

---

is there or does RCCB work for single phase connection?

2 Answers  

---

how to reduce power loss when the tranmission under long distance?

19 Answers  

---