Answer / arockia doss

Reasons Behind :

1. Loose Connection
2. Three phase cut into two phase
3. Winding Failure
4. Mechanical Damage/Overlaod
5. Higher Voltage/Frequency

If its so ,Breaker should get trip. If not it will damage
the motor.

Answer / pillay

that means the motor is finding it harder to maintain
the speed. it could be due to so many reasons as already said
by DASS and VENKAT.
What happens is if any of the motor protective devices dont
trigger the motor to stop than it will continue to run
until the windings give way due to overheat and finally insulation breakdown which is commonly known as burnt.

Answer / venkatesh sk

moto should be terminal loose& connetion&load more &
frquency very&motor capacity low& voltage low

Answer / gagan kumptar gua

when a motor take high current the wiring of the winding
will be burnt becouse H is proposnal to square of
current.it happens due to loose connection or over load and
change in frequency of voltage.

Where -48 volt DC use & why?????????

10 Answers   Ericsson, INDUS, Indus Towers, Telecom,

---

what is the difference between synchronization and paralleling?

13 Answers   BARC,

---

how to select a capacitor, i mean we use 3.5 mico ferad cap for a celling fan,but how to select a cap for 1h.p motor,etc.........

1 Answers  

---

i want to know how to calculate the battery capacity based on the UPS . ex i want to run have one kva UPS Which should run 10 hours ? in that case how many batteries to be installed and what will be the AH Value .

2 Answers  

---

What is star-delta transformer?

0 Answers  

---

a governer in an Ic engine controls the

0 Answers   Caterpillar,

---

ITI r/tv trade APPLY (J.T.O VACANCEY) ALSO INCLUD AITT ELECTRONIC,WRITEEN XAM DONE 23.03.10 BUT NO RESPONCE WHY ANATHER ID gopal_gh007@rediffmail.com

0 Answers   KBC, wbsedcl,

---

in dc shunt motor if field winding is shorted then

0 Answers  

---

Which material is used for the core of a transformer and why?

0 Answers  

---

can we use IGBT as a AC-DC converting device in the applications?

2 Answers  

---

what is Distance protection & how did it work

2 Answers  

---

what is the difference between Ith & Iu rating in MCCB. Particularly on SACE ABB Circuit Breaker?

2 Answers   Siemens,

---