Answer / arasu

we have two types of interlocking the one is electrical
interlocking another is mechanical interlocking.both of
them used for EB/DG chaneover or reversing of motor.so we
give the contactor coil voltage through to the another
contactor NC.

Answer / harikumar

here contactors means power comtactor or control contactors
for contol the motor for eg:, in such cases the motor
control is for btoh direction of rotation, hence one
contactor for closkwise rotation and other for anto clock
wise rotation, and two pushbuttons for sepatare controll,
if by mistake someone press two pushbuttons and it can
damage the winnding and power failure due o mis match of
faces, thus the coil supply to one contactor coil is given
throiuh the interlocking of opther contactorso that if one
contator holds the other will not holds or gets on, thus
protction is made.

when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)

0 Answers  

---

Electrical Design specifications

1 Answers   Sabic,

---

How to calculate the current carrying capacity of sized cables, and there is any formula. please send to 'than.achu@yahoo.com'

1 Answers   Blue Star,

---

As per BIS, Earth pit resistence value?

4 Answers  

---

formula for incomer breaker size calculation of powerfactor correction unit

3 Answers  

---

---

what are advantage and disadvantage of hvdc transmission . please tell us technic of hvdc technology

2 Answers  

---

hi i m going to attend bhel interview on 22nd sep 2008 for ET(electrical engineering).pls guide me how to prepare for the interview.i am a fresher.

1 Answers   Bhel,

---

do we use links in a dc circuit?if so what s its use in it?

0 Answers  

---

why field winding is placed on rotor winding not on stator winding in case of synchronous machine?

13 Answers   HAL, TATA,

---

what does kirlosker deals with?

3 Answers  

---

I NEED RRB CHENNAI (JE ELECTRICAL) QUESTION PAPER FOR LAST 5 YEAR AND I NEED RRB (JE ELECTRICAL) SYLLABUS.PLEASE SEND MY E-MAIL joo28_eee@yahoo.co.in

12 Answers   DFM, Hindustan Unilever Limited, JE, Pace, RRB,

---

At what speed 1 HP motor can run an electric car of weighing 400 kg?

0 Answers  

---