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.

What can you contribute to the progress of our Company as an employee if you are selected?

0 Answers  

---

If u have Powergrid model question papers Please send to below mail ID rajutheprince@gmail.com

0 Answers  

---

why a vaccum is created in condenser

13 Answers   Honda,

---

Whats parameters which we keep in mind when grounded any electrical machine.

1 Answers   Essar,

---

what is the diffrence between dol and star delta strater? why star delta starter used instead of dol?

3 Answers  

---

how many types of ct retio

3 Answers  

---

we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards

0 Answers  

---

what is feeder?

2 Answers  

---

when the direction of a 3phase induction motor is reversed , is there any losses increases?

5 Answers   IOCL,

---

When alarm is activated in buccholz relay in transformer

1 Answers  

---

What happen to generator if i have unbalanced load?

0 Answers   Reliance Energy, Sail, TCS,

---

% voltage variation in distribution a)1% b)5% c)10% d)15%

2 Answers  

---