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.

bsec exam syllabus (mis)

0 Answers  

---

what is the condition for YnD11

0 Answers   Bhel,

---

Why indian power system in 11kv,22kv,33kv,66kv,110kv,220kv ? 2) Why ups required dedicated earth?

8 Answers   Energia, L&T, Sail,

---

Dear sir please mera ye sawaal hai ki rccb ka kya kaam hota hai please answer hindi me dizyega dhanyya waad

1 Answers  

---

why we are using the 2 slope in differential relay?but in busbar differential we are using only one slope. what is the reason.

1 Answers  

---

for 4 MVA , 33K.V/6.6K.V transformer. secondary side the connected load is 3000H.P. What is the rating of capacitor bank to be insttaled.

0 Answers   SCCL,

---

what is meant by generator differencial protection?

1 Answers  

---

What is the latest generation of circuit breakers called?

2 Answers   Focus, Oil India,

---

How to calculate the size of cables (all minium/copper) for a particular load

1 Answers   BSL, Galaxy Power System,

---

Can I use 1 phase power supply to run 3 phase motor? If yes, how?

6 Answers  

---

Name quantities which are not transformed in the tranformer.

3 Answers  

---

Why the output of OP-AMP is always less than Vcc?

0 Answers  

---