Answer / suresh raajaa

SWITCH FUSE UNIT. IT IS USED FOR PROTECTING POWER AND
CONTROL CIRCUIT DEPENDS ON THE CURRENT RATING REQUIRED.

Answer / rajan

It is Switched Fuse Unit. It has one switch unit and one
fuse unit. When we operate the breaker, the contacts will
get close through switch and then the supply will passes
through the fuse unit to the output.

Whereas in Fuse Switch Unit there is no separte switch and
fuse unit. There is only fuse unit which act itself as a
switch. When we operate the fuse unit will close the input
and output of the breaker.

Answer / vinod

switch fuse unit.there are many protective systems like
HRC,MCCB,MCB...

Answer / karthik

SFU(SWITCH FUSE UNIT)-IT HAS BEEN USED TO TRIP THE
CIRCUIT,PARTICULARLY THIS IS USED FOR HIGH CAPACITY TRIPPING
. WHEREAS MCB&MCCB ARE USED FOR LOW CAPACITY TRIPPING

Answer / ayman

Switch Fuse Unit . It is made of power fuse (80,250,400A)
and switch which can be operated from outside using extend
rotary handle to rotate the shaft which is inside it .

Answer / senindra123

SFU-switch fuse unit. its a fuse unit which can be connet
and disconnect manually with power using a handle.

Answer / sunil kumar rout

sfu -switch fuse unit
it has combination of hrc fuse and a switch unit with different ratting.
when any short ckt hrc fuse is blown and its control ckt and power contactor trip with help of bmr,earth fault relay,ct operated relay,or any type of digital rlay. but in some cases switch unit not trip
it is a old model.
now a days mccb used.

Answer / akhand sharma

Switch fuse unit is a complet unit of controling the power in PCC and MCC panel.. this type of switch using the one of the bigest reson is safety when we work on ground level we can logout or tagout with this switch easily to work...in this unit not only switch it become some of no switch is also connect to control the PCC and MCC panel....at working time......

Answer / vinay

SFU (SWITCH FUSE UNIT) IS USED AS A BASE FOR FUSES IN WHICH
FUSES ARE FIXED IN ELECTRICAL PANELS.

Answer / d r nagar

It is used to protect electrical or electronic devices and
control circuit depending on the current rating.

in dc series motor if field wdg is shorted then

0 Answers  

what is principle in relay testing kit?

3 Answers  

How to work to the x'mer as a induction motor?

1 Answers  

DG cranking voltage?

0 Answers  

what is a diffrence between MCCB, RCCB, MCB, & ELCB ? what is rated current e.g. on motor name plate indicated that is rated curent? what is full load current? If we run D.C. motor with mechanical coupling and we measure voltage on terminal it shows voltage or not ? same in AC also possible ?

5 Answers   Reliance,

please tell me, how i clear the objective test? when i studied form the one book after i solved the objective ,that time i solved that qes. but if i tried solve objective form the other book then i could not solved these que.

0 Answers  

sometimes, eventhough the HV side of the transformer is opened there is a voltage in LV side .How is it possible?

4 Answers  

how to calculate the Neutral transformer impedance?

0 Answers   Schneider,

sir, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to eee_dharmendra@yahoo.com

0 Answers  

What are the commonly used schemes for the bus zone protection?

0 Answers  

In a 3 phase system a neutral exists so that any unbalanced currents can flow through it towards earth.... but a phase demands a particular current as per the load attached to it....then where does the extra current come from the goes in the neutral??....I mean in an unbalanced system a phase demands a current as per its load attached....then where does the unbalanced current come from??

1 Answers  

In induction machine when the load increase the current will increase .why? what is the relation ship between the sleep and current drown by stater?

1 Answers