Answer / m.gopinath

SDF=Switch Disconnctor Fuse Unit

Answer / shy11am

S.D.F Stand for 'SWITCH Disconnector Fuse' Unit with
Tripple pole neutral(R,Y,B,N).

it provide more safety compare to general fuse unit.

Answer / harish shukla

S.D.F. stands for SWITCH Disconnector Fuse Unit

Answer / arif mohiuddin

SDF Stands for switch fuse disconnector.

Answer / k.p.sharma

SDF=Switch Disconnctor Fuse Unit
SFU=Switch Fuse Unit

Answer / diwana

S.D.F = SWITCH Dis-connector Fuse

in single phase we get 220 volt and in three phase 4420 v why this second Ques= in case three phase star conection our neutrul becom disconect what happan 3 Q=== a three phase house load and have unbalce load on different pahse diffrent current eg phase a 7A b 8A c 5A and voltage is 440 than how calculate it total load in kw pl give formula thanks

8 Answers  

What is the difference between MCCB & ACB Where it can be used

5 Answers  

1.generator rated as 1000 mva,11kv .8 pf what will 0.8 pf will indicate? 1.max pf it can supply 2.min pf it can supply like this 4 options there what is answer.explain

5 Answers   Power Grid,

what happenes if the core of the transformer saturates?

4 Answers  

what is the diffrence between mcb &elcb?

2 Answers   Kahramaa, Synergy,

How halogen & merquery lamp works.

0 Answers  

why frequency should be constant?

2 Answers  

What is the meaning of GRID?

21 Answers  

What is the Efficiency in Electric motor ?

2 Answers  

After synchronization with grid how to maintain the power factor in lagging or in leading? if lead of lag what is the problem?

3 Answers  

Hello friends., my question is related to testing of current transformer... A Ct having knee point voltage of 750 volts., and I have two step up transformer's of rating 230 v to 440 volts., can I obtain the value of 750 volts by using the two transformer's.... If yes then how could I connect the transformer's to obtain knee point voltage?? thank you in advance

1 Answers   ABB,

why generator and t/f ratings given in kva?

2 Answers