In case of 3 phase motor why it is called single phasing by failure of one phare

In case of 3 phase motor why it is called single phasing by failure of one phare unless there is rest two phase are acting. ?

Question Posted / guest

3 Answers
4632 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

In case of 3 phase motor why it is called single phasing by failure of one phare unless there is res..

Answer / satya dev

Basically 3 Lines are connected to the motor for operation
that is known as Line1, Line2 and Line-3 or L1, L2 and
L3.and the voltage between L1-L2, L2-L3 and L3-L1 are
called Phases. During the single phasing actualy one Line
has failed so two phases will be down and one phase will be
acting thast why it is called single phasing. single
phasing means one line failed and it will resulted two
phase dead only one phase can active.

Is This Answer Correct ?

4 Yes

2 No

In case of 3 phase motor why it is called single phasing by failure of one phare unless there is res..

Answer / k.prakashchandra

When one phase is missing ,the other two phases form one
phase of line voltage as neutral is not connected .If two
phases are absent as there is no return path, the condition
is zero phasing

Is This Answer Correct ?

2 Yes

0 No

In case of 3 phase motor why it is called single phasing by failure of one phare unless there is res..

Answer / guest

I woukd like to ask above question.

Is This Answer Correct ?

1 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

Can anybody tell the formula to calculate temparature rise in the cable with respect to current?

1 Answers

How can I calculate per unit (KWH) fuel (Gas/ Diesel both) consumption 1MW unit?

0 Answers

Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?

0 Answers

When a capcitor is used on 440 v thenthis is kvar rating 25kvar .my question is that when we use this capcitor use 480 v &525 volt .how much kvar increase . Plz give my question ans. And give answer with formula .my mail id is rohitashsaini013@gmail.com

1 Answers Neptune,

what is the difference b/w single and three phase circuits?

1 Answers

TO operate transformers in parallel, vector symbol of the both should be same.If one transformer name plate is not there, how can we conclude that whether the transformer is having the same vector symbol or not?

4 Answers

What is the difference between Static and servo controlled voltage stablizer?

0 Answers Voltamp,

What is difference between dc three point starter and dc four point starter?

3 Answers Chettinad,

battery dis charge condition long time condtion?

1 Answers

Is there is any difference between AC and DC Cables

1 Answers

How do we measure earth fault current in Generator Transformer(20/420kv),Station Transformer(20/11 kv) and Unit Transformers(20/11kv) for our plant system, since these don't have any Neutral earth Fault relay connected to their Neutral Earth? But for Unit Service transformers(11/.433 Kv) we have an Earth Fault Relay connected to its neutral earth.Why is such so?

1 Answers NTPC,

What is the role of Dedicated earthing in UPS System?

0 Answers HCL, MSPL,

For more Electrical Engineering Interview Questions Click Here