when ur using single phase type of load for a 3.5core power
cable .Why neutral is .5 and how much current in the
neutral if we consider neutral as a reverse path for three
phases.
- 2 Answers
- 4720 Views
- I also Faced
- E-Mail Answers
Answer Posted / elangovan kp
The normal balanced three phase system the neutral current
is zero as the Neutral current is equal to vector sum of
three phase currents(R,Y.B). Even the system is unbalanced
(within the tolerence)also it will not reach more than 50%
percentage of the phase current. Hence it is safe to use
50% of the conductor size as neutral. In fact for three
phase motor 3 core cable is enough to use as the load is
balanced. However in the middle east countries as per IEC
standard it is being used 4 core cable instead of 3.5 core
in India.
| Is This Answer Correct ? | 8 Yes | 0 No |
Post New Answer View All Answers
Give two basic speed control scheme of dc shunt motor?
we have a lot of model of rectifier but thyristor rectifier is the most rectifier that use in power system. Do you know why this rectifier is used?
How many types of circuit loads are there in a common electrical circuit?
What is synchro?
What is meant by bus bar protection?
How to design the NGR Resistance
why 15 kw motor winding resistance is low then 5 kw motor winding resistance?
how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com
For high frequency application we use which transformer?
Why do we need interlocking in a HT metering or Ring main unit switchgear?
What is the difference between type1 and type2 relay protection co-ordination for motor feeders
What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?
Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault
ELECTRICAL DRIVES: can a motor load system with passive load torque can have equilibrium speed in second quadrant
what is the purpose of shading ring or shading coil in electrical equipments.
