Interested to Buy Any Domain ? << Click Here >> for more details...
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
- 12198 Views
- I also Faced
- E-Mail Answers
Answer Posted / deepakindi1
1)In single phase u measure Voltage wrt neutral ie Phase to
neutral(VN)which is phase voltage,
#In three phase if u measure voltage b/w two line terminals
ie b/w R-y or Y-B or R-B it vl b 440v even in three phase
supply if u measure voltage b/w any phase and neutral point
it vl b 220.(Vph=VL/(square Root of 3).
2)A break in the neutral conductor can however result in
wide rise of the voltages between
each phase and the star point if the three single phase
load currents deviate from the ideal
balanced condition. Depending on the degree of unbalance
between the single phase loads, in
the extreme, the three single phase voltages (phase to
neutral) could vary from as low as zero
volts, to any voltage up to the phase to phase voltage.
Irrespective of load balance, the voltages
between phases are not affected by a break in the neutral
conductor.
3) VR*IR*cos(@)+Vy*Iy*cos(@)+Vb*Ib*cos(@)
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
why booster transformer is used in sumpners test conducted on transformer????
What is the differentional relay...what is the work of this in power Tx. how it is works..
write circuit diagram for a motor rotate in forward direction once it started and when pressed the same button it should rotate in anticlockwise.
what is auto re-closer?
What is the principle of HIGH SPEED DIRECT DRIVE MOTOR ?
Define phase lag and phase lead?
If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?
I want formula to calculate cable size as per load given in length & amp. I searched many sites but didn't right answer. Please reply me asap.
Why efficiency in thermal power plant is low?
What are the advantages of a three-phase system over a single-phase system?
If I bring a basic electric meter from the States and hook it up in Costa Rica in a development that has only one transformer for the 50 homes, will it still be accurate regarding the usage of kilowatt hours?
What is the difference between Generator Differential Relay and Transformer Differential Relay?
is IS says that neutral should be brought to switch box. and this one is a recomended practice
what is the function and use of cable differential protection relay?
I want definition for ABT Meter (Availability Based tariff) ?
