Interested to Buy Any Domain ? << Click Here >> for more details...
How you calculating the current for a 2.5 Sqmm cable.
A 30 Hp 3 phase AC motor of power what size of cable is
used for this motor.
- 7 Answers
- 24282 Views
- Siemens, I also Faced
- E-Mail Answers
Answer Posted / shashank
deciding a cable has to consider following parameters also,
1. Safety factor of the cable (margin for starting current
say 1.25 in numerator side)
2. Deterioration / Degradation factor (say 0.8 in
denominator)
calculate the current of the motor by considering running
pf (power factor) say 0.8
as motor gives real power
e.g.
W = V * I Cos (phi)
30*746 = 415 * I * 0.8
I = 30 * 746 / (415*0.8)
I = 67.41 Amp,
Thus Current considered for cable (Icb) = 67.41*1.25/0.8
Icb = 105.3 Amps.
Select from the catalogue suitable copper cable for this
motor. Dont forget to consider the voltage drop per meter,
the total voltage drop shall not be more that + - 5%.
| Is This Answer Correct ? | 15 Yes | 9 No |
Post New Answer View All Answers
Explain the following and how these are working with PLC Unit 1 I/O Module Card 2 Adaptor Card 3 Ribbon Adaptor 4 I/O bus 5 I/O Devices
Why back emf used for a dc motor? Highlight its significance.
Briefly describe means used by electricity suppliers to influence the flow of active and reactive power in power networks (one for each type)?
What is method of calculating the fault current for a MDB, 50KW, 3PH, 415V, 50HZ?
what is your aim
please send the IS strandard for electrical to sakthi_murugan86@yahoo.co.in
Connection diagram for KW meter and Kva meter
how calculate the electrical load for industry and office
Give details on how you intend to handle a challenging position you are posted to manage unexpectedly as a company staff?
a 100mva,400/200v transformer has leakage impdce of 10% draws a steady state line currentof---------------
Please sent me some previous year question papers of BSNL-JTO telecom and RRB in ELectrical Engineering to varshashahi@yahoo.com
Why auxiliary transformers are not connected in parallel in primary stations?
List examples of voltage source?
Why an ac systems are preferred over dc systems?
what is lrs tank water resistance.
