Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / trevor
While all the above are correct
1 HP = 0.746 KW
Horsepower is a north american standard for specifying
motors. KW is the European standard.
Low Voltage motors listed in KW will normally have 3
phase / 50 Hertz as there power supply.
Low Voltage motors listed in Horsepower will normally have
3 phase / 60 hertz as the power supply.
Unless the Engineers are mixing standards when specifying
the motor.
It should be noted that the frequency of the supply power
will affect the RPMs of the motor. In north america 3/60
power the normal nominal RPMS are 3600, 1800, 1200, 900,
while in Europe (3/50) the normal nominal RPMS are 3000,
1500, 1000, 750.
Thanks
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
Actually I have a doubt on neutral and earth.we use Ac power without taking neutral by connecting to earth,but at that time does it affects on efficiency of any electrical components or no? If yes how?
what is electrical machines
How to perform a DC resistance test In Alternator and their proceduces?
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
What is the difference between resistance grounding system and resistance earthing system?
Whether it is possible to measure energy at the input of rectifier transformer (12 pulse with very high odd harmonics)
how freewheeling diode improves the powerfactor
What is meant by a stray loss of a induction motor??? What is the equation to find it
If two Transformers are connected in parallel having impedance of 50KA in both transformers will the impedance increase or decrease after connecting transformers in parallel?
What is the gross weight to copper ratio in slip ring induction motor of 4000 HP,6.6 kv, 372amp, 992 rpm GE motor.
When lag/lead/lag-lead compensation is employed?
We have 90mX100m hangar with 16 no.of supporting pillar. It is required to provide power supply on all pillars. what is suggested earthing scheme for hangars.
How many types of electric motors are there?
how choose conductor&depending upon load
