please let me know , we have installed two separate motor for fire fighting system 1) 60 hp and 2) 15 hp the load is 74 AMPS and 20 AMPS then tell me the main power cable in Aluminum will be what thickness , the length is 225 mt from the main utility to fire pump house
We are designer please help me calculate the size of 11kv cables from step up transformer to M.V panel, total load is 5 mega watt distance 900 feet (used aluminum type cables)
please provided formula for calculate the cable with example.
I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are
1) Is it safe to use this switch with the motor I have
2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?
Is there any scope for an electrical engineer in MRF
why we need to us lenz's law for synchornous motor
is the value of inductance depends upon the evalue of
thitha in doubly excited machine?
if z transform lies in ROC then.
a)system is stable b)inverse of system is stable c)both system and its inverse are stable.
what is the difference between an alternator and a
I need to connect a synchronous generator to the grid using
automatic synchronization and two circuit breakers (one for
synchronization, one for end connection to the grid), how to
determinate the required diameter of the cables?
What are the differences between single phase and three phase?
how point on wave controller works.
How to calculate impedance volt in Transformer?
What are the function of different components of servo
If we use 250A MCCB as a incomer in Control panel for a fault level of 50kA for one second ,assuming temperature rise from 85 Deg. to 100 Deg , Then what will be the Aluminium Bus-bar size for 250A MCCB?
Explain in detail.
why we change the direction of winding in rotor ?how we make
the north and south pole?