0
Why zero sequence current cannot flow through a star connected machine unless the neutral is grounded?
Piya
If the neutral point is not earthed than the zero sequence current will not have any return path.It will be an open circuit for the zero sequence circuit.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Definition of ac machine?
A machine that runs on an alternating current.
How can the field coils of a dc machine be connected with self excitation?
No
What is negative phase current?
Negative Phase Sequence is Phenomena generally found in motors,the formula for positive phase sequence is : Ip= Ir + a * Iy + a^2*Ibthe formula for negative phase sequence is : In= Ir + a ^2* Iy + a*IbAs the name suggest the sequence of current or the mmf is in reverse order, a reverse order current in stator will produce a reverse order mmf, now this reverse order mmf is rotating in direction opposite to the rotor of the motor, thus the mmf cut is very high and so current induced in stator is considerably high; as for normal mmf it is in direction of rotor so mmf cut is very small thus current induced is very small.this high current in your rotor leads to overheating of your motor and finally burning of your windings.CommentNegative phase sequence is not 'generally found in motors'. But one of the effects of negative phase sequence would be to cause a three-phase motor to reverse direction.
What component of a welding machine changes AC current to DC current?
Yes, it is normal for a welding machine to convert AC voltage to a DC voltage.
Who is George Mealy?
George H. Mealy presented the concept of a finite-state machine that became known as the Mealy machine in a 1955 paper, "A Method for Synthesizing Sequential Circuits." This machine differs from a Moore machine in that rather than the outputs being defined by the current state, the outputs are defined by both the current state and the current inputs.
What is alternating current machine?
"What is alternating current machine?"
Definition of ac machine?
A machine that runs on an alternating current.
Can I print wirelessly to a fax machine?
You must have a fax machine that has Wifi capabilities,and have it connected to your network.
What is the current of a G5 massage machine?
I think it is an alternating current :)
What is a large wheel connected to a smaller wheel?
A large wheel connected to a smaller wheel is a simple machine.
The language that the CPU understands consisting of a sequence of bits is called?
machine language
What type of machine is connected to a shaft of a wheel and Axle?
Lever a+
How can the field coils of a dc machine be connected with self excitation?
No
Why armature core is laminated in dc machine?
to reduce the eddy current loss in the machine
Why would the meter show 5 volts when the main leads to the machinery aren't connected?
There is probably a capacitor in the machine which holds a certain amount of electricity for helping deliver an amount of current at start-up.
Why the dialysis machine is connected to artery not the vein?
because it is the other way round...it is connected to the veinrather than the artery.
Machine's service manual states that it must be properly grounded this means you should make sure that the?
A machine's service manual states that it must be properly grounded. This means you should make sure that the:machine is on a level surface.machine is bolted to the floor.machine's parts are properly assembled and attached.machine's cord is plugged into a three-hole electrical outlet.
