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How are start windings placed with the run windings?
yes
Why would you megaohm a motor?
To determine whether there are any electrical shorts among windings, or from windings to case ground.
What is constructional differences and features single and three phase transformer?
The major difference is that the core, usually having three limbs if it is a 'core-type' core (or five, for a 'shell-type' core), must accommodate six windings: three primary phase windings and three secondary phase windings. Some three-phase transformers may have additional windings ('tertiary windings', for example) for various other purposes.
When working on a current transformer the secondary windings must be?
When working on a current transformer the secondary windings must be shorted. <<>> Properly loaded
What are types of windings in low voltag windings?
to achieve high voltage Wave type winding is used...... For high current Lap winding is used.
What is an amortisseur winding?
An amortisseur winding is a squirrel cage winding placed near the surface of the pole faces of a synchronous motor.
If an alternator is being driven by a gasoline engine how is the speed of the alternator's rotor controlled?
by an amortisseur coil
The windings of an AC motor are called?
Windings
How are start windings placed with the run windings?
yes
What are the types of winds?
Local wind and Global wind
What is the three phase transformer?
it has three primary windings & three secondary windings.
What is the difference between lap windings and wave windings?
Lap windings has four current paths, the same as the number of the field poles, while the Wave windings has only two paths, regardless of the number of poles. Lap windings are also used for applications requiring lower voltages at higher currents, while Wave windings are used for applications requiring higher voltages at lower currents
What are start and run windings of a motor?
Start winding determines the direction of rotation. Start windings are considered "secondary windings" and run windings "primary". Usually, the start windings disconnect from the power circuit and dry film capacitor(s) at about 75% of the motors full speed. There are some motors with oil filled capacitors that keep the secondary "start" windings in the power circuit but only disconnect the dry film caps. The primary "run" windings are always in the power circuit. There are more, could write a couple of pages on the whole workings.
High voltage field windings are connected series or parallel?
high voltage field windings are connected in parallel
Does armature rotates?
Typically the armature windings are in the stator of a generator, which does not rotate. Typically the field windings are on the rotor, which rotates.
What is interpole winding in DC machine?
For a D.C motor it is the field windings which must always be in series with the armature windings.
Why would you megaohm a motor?
To determine whether there are any electrical shorts among windings, or from windings to case ground.
