Answer / tariq

With the brushes in the G.N.A. position, there is only
cross-magnetizing effect of armature reaction. However, when
the brushes are shifted from the G.N.A. position, the
armature reaction will have both demagnetizing and cross
magnetizing effects.To neutralized the de-magnetizing
effects we add the more ampere-turns in the main windings
and foe cross magnetising effects we use compensating windings.
The second part is how it is related to electrical system?
These effects disturb our main magnetic field and ultimately
the fundamental behaviour of our DC machine. If the DC
machines are the part of electrical system then the positive
or negative effects influenced on these machine will also be
the part of electrical system, less or more.
At the extent of armature reaction only these two are else
nothing as per my knowledge.
For more details please see the following link.
http://www.circuitmaniac.com/2009/05/10/demagnetizing-and-cross-magnetizing-conductors/

if three phase supply is given to single phase transformer, what will happen?

3 Answers  

---

how we can know which is Lv side and HV side of transformer by just seeing it?

7 Answers  

---

when i am going to take trail on a 3ph sq.i/m motor 5.5kw, i observed that RPM of the motor is very low as compared to the rated RPM and also it rotates in clockwise in first ON command,and anticlock wise in second ON command. finally i observed that on phase is no available . but iam not clear about, why the motor is rotates in both directions without any phase interchanging.pls answer to my question.

1 Answers  

---

how is the testing of an REF relay? what are the test REF circuit having?

0 Answers   Siemens,

---

what is the value of current and voltage that our body can resist ?

3 Answers  

---

In aerodynamic turbines which element is NOT there a.stator b.compressor c. Fuel intake system d.fans

0 Answers  

---

How to model "to find the cube root of the given number" in Matlab Simulink ?

1 Answers  

---

How to test and satisfy the conditions of the vector group YNd1 for power transformer?

1 Answers   Areva,

---

a 650 KVA diesel generator is 1500 rpm, voltage is 415V n full load amps is 805 something,when are applied load more than 400 amps it's voltage is dropping, what is the reasons...?

4 Answers  

---

how a flip flop can be used as a latch?

0 Answers  

---

what is the reason for choosing DYn11 in transformer, why not DYn12 or something else

1 Answers  

---

when elecromagnatic waves are propogated in a wave guide?

0 Answers  

---