Answer / rakesh kumar

mna refers to the axis along which the resultant flux is
0 , which coincides with the geometric neutral axis when no
armature current flows but the flow of armaue current
shifts the 0 flux position or the mna in the direction of
rotation in a generator and opposite to it in a motor ,
ideally the brushes should be along the mna as then it
would be unde the influence of no rotational emf induced
due to earlier pole once the the coil crosses the brush or
undergoes commutation , the shift of brushes has got
nothing to do with the shift of mna that is the mna should
remain at the same position , however for the sparkless
commutation mna shoild be along the brush and hence it
would be good if the mna also gets shifted by 90 .

Answer / shailesh jadon

there is no effect of shifting brushes on the mnp . the mnp
basially depends on the position of poles

Answer / vinit

i am satisfied with mr .rakesh and want to add the.shifting of
mna depends only on armature current(or load current)then how can be decided that mna has sifted by 90?

Answer / sandeep

i expect answer to 90. please justify

Answer / m raviteja

mna also shifted to 90 degrees

how to find the resistance and gap volatage of the diode??

0 Answers  

What is reverse power relay?

0 Answers  

in alternator why on load terminal voltage is less than no load teprminal voltage

1 Answers  

If any HVDC line is going with positive & negative(the negative usually have return path of current with earthing electrode). Now the question is if this HVDC earthed electrode which is using as return path and earthed any nearby 400kv or 220kv AC substation equipments. which will be the impact of this on AC substation & its equipment, how severe may be this and what should be the minimum distance require between HVDC earthed electrode and AC substation equipments? It's really an high engineering level question...Dare to answer and increase your knowledge.

0 Answers   MEIL,

how we can explain arc heatng?

0 Answers  

Pls explan the OLR setting in VCB at HT yard

0 Answers   Juniper Networks,

How much load can take a 16 mm aluminum cable 3 phase

0 Answers   L&T, Sanga Energy,

what is the pressure of vacuum circuit breaker

2 Answers  

Then what do you call a transformer that is installed on the ground?"

1 Answers  

How to calculate voltage drop in copper and aluminium cable? I have laid 240Sq.mm Aluminium cable for the length of 600 Mtrs in 1 Mtrs underground. Normal load is 150A. Transformer is 630KVA, 6.KV/433V. But, I am getting only 395 Volts when load. How to calculate voltage drop and what is the permissible voltge drop for this circuit?

1 Answers  

what is the apt definition for kirchoff's current and voltage laws?

3 Answers  

We are installing a 1.6 MVA transformer at our crusher plant and the feeder of HPSEBL is 2 km away at substaion . and a VCB is installed in the substaion which is 2 km away from transformer so we need another VCB near the transformer.

2 Answers   SCPL,