Answer / solanki

EXCITATION VOLTAGE-
IT CAN BE EXPLAIN AS THE VOLTAGE REQUIRE TO EXCITE THE FIELD
WINDING OF A DC MACHINE NORMALLY ITS VALUE LIES BETWEEN 125
TO 250 V DC.
EXCITATION CURRENT-
THIS IS THE CURRENT WHICH REQUIRE TO EXCITE THE DC MACHINE
FOR PRODUCING MAGNETIC FIELD....

Answer / engineering.force

Excitation voltage is the voltage across the field terminals
of the dc machine, i.e. to energise the field winding of the
alternator or dc machine. Its value is generally 125-250 V
and it is supplied by a dc generator (in case of alternator)

Excitation current is the magnitude of the current that is
required to produce the required magnetic flux in the
airgap. i.e. the value of the field winding current at a
particular load (or may be rated load) is known as
excitation current.

Excitation voltage is required to supply for the reactive
power demand of the system.

can we measure +,-.zero sequence current ....? if so how can ???

2 Answers   NLC,

---

i need the curve duty cycle and amper for (150 kva @50% dyty cycle) transformer turn ratio :19 and vin 400

0 Answers  

---

how does a liquid starter reduce the starting currents?

0 Answers  

---

What is the problem if we connect a weak capacitor to the system? is that profitable or Loss?

1 Answers  

---

How many different speeds can be obtained in cascade control of two induction motors?

1 Answers  

---

why we have and use 3 phase not 2 or 4 or other in power system?

0 Answers  

---

what are d/f between cfl and pl lamps,

1 Answers  

---

Write the formula for Fault MVA, Fault current, Base MVA.

2 Answers  

---

Why the ceiling fan rotate in anticlock wise direction whereas tables fan rotates at clock wise direction?

3 Answers  

---

An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor frequency at maximum torque point is A 3.33% B 4.44% C 5.55% D 6.66%

1 Answers  

---

I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??

0 Answers   Elmaco,

---

What happen if two protection core (3p) of VT in LAVT are 11kv/root3, 110v/root3 and one protection core (3p) is 11kv/root3, 110v/3

1 Answers  

---