Answer / umesh kumar

If urLoad is balanced in three Phase supply system Neural
current is Zero . neutral current is always depend on the
Unbalance load. So in Case of 3 phase system neutral wire
taken half of Main wire.
but in case of 1 phase supply system neutral is the return
cunductor and phase current will be equal to neutral curent.
so In 1 phase neural would be of same size.

Answer / imran

In three phase neautral has no current. Only at unbalanced
load there is flow of current in nutral that is why it is
half the phase size

Answer / ikab

In three phase, current in neutral in one third
of phases so conductor size is less. but in single phase neutral conductor size should be same as phase conductor size.

Answer / fred

What NEC code are you all referencing?

Suppose i Have an Ac motor of 25Hp 1500 Rpm 50 Hz Can i run a motor 2500 Rpm by AC drives by increasing a frequency either it safe or not ....

2 Answers  

---

in three phase 11kv transformer (11kv/433v) input( R,Y,B) output (X,Y,Z,N) the connection as follows 1 phase R -open 2phase y connected to both R and y of input] 3phase B- B what is the output voltage X to N ,Y to N , Z to N

2 Answers   Bescom,

---

What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?

0 Answers  

---

if 11 lead acid batteries each 200 amph are connected in series so that combinly they can produce 110 volts dc. question is how much backup it can provide ? 2) how can we calculate that how much amprere and voltage is required to charge them . thanks in advance !

1 Answers  

---

can we use IGBT as a AC-DC converting device in the applications?

2 Answers  

---

---

what is power factor

4 Answers  

---

wd do u understand by stablity of ps?

2 Answers   IOCL,

---

If OLTC is in manual position there is chance to variation of voltage(Low or High)?

1 Answers   Juniper Networks,

---

what is the use of spherical metal balls attached on to the earth wire of transmission over head lines?

2 Answers  

---

What is the full name of one of choke less lamp BLL

2 Answers  

---

diff between UPS and inverter?

2 Answers  

---

Does the Impedance of the source affects the THD

1 Answers  

---