Answer Posted / subash nishad

take line voltage is VL and Zs is the impedence of
each phase,
then in case of delta connection ,VP=VL

phase current I(delta)= VL/Zs

we know that in delta connection ,
Line current IL= root 3 times phase
current
so line current I(delta)=root3*VL/Zs
in case of star connection,Vp= VL/root3
phase current I(star)= VL/root3*Zs
weknow that in star connection,
phase current=line current
IL(star)=VL/root3*Zs

so, IL(delta)/IL(star)= root3*VL VL
---------- / ----------
Zs root3*Zs


= root3 *VL root3*Zs
--------- * ----------
Zs VL

= 3

IL(delta) =3*IL(star)

hence, delta connection will take 3 times more current
than star connection..

all details of DG UPS HVAC

2086

---

List examples of voltage source?

1050

---

8. A DYNAMOMETER TYPE WATTMETER RESPONDS TO THE.......

9301

---

According to underground cables a) stress b/w sheath & conductor is high b) inrush of core & conductor

1978

---

Explain Continuous and Discrete signals?

1751

---

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1996

---

How halogen & merquery lamp works.

2172

---

what happens if earth of 33kv cable is not connected to earthing pits? please send this query's answer to ngrm.sudha249@gmail.com

2042

---

Please define ampere?

1130

---

explain single phase series motor

1951

---

how can we design robots

1956

---

How to decide the size of the capacitor for a single phase induction motor say 2 HP ??

2243

---

What will happen if a dc source is given to a tubelight. Will it work or wont it work....

1990

---

i've iocl interview.. if you know the interview process please give me information..

2021

---

how to calculate magnetic force genrated by a coil ?

2208

---