Answer / ravindhar

bcoz in star connection phase voltage is 0.57times the line
voltage. so that the insulation required is less. but in
the case of delta connection phase voltage is equal to the
line voltage. the insulation required is more.so the cost
of the equipment is also more.

Answer / pandi

in star connection phase voltage is 0.57times the line
voltage. so that the insulation required is less. but in
the case of delta connection phase voltage is equal to the
line voltage.main concern is starting voltage in case of
delta if the starting voltage is more then starting current
also more compare then star so we r using star connection

Answer / biswaindu parida

In Ht motor Harmonics of 5th,7th and above order are created. To provide a path for the this unbalanced currents Star connection is made so that those currents will flow through the neutral of the star connection. which is not possible in delta connections.

I want to design a heating coil of 80/20 nicrome for 3.5KW please give me the calculations choosing for physical dimensions assume coil voltage will be 110V AC assume necessary conditions

0 Answers  

---

How amny AH battery required for 600va inverter ?And how many hours it will give backup for ceiling fan ?

3 Answers   HCL,

---

if the power factor is .88 i want to increase the power factor to .99 what number of capacitor is to add?

3 Answers   Amway,

---

can we load Power capicitors on DG sets?

14 Answers   Neptune, Nimbus, Westin,

---

what is function and advantage of double delta winding in induction generator?

1 Answers  

---

---

Electrical Engineering

0 Answers   Gamesa, Medha Servo,

---

define power quality

1 Answers  

---

234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

0 Answers   Jomel,

---

Define motor & pump?

3 Answers  

---

What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection

0 Answers   ABB,

---

1. What is maximum permissible distance between smoke detectors ? 2. How do we decide number of smoke detectors required in a large office, warehouse, hall etc ? 3. What should be maximum height of smoke detectors ? 4. Where do we use heat detector, optical smoke detector, temperature sensitive detector ?

0 Answers  

---

Induction generator has = A negative speed B negative slip C negative voltage D negative current

2 Answers  

---