Answer Posted / akkapelly

DG set are used mostly for companies and Domestic for
emergency only.So to start DG set batteries to be health.
To avoid starting delay Lead Acid Batteries only used
either free maintenance or Mantenanced battery.

What happens if the negative to earth voltage is greater than positive to earth voltage in the battery of substation?

1553

---

What is d main advantage of using double circuit 3 phase transmission ?

1922

---

How to calculate cable size in HT AND LT

1993

---

What happen when change order of CT in GIS feeder?

1636

---

What is the difference between isolators and electrical circuit breakers? What is bus-bar?

1134

---

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,

2208

---

Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

2127

---

how we decide scurt (disc) of insulator with respect to kv rating

3539

---

Define what is difference between fuse and breaker?

1147

---

How we calculate the size of ht cable for any transformer

2068

---

what percent do you derate your copper wire when you change from copper buss to copper wire

1971

---

how to calculate slip ring induction motor stator and rotor currents??

2251

---

why motor range is available 22kv,30kv,37kv,45kv and so on? why motor range is not available 21kv,24,25,26,27kv and so on?

2784

---

How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

1983

---

What is block diagram?

1078

---