why in scott connection of transformers, main transformer is tapped at 50% and teaser transformer at 86.6%?

5 Answers   Bhel, Bosch, College School Exams Tests, Wipro,

---

While performing load test on DC SERIES MOTOR, does the voltage decrease slightly. Why?

2 Answers  

---

what we happen if 400 kvar cpacitor banks are on in manual mode and there is no load on mains ??????????????

7 Answers   HCL, Reliance,

---

In EB metering we face problem kva jump even in no load condition.can any one help to control this

0 Answers  

---

How to check the specific gravity of the two 12 V batteries connected in series to a 24 V UPS and inverter ? will we have to disconnect all the connections and turn off the UPS and inverter or not ? will we have to check specific gravities in each cell of the two batteries ? what is the name of the instrument that is used to check the specific gravity and whats the procedure to check the specific gravity with it ? thanks

2 Answers  

---

How do you select a cable size(Cu & Al) for a particular load?

2 Answers  

---

what is the difference between E.L.C.B & R.C.C.B?

2 Answers  

---

what is the difference between directional & non directional earth fault with example please explain.

0 Answers  

---

our plant maximum demand has 500 kva.need to suggest me to maintained pf 0.98.how much capacitor bank will be connect to the supply line.

1 Answers  

---

we have 3 phase 4 wire supply 230/415 V.AC and our distribution is single phase or we have all single phase 220 v,ac operated appliances. and noted the current with help of clamp meter Red to N = 20 Amps. Yellow to N = 45Amps and Blue to N = 30 Amps ( total is 95 Amps ) what will be neutral current on the main .

1 Answers   ABC,

---

star delta starter contorl circuit... drawing..

0 Answers  

---

difference between microprocesser and microcontroler

1 Answers   HAL,

---