Answer / m tashfeen abbasi

UPS calculate in watt and battery calculate in AH(ampere hour)

Answer / aamirali

we can use this formula: Max Amp= (KVA rating)/ (kv*1.73)
for three phase supply.

who is ohm's and his law ?

1 Answers  

---

how can we run the induction motor at 9000 rpm ,by keeping frequency constant??

2 Answers  

---

What is an iron loss or core loss pi?

0 Answers  

---

what is vcb & working principal

4 Answers   JLL,

---

what happend if the protection ct is by mistake put instead of measuring ct & vice versa?

2 Answers  

---

How to identify phases in the transformer like motor and AC generator but one condition without phase indication like(RYB,UVW)?

1 Answers  

---

What is class X ct? What rare its uses?

2 Answers  

---

why +24 v and -48 v give to BTS? If -48v protect from surge then why we not use -24 v?

0 Answers  

---

If a shunt Dynamo has induced emf 100V and 0.4 ohm resistance and battery of accumulator of open circuit emf 110V and 0.5 Ohm resistance are in parallel what is common terminal potential difference?

0 Answers  

---

Can without battery on line UPS,off line UPS or Invertor works please brief.

5 Answers  

---

How to calculate the phase to phase clearness of HT /// LT bus bar?????

0 Answers  

---

What is effect on in zone and out zone fault if CT chosen for phase side is Vk/2<5mA and Neutral side is Vk/2<15mA on REF protection of Transformer

0 Answers   ABB,

---