Answer / k.prakashchandra

2 KVA UPS, 8 batteries of 38 AH and 12 V and load 600W. The
back up time = 8 x 38 x 12 /600 = 6 Hour (app)

Answer / kalpesh m. shah

2 KVA UPS, 8 batteries of 38 AH and 12 V and load 600W. The
back up time = 8 x 38 x 12 /600 = 6 Hour (app)
In single phase output voltage is 230V AC so you can
considerd back up time is = ( 8 Batteries X 38 Ah X 12
Volts / 2.6A Load X 230 V Output )X 60% backup = 3.66 Hour
Successfully working.
In Single phase W = V X I
Watt = 600
Voltage = 230
So, Current is 2.6A.

A distribution transformer giving afrequency of 200HZ, where it is rated for 50HZ. when it will occure?

2 Answers  

---

any idea abt REVERSE METERING concept.........?

0 Answers  

---

what is the mho relay

3 Answers  

---

i applied for c licence with my one year apperents trainee and i have attaced with A grade contractor company experiance that is for 14 monts experiance this document is sufeicant for c licence? pls tell why they rejected

0 Answers   TNEB Tamil Nadu Electricity Board,

---

what are smoke detectors ?

4 Answers   Indian Military Services,

---

---

how the aircraft outer body and inner body is separated ?

0 Answers  

---

Hp to Kw and Kw to I(amps) conversion......

3 Answers  

---

why do we earth the tandelta point of a power transformer bushing?

1 Answers  

---

what will happen if field winding supply of synch generator accidently got disconnected?

4 Answers  

---

What facility we get after CT secondary earthing and how?

0 Answers   Reliance,

---

In EHV tranm. The conductors are …….. a) Cu roads b) Cu bars with Si c) Cu tube with Si plate

2 Answers   Engineers India Limited,

---

What are the advantages of using distance protection schemes as opposed to normal overcurrent/ earth fault protection on high voltage feeders.

0 Answers   Eskom,

---