Answer / k.prakashchandra

Stored energy = V x AH watt.hours Back up time in
hours=stored energy/load in watts.If the batteries are in
series total voltage is to be considered and if in parallel
total AH is to be considered

Answer / sathishkumar

battery backup calculations
Assumption battery bank cumulative voltage is equal to load
voltage
Q=1.25*total load current/i.e 0.8)

where the q=total capacity of the Battery Bank in Amp.hour.
and 0.8 is Battery efficiency coefficient for Lead Acid
batteries.

how 650 volts creates? where is use?

0 Answers   DCL,

---

WHAT IS THE USE OF STARTER AND CHOKE IN TUBE LIGHT?

1 Answers   Siemens,

---

what reason of line current and phase current in star connection and line current and phase current not equal in delta connection?

0 Answers   Suparco,

---

can any one tell me the formula to select the thickness of wire selection according to ampere rating

2 Answers  

---

How to test Power Transfomer vector group?

1 Answers   Bhel,

---

---

how to select the cables based on amps ratings ? how to calculate the amps and how to select the cable size

1 Answers   JV Electricals,

---

Please send specifications for 1000KVA dry type transformer or where I can get the specifications?

2 Answers   PSU,

---

when a cunductor is being disconnected from live cct, still it showing charged, if its checked by line tester?

8 Answers   GEB,

---

What should be the value of earth resistance for an instrumentation/electronic circuit? As per which IS/IEC Code?

3 Answers   IOCL,

---

what instruments used for measuring of inductance and capacitance.

2 Answers  

---

Difference between single phase rotary inverter and 3 phase rotary inverter

1 Answers   Jet Airways,

---

we all know that in transformer, voltage and current are inversely related i.e. Vp/Vs= Is/Ip....so in standard CT..we have a ratio of 200/5...that means our voltage should increase by ratio of 40..althoug that is not the case...because that requires high insulation level.and pratically not feasible......can anybody clarify my ques.......thanx

2 Answers  

---