how one can know the charging time, discharging time of a 12 VDC battery ? If i have a battery of 12 VDC , 4.0 AH , how long will it take to charge from a charger (power supply) of input 220 V , Output 15 V and output current of 3000 mA and how long will it take to discharge whether using or not ? How much backup will it give ?
1 3298why middle phase should used for earth fault and other phases used for over current in overcurrent and earth fault relay?
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Guys! I coplted 10th with 80% and +2 with 64% now am dng c.s.e b.tech...i want to go abroad for higher studies i want to write tofel...plZ GIVE UR SUGGESTIONS!
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