Answer / pratik

No need of the power supply board (conventionally it is 230V rms ac).
Connect the DC supply and two 9 volts battery in Series for the Voltage to add upto 30+9+9=48.

Answer / kailash

firt of all connect these batteries
in parallel if more current require
otherwise in series now use an
electronic circuit to convert it
into ac with a step up transformer
to get 48v that can be now converted
into dc again by rectifier circuit.

How can we calculate ngr resistance for a generator and Transformer ? What type of transformer requires ngr ?

5 Answers   Welspun,

---

What safety followup during kWh meter isolation

0 Answers  

---

why the pressure coil is not present in the three phase wattmeter?

1 Answers  

---

how to calculate the torque of a motor?

0 Answers  

---

What is the power ratio between power in Star and Delta circuit?

11 Answers   ST Micro,

---

For 415v,3phase,22kw rating of motor how to calculate MCCB rating

2 Answers   Zigma Technologies,

---

What is kvar?

0 Answers  

---

Why we say three phase voltage 440v.

2 Answers   VDP,

---

How to calculate the cable size in sq. mm. when the load is given in KW?

3 Answers  

---

Why dc voltage used to excite alternator field in stead of ac?

4 Answers  

---

in our all power plant have connected in grid and grid voltage and plant voltage is same, but as per as electrical concept the power will transmit from high potential to low potential but here altough same,then how power transmit from power plant to grid.

0 Answers  

---

What are the advantage of free wheeling diode in a full wave rectifier?

0 Answers  

---