It was originally supplied by a large bank of lead-acid batteries, 24 cells in series gave 48V.
To protect the euipement from Lightning/ Thundering: All telecom electronics works on "-" Vdc supply, because thundering clouds close to ground always charge with "-" polarity. Clouds with this charge always needs "+" to discharge this charge. so to avoide this discharging (which leads to damage the all eauipements) all quipement is supplied with the -Vdc supply.
12 Vdc
-24 vdc
To increase a 4.5 VAC supply to 5.5 VAC, use a transformer. To increase a 4.5 VDC supply to 5.5 VDC, you'd need a boost converter.
A 12 volt battery supply a 12 VDC potential to a 12 VDC load.
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A 10-20 vdc power source is a low output power supply used for small devices like battery chargers, notebook computers, and appliances. They use AC power input to convert it into DC power.
The coil will burn out due to having almost double the voltage being applied to it.
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Shova VDC's population is 7,279.
Converting 48 vdc to - 48 vdc is very easy. Just change the terminals. Instead of the positive terminal, connect the wire to the negative terminal.
SHANKARNAGAR VDC of Rudendehi