Rectifier System Output: –48V / 15A & –48V / 30A
Why –48V DC Rectifier is used in ISP & Telecom
–48V DC is the global telecom standard because:
→ Power loss is very low over long DC cables → Safer than AC power for equipment rooms → Provides stable power for 24×7 operation → Easy to connect with battery backup systems → Used in telecom networks for more than 100 years
Most telecom devices operate within –36V to –72V DC
What does a Rectifier System do?
→ Converts 220V AC into –48V DC → Supplies power to live telecom equipment → Charges backup batteries continuously → Shifts to battery power automatically during outages
Result: No shutdown No manual switching Continuous network service
Difference Between 48V / 15A and 48V / 30A
–48V / 15A Rectifier (Approx. 720W)
Suitable for small installations
Used in: → Small ISP POP → Mini OLT room → CCTV and access switches
Why 15A is enough: → Low power consumption → Cost-effective solution → Smaller battery bank required
–48V / 30A Rectifier (Approx. 1440W)
Suitable for medium to large installations
Used in: → ISP core POP → GPON / XGSPON OLT rooms → Mobile tower and transmission sites
Why 30A is preferred: → Handles heavy power load → Provides longer battery backup → Supports future network expansion
