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
