ET48300005 5U 18kW 48V 300A DC Telecom Power System with Six 3kW Rectifiers and Front Service Distribution

 
 
The ET48300-005 is a 5U rack-mounted DC telecom power system developed for communication sites that need dependable -48V power, organized load distribution and battery backup in a compact cabinet space. It is positioned as an 18kW / 300A class solution, using six 3kW rectifier modules to provide stable DC output for transmission equipment, access devices, switches and base-station loads.
 
This model is suitable for sites using 220VAC single-phase input, making it easier to deploy in equipment rooms or access network cabinets where three-phase power is not available. The system integrates AC input protection, AC surge protection, rectification, battery breakers, LLVD/BLVD load outputs, DC SPD, LCD monitoring and communication terminals into one front-service platform. The front panel layout allows technicians to check breaker status, controller alarms and wiring terminals without removing the system from the rack.

Product Features 18kW 48V 300A DC Telecom Power System

18kW modular capacity: Six 3kW rectifiers support flexible configuration and online maintenance.

300A DC output class: Suitable for medium to high-load telecom power distribution.

Single-phase AC input: Designed for 220VAC sites with 1 × 100A/2P input protection.

Clear load separation: LLVD and BLVD branches help divide priority and non-priority equipment.

Battery protection: Two 125A battery breakers support backup battery connection and isolation.

Surge protection: Integrated AC SPD and DC SPD improve system resistance to transient overvoltage.

Remote monitoring support: LCD controller with RS485, SNMP, dry contacts, AI/DI signal inputs.

Front maintenance design: Rectifier and controller are hot-pluggable for faster field replacement.

Application Scenarios 18kW 48V 300A DC Telecom Power System

 
The ET48300-005 is suitable for wireless base stations, transmission networks, fiber access sites, enterprise communication rooms, microwave stations, telecom cabinets and backup DC power systems requiring stable -48V distribution with battery management.
 

Technical Parameters 18kW 48V 300A DC Telecom Power System

Model: ET48300-005

Type: 3–18kW 5U Subrack

Maximum Current: 300A

Dimensions: 482.0(W) × 350.6(D) × 5U(H)

Weight: ≤22kg without rectifiers

Installation: 19-inch rack or cabinet

Cabling: Top inlet and top outlet

Protection Level: IP20

AC Input: 220VAC single phase

Input Capacity: 1 × 100A/2P

Frequency: 45–65Hz, rated 50/60Hz

AC SPD: 20kA/40kA, 8/20μs

DC Output: -43V to -58VDC, rated -53.5VDC

Maximum Capacity: 18kW, 6 × 3kW

Battery Breakers: 2 × 125A/1P

LLVD: 2 × 32A/1P + 2 × 40A/1P + 3 × 63A/1P

BLVD: 2 × 6A/1P + 2 × 10A/1P + 2 × 16A/1P

DC SPD: 10kA/20kA, 8/20μs

Rectifier Efficiency: >96%

Power Factor: ≥0.99

Operating Temperature: -40°C to +75°C

Humidity: 5%–95%, non-condensing

Altitude: 0–4000m