Telecom DC48V Rectifier Power System Featuring Advanced Remote Management

Product Overview

The ET48750-M7E1010 DC rack power system provides a high-capacity, resilient DC power solution designed specifically for telecommunications infrastructure, data center operations, and industrial applications requiring dependable DC power distribution. It accepts 380VAC three-phase input and delivers a stable DC output adjustable between –43VDC to –58VDC, with a nominal operating point of –53.5VDC. Offering a maximum output capacity of 30kW, this system reliably supports high-demand installations while achieving power conversion efficiency exceeding 96%.

Featuring a modular and redundant design, the system supports up to 10*3000W rectifier modules configured for N+1 redundancy, with each compact module weighing under 2kg. The rectifiers utilize forced-air cooling, achieve a near-unity power factor (≥0.99), and maintain low total harmonic distortion (THDi ≤5%) for efficient and clean power conversion. With front-access maintenance, top-panel cabling, and IP20 ingress protection, the 10U rack-mountable chassis emphasizes operational safety, ease of service, and straightforward integration into standard 19-inch cabinets.

The DC distribution panel is equipped with 2*250A/2P battery circuit fuse and includes 2 LLVD and a BLVD functionality for secure and flexible power management. System intelligence is provided by a dedicated controller featuring 3 analog sensor inputs, 7 digital status inputs, and 6 configurable dry-contact alarm relays. Remote monitoring and management are enabled via RS232/485 and SNMP interfaces, while an integrated LCD display allows for local status viewing and configuration.

Engineered to perform in demanding conditions, the system operates across an extended temperature range from –40℃ to +65℃, tolerates relative humidity from 5% to 95% (non-condensing), and maintains full performance at altitudes up to 3000 meters. Combining a scalable modular architecture with proven reliability, this 30kW DC power system stands as a robust and scalable energy solution for critical infrastructure where power availability is paramount.

System

• Dimension: 482.0(W) × 350.0(D) × 10U(H)

• Weight: ≤35kg (without rectifiers)

• Cooling mode: Natural cooling

• Installation mode: Installed on 19-inch rack or inside the cabinet

• Cabling mode: Top inlet and top outlet

• Maintenance mode: Front maintenance, support module grade change

• Protection level: IP20

AC Distribution

• Input mode: 380VAC three-phase, 125A/4P

• Input frequency: 45–66Hz, rated value: 50Hz/60Hz

• AC SPD: 20kA/40kA, 8/20μs

DC Distribution

• Output voltage: –43 ~ –58VDC, rated value: –53.5VDC

• Maximum capacity:30kW(10*3kw, N+1 redundancy)

• Battery breakers: 2*250A/2P fuse

• Load breakers: 

• LLVD1: 2*63A/1P+3*100A/1P;

• LLVD2: 2*63A/1P+3*100A/1P

• BLVD: 2*100A/1P

• DC SPD: 10kA/20kA, 8/20μs

Rectifier

• Input voltage: 85VAC ~ 300VAC, rated 220VAC

• Efficiency: >96%

• Rated power: 3000W (176–300VAC)

• Working temperature: –40℃ ~ +75℃ (full output below 50℃)

• Dimension: 106.5mm(W) × 286mm(D) × 41.5mm(H) (1U/H)

• Weight: ≤2kg

• Cooling mode: Forced cooling

• Power factor: ≥0.99

• THD: ≤5%

• DC output: –43 ~ –58VDC, rated –53.5VDC, maximum 55A

Controller

• Model: MC2600

• Signal input: 3 AI (3 ambient temp), 7 DI

• Alarm output: 6 dry contact

• Communication port: RS232/485, SNMP

• Display mode: LCD

Environment

• Operating temperature: –40℃ ~ +65℃ (full output below 50℃)

• Storage temperature: –40℃ ~ +70℃

• Operating humidity: 5% ~ 95% (non-condensing)

• Altitude: 0 ~ 3000m (If the altitude is within the range of 2000m to 3000m, the maximum operating temperature decreases by 1℃ as the altitude increases by 200m.)