High-Capacity 3–27kW 7U Rack-Mount DC Power System, Modular 3000W Rectifiers, Wide AC Input, >96% Efficiency

Product Overview

The 3–27kW 7U rack-mounted DC power system is a high-capacity solution designed for telecom networks, data centers, and industrial facilities requiring reliable DC supply. It supports both 380VAC three-phase and 220VAC single-phase input, delivering a stable –43 to –58VDC output with a rated value of –53.5VDC. With a maximum capacity of 27kW, this system ensures sufficient power for large-scale applications while maintaining efficiency above 96%.

The system integrates up to nine rectifier modules, each rated at 3000W and weighing ≤2kg. These modules feature forced cooling, high power factor ≥0.99, and THD ≤5%, ensuring clean and stable DC power conversion. With front maintenance, top cable entry, and IP20 protection, the design prioritizes safety, serviceability, and ease of integration into 19-inch racks.

DC distribution includes six 125A battery breakers and four 63A load breakers, providing flexible and secure load management. The intelligent controller supports 4 analog inputs, 7 digital inputs, 6 dry contact alarms, and remote communication via RS232/485 and SNMP. Local monitoring is enabled through an LCD display.

Built for challenging environments, the unit operates from –40℃ to +65℃, withstands 5–95% non-condensing humidity, and maintains stable operation at altitudes up to 3000m. With its modular architecture and robust performance, the 3–27kW 7U DC power system is an ideal choice for critical infrastructure requiring scalable and dependable energy solutions.

System

• Dimension: 482.0(W) × 350.0(D) × 7U(H)

• Weight: ≤30kg (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 or 220VAC single phase

• Input capacity: 1×63A/3P

• 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: 27kW (3kW × 9)

• Battery breakers: 6×125A/1P

• Load breakers: LLVD: None; BLVD: 4×63A/1P

• DC SPD: 10kA, 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

• Signal input: 4 AI (3 Battery temp., 1 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.)

Introduction 

Tianjin Estel Electronic Science and Technology Co., Ltd (ESTEL(GUANGDONG)TECHNOLOGY CO., LTD), located in China, is a professional supplier of integrated outdoor telecom cabinet and temperature control solutions for outdoor telecom base station. As a science and technology innovative company, we engage in the R&D, manufacture, and sales of telecommunication equipment. Estel has a well-established team of technical and management experts who can meet customers’ specific needs accurately.

The base station integrated solutions and products include outdoor integrated telecom equipment cabinet, battery cabinet, RRU cabinet, power supply cabinet, environment monitoring system, TEC peltier air conditioner, AC220V compressor air conditioner, DC48V variable frequency air conditioner, heat exchanger, rectifier, UPS, embedded telecom power system etc. All the above solutions and products can be custom made.

Our products and solutions have been deployed all over China. Our main domestic customers are China Telecom, China Mobile, China Unicom, State Grid, Shenzhen / Beijing Metro and Huawei / ZTE etc. In addition, our products have been exported to Europe, North America, South America, Central America, Southeast Asia, Africa, Australia, Mid East countries, etc.

“ Customers First, Quality First ” is always our principle. We have attained many certifications, such as ISO9001, ISO14001, OHSAS18001, CE, UL, FCC etc. AS a telecom integrated solutions / energy saving system integrator in China, We have strong advantages in technology competitiveness, management competitiveness ,service competitiveness and price competitiveness. Through many years of experiences in design, production and implementation of different projects around the world, we have gained great reputation. Relying on professional technique and strict quality control, we will continuously offer high cost-effective products and solutions to our respectable customers globally. We will always try our best to meet customers’ need and requirement.

Company Capability

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