Vertiv NetSure 531 A91-S1 48V 375A 18kW Rack-Mount DC Power System

Specifications

Product Overview

The Vertiv (formerly Emerson) NetSure 531 A91‑S1 is a carrier‑grade 19‑inch rack‑mount DC power system engineered for high‑power telecom applications including macro base stations, LTE/5G coverage, FTTx broadband, IDC equipment rooms and outdoor communication cabinets. It delivers stable adjustable –48V DC output up to 375A / 18kW with industry‑leading efficiency and reliability.

Built with hot‑swappable R48‑2000e3 high‑efficiency rectifiers and intelligent M222S/M830B monitoring controllers, this system supports full front maintenance, remote management, and comprehensive battery protection. It is the preferred high‑power rack power solution for mission‑critical communication infrastructure.

Key Features

Standard 19‑inch 8U rack‑mount design, high power density and space‑saving

Wide AC input range 85–300VAC, 45–65Hz, strong adaptability to unstable grids and generator power

Stable adjustable DC output –42V ~ –58VDC, nominal –53.5VDC, max output current 375A, rated power 18kW

Supports up to 9×R48‑2000e3 high‑efficiency rectifier modules, peak efficiency up to 96%, power factor ≥0.99

Hot‑swappable modules: plug‑and‑play replacement without system shutdown

Full front maintenance & wiring, easy installation and later maintenance

Intelligent monitoring: real‑time data display, fault alarm, remote communication (RS232/Ethernet/SNMP)

Intelligent battery management: BLVD/LLVD, temperature compensation, capacity test, prolong battery life

Wide operating temperature –40°C ~ +70°C, suitable for harsh environments

Complete protection: OVP, OCP, SCP, OTP, LVBD, surge & lightning protection

Compliant with CE, UL, NEBS and global telecom safety standards

Technical Specifications

Applications

4G / 5G macro base stations and outdoor macro sites

LTE indoor coverage & distributed base stations

FTTx & optical access network equipment

IDC data centers & core communication equipment rooms

High‑power industrial control & critical DC power loads

Outdoor integrated cabinets & harsh environment sites

Why Choose Us

We are a professional manufacturer and one‑stop solution provider for communication DC power systems, boasting mature R&D strength, large‑scale production capacity and flexible service modes. We fully support OEM and OBM cooperation, helping global partners create differentiated power products and brands.

Powerful R&D & Customization Ability

We have a professional technical team with years of experience in the power industry. We can provide personalized customized services covering power configuration, external interfaces, functional parameters, appearance design and logo printing, to satisfy diverse demands from telecom operators, system integrators and equipment manufacturers.

Comprehensive OEM & OBM Services

We offer full‑cycle cooperation support from product design, prototype testing, certification to mass production. With efficient development process and strict quality management, we help you quickly launch products and build exclusive brand advantages.

Large Production Capacity & On‑time Delivery

We own standardized production workshops and complete production lines. Relying on a stable supply chain and mature production technology, we maintain sufficient inventory and strong production capacity, ensuring on‑time delivery even for bulk orders and long‑term cooperative supply.

Strict Multi‑level Quality Inspection

All products will pass full‑load operation test, high‑low temperature aging test, safety performance test and simulated on‑site operation test before delivery. We adopt high‑quality original components and implement strict quality control standards to guarantee long‑term stable operation of products in various harsh environments.

Full Lifecycle Technical & After‑sales Support

We establish a complete service system including pre‑sales consultation, in‑sales technical guidance and after‑sales maintenance. Our technical team responds quickly to provide remote debugging, on‑site technical guidance, equipment maintenance training and spare parts supply, protecting the stable operation of your power system all the time.

Rich Global Project Experience

Our products have been exported to many countries and regions, widely applied in communication, data center, industrial control, new energy and other fields. With rich global project experience, we can provide targeted power solutions for different regional standards and application scenarios.

We sincerely look forward to establishing long‑term stable cooperative partnership with you.