Vertiv NetSure 731 A91 Embedded 48V DC Power System 450A 8U. Model NetSure 731 A91.

Product Overview

The Vertiv NetSure 731 A91 is a compact embedded DC power system for -48 V telecom and data equipment, housed in an 8U subrack measuring 352 x 483 x 400 mm with a maximum weight of 25 kg, so it mounts directly into standard 19-inch cabinets. The system delivers up to 450 A output (540 A on the S1/S2 variants) using Vertiv R48-3500e3 (60 A) or R48-3000e3 (50 A) rectifiers with 3000 W modules reaching a peak efficiency of 97%.

Rated for a 380 VAC nominal three-phase input with an operating window of 85-300 VAC, the A91 keeps the plant running on weak or unstable grids. Output voltage is adjustable across -43.2 to -57.6 VDC, battery connection is provided through four 125 A breakers, and AC distribution is a 100 A/4P input with DC surge protection of at least 20 kA.

Control and monitoring are handled by the M830B or M530B control unit with remote management over Ethernet and dry contacts, and the platform is qualified to IEC60950-1 safety with an MTBF above 200,000 hours. The product is published by Vertiv in the NetSure 731 family catalog for the Asia-Pacific region.

Key Features

• 8U embedded subrack 352 x 483 x 400 mm, max 25 kg, for 19-inch cabinets
• Up to 450 A output (540 A on S1/S2 variants) at -48 VDC
• R48-3500e3 (60 A) or R48-3000e3 (50 A) rectifiers, 3000 W, peak efficiency 97%
• Three-phase 380 VAC nominal input, 85-300 VAC operating window
• Output adjustable -43.2 to -57.6 VDC
• M830B/M530B control unit with remote monitoring
• Battery input 4 x 125 A; AC input 1 x 100 A/4P; DC SPD >= 20 kA
• IEC60950-1 safety compliance; MTBF > 200,000 h

Specifications

Key Features of NetSure 731 A91

NetSure 731 A91 is part of the 48 V DC power system family widely used in telecom and data applications. Systems of this class commonly combine rectifier modules, monitoring controllers and distribution units in rack or cabinet formats.

Typical Applications of NetSure 731 A91

DC power systems of this type are widely used in telecom equipment rooms, base station sites, data centers and industrial control environments that require reliable -48 V DC power.

Selecting NetSure 731 A91 with BS Comtec

BS Comtec supplies DC power systems and rectifier modules from Vertiv, Huawei, ZTE, Eltek and other brands with global delivery. Tell us your load budget, battery requirements and installation space for a tailored proposal.

Frequently Asked Questions

How do I size NetSure 731 A91 for my site?

Start from your steady-state and peak DC load, redundancy requirements (N+1 or 2N), battery backup time and expansion plans. BS Comtec can model these figures and propose a suitable configuration.

Can NetSure 731 A91 work with my existing rectifiers or batteries?

It depends on voltage range, communication protocols and mechanical compatibility. Provide your current system details and BS Comtec will review interfaces and recommend a compatible combination.

How is NetSure 731 A91 shipped and delivered?

Systems and modules are packed for international freight, and lead times vary by model and destination. Contact BS Comtec for current availability, shipping options and delivery schedules.

What warranty and support come with NetSure 731 A91?

Warranty follows the manufacturer’s policy for the ordered configuration. BS Comtec assists with commissioning guidance, spare module supply and service coordination where required.

Where is NetSure 731 A91 typically deployed?

It is commonly deployed in telecom central offices, outdoor cabinets, data centers and industrial facilities that rely on stable -48 V DC distribution.