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
| Parameter | Value |
|---|---|
| Capacity | Up to 450 A / -48 VDC (540 A on S1/S2 variants) |
| Rectifiers | R48-3500e3 (60 A) or R48-3000e3 (50 A), 3000 W, peak efficiency 97% |
| Voltage | AC input 380 VAC nominal 3-phase, 85-300 VAC operating; DC output -43.2 to -57.6 VDC |
| Dimensions | 8U, 352 x 483 x 400 mm; weight <= 25 kg |
| Distribution | AC input 1 x 100 A/4P; battery 4 x 125 A; DC SPD >= 20 kA |
| Control | M830B or M530B control unit, remote monitoring over Ethernet/dry contacts |
| Compliance | IEC60950-1; MTBF > 200,000 h |
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