The NRT4-U030B is the 3kVA model in Socomec's Netys RT4 family, the brand's latest generation of single-phase online UPS. Because it uses true online double-conversion topology, the connected load runs continuously on regenerated, voltage and frequency regulated power with zero transfer time when the mains fails. That makes it a straightforward choice for a rack of servers, a network core, a small comms room or any load that cannot tolerate even a momentary drop. At 3kVA it also delivers a full 3000W thanks to a unity output power factor, so you get the entire nameplate rating as usable watts rather than losing headroom to a 0.8 or 0.9 factor.

The unit ships ready to rack or stand, with a supplied rail kit, internal batteries, an Australian input cord and both an Australian conversion cord and an IEC output cord. A C19 outlet plus eight IEC C13 outlets (four of them programmable) let you stage shutdown or reboot groups, and USB plus RS232 MODBUS ports with an optional NET VISION SNMP card give you full monitoring and integration. Below is the complete specification for this model, the wider Netys RT4 range for sizing up or down, where it fits, how it compares, and how Indigi supports it after the sale.

Why the Netys RT4 leads at 3kVA

NRT4-U030B specifications

The full Netys RT4 range

If 3kVA is not quite the right fit, the Netys RT4 family spans 1kVA to 10kVA on the same online double-conversion platform, so you can size up or down without changing UPS technology. Each model pairs with a matching battery expansion module for longer autonomy.

Runtime, batteries and monitoring

On its internal batteries the NRT4-U030B gives around 10 minutes of standard autonomy at 75% load per the Socomec datasheet, which is long enough to ride through short outages and shut connected servers down cleanly, the most common requirement in a comms room backed by a generator or where the goal is graceful shutdown rather than hours of standby. Where a site needs longer autonomy, the matching NRT4-B030 battery expansion module extends runtime, and more than one module can be added so the UPS is sized to the actual ride-through target rather than a guess. Because runtime falls as load rises, the right number of modules depends on how many watts the rack actually draws, not on the UPS nameplate, which is why sizing is best confirmed against a measured or estimated load.

Monitoring is built in. The USB and RS232 MODBUS ports let the UPS signal a connected server to shut down automatically when the battery runs low, and the communication slot accepts a NET VISION SNMP card so the unit appears on the network for remote monitoring, alerting and integration with a building management system. For fleets of units across multiple sites, network monitoring turns a set of standalone UPS into a managed estate where battery health and events are visible from one place, which is exactly the kind of visibility that supports uptime commitments and audit requirements under frameworks such as APRA CPS 230 for regulated organisations.

Typical applications

A 3kVA online UPS like the NRT4-U030B is the right size for a wide band of Australian critical loads. Common deployments include:

• A rack of servers, storage and switches in a small to mid-size comms room
• Network core and edge cabinets where zero transfer time protects routing and voice
• Medical, imaging and laboratory equipment sensitive to power quality
• Point-of-sale, security, access-control and CCTV head-ends
• Industrial control cabinets and PLCs on a single-phase supply

Not sure whether 3kVA and the internal battery give you enough ride-through for your load? Our UPS runtime and battery sizing calculator returns an indicative figure in under a minute, and Indigi can confirm the sizing and whether an NRT4-B030 expansion module is worthwhile.

How the NRT4-U030B compares

The Netys RT4 3kVA competes with other 3kVA online rack/tower units such as the APC Smart-UPS SRT. The key practical difference is usable watts: the Netys RT4 delivers a full 3000W at unity power factor, where many competing 3kVA units are rated to a lower wattage.

Installation and maintenance

The NRT4-U030B plugs into a standard single-phase outlet, but hard-wired installations, rack integration and switchboard work should be carried out by a licensed electrician to AS/NZS 3000. Indigi installs single-phase UPS from $850 for units up to 3kVA, and can rack, cable, commission and load-test the unit as part of the job. Once it is running, a preventative maintenance visit keeps the batteries healthy and the firmware current: a one-off Socomec service is $720 ex GST, or a standard annual plan is $1,940 per year ex GST covering inspection, battery testing and reporting. See single-phase UPS installation and commissioning and UPS maintenance plans for detail.

Frequently asked questions

What load can the Socomec NRT4-U030B support?

The NRT4-U030B is rated at 3000VA and 3000W. Because it has a unity power factor, it supports up to 3000 watts of real load, which is enough for a typical rack of servers, storage and switching in a small to mid-size comms room.

Is the NRT4-U030B a rack or a tower UPS?

Both. It is a convertible 2U rack and tower unit and ships with a rail kit, so you can mount it in a standard cabinet or stand it upright as a tower in a comms room, whichever suits your site.

Can I extend the runtime?

Yes. The internal batteries give around 10 minutes of standard autonomy at 75% load for a safe shutdown. To extend autonomy, add the matching NRT4-B030 battery expansion module. Indigi can size the number of modules against your load and required ride-through.

What warranty does it come with?

The NRT4-U030B carries a 2-year standard UPS warranty that can be extended up to 5 years. Keeping the unit on a preventative maintenance schedule protects battery life and helps you get the most reliable service from it over its life.

Does it need a licensed electrician to install?

A plug-in install can be done by the user, but rack integration, hard-wiring and any switchboard work should be completed by a licensed electrician to AS/NZS 3000. Indigi provides full installation and commissioning from $850 for single-phase units up to 3kVA.

Can I monitor the UPS over the network?

Yes. USB and RS232 MODBUS ports are standard, and an optional NET VISION SNMP card fits the communication slot so the unit can be monitored over the network, with LOCAL VIEW software and the SoLive app for local and cloud monitoring.

Related products and services

• Browse the full Socomec UPS and Netys RT4 range
• Socomec UPS systems Australia guide
• Single-phase UPS installation and commissioning
• UPS maintenance services and maintenance plans
• UPS runtime and battery sizing calculator
• Compare with Eaton UPS systems

Need the NRT4-U030B supplied, racked and commissioned? Tell us your load and site location and Indigi will quote supply, install and maintenance under one contract. Indigenous and Veteran-owned, Supply Nation and ICN Gateway registered. Contact Indigi Power and Cooling