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Highly efficient power supply and backup power supply solutions to telecommunications, information and industrial technologies.

 

UPS Next Energy NXE


HIGHLIGHTS

  • Efficiency up to 97% in double conversion
  • kW = kVA (pf 1) up to 40°C
  • Transformerless UPS
  • Full front access, back-to-back install
  • Active Filter Mode (ACTIVE ECO)
  • Colour LCD Touch Screen
  • Peak shaving

The Riello UPS NextEnergy is the latest UPS series designed for mission critical applications as data centres, communication networks, commercial and industrial installations.
The three-phase UPS offers transformer-free double conversion technology VFI SS 111, with integrated IGBT three-level design. NextEnergy is designed to offer unsurpassed performance and meets the power requirements of tomorrow.
NextEnergy is fully scalable to evolve with growing business demands. It offers the highest level of power availability as well as reduced TCO, minimum energy consumption and CO2 emissions. Its unity power factor and easy system upgrading make it the ideal solution for the business continuity of any IT application. Thanks to its fault tolerant architecture, concurrent maintainability and hot scalability, NextEnergy guarantees continuous operation and premium protection for your customers’ business.

General Features

ZERO IMPACT SOURCE AND PEAK DEMAND MANAGEMENT

NextEnergy is designed with the latest technology to prevent disturbances on the mains and is able to “clean” the power from e.g. harmonics generated by non-linear loads. The input AC/DC converter is based on the IGBT rectifier design using the latest 3-level technology. The key features are:

  • input current distortion < 3%
  • input power factor 0,99
  • power walk-in function that ensures progressive rectifier start-up
  • start-up delay function, to restart the rectifiers when mains power is restored.

PEAK SHAVING FUNCTION

Thanks to the possibility to set the maximum input power (kW or kVA), NextEnergy can be installed into AC supply systems with limited power availability such as a diesel generator or contractually reduced power sources and then supply the additional power required using the batteries (Peak Shaving function).
NextEnergy offers 3 peak shaving operation modes:

  • Static: the NXE input power is programmed at commissioning time;
  • User Remote control: the user decides when reduce the input power of the UPS via commands;
  • Dynamic: the peak shaving works automatically as per the site conditions.

OUTSTANDING PERFORMANCE

  • The latest technology of NextEnergy and the careful selection of high-quality components help to achieve first-class performance such as unity power factor (kVA = kW) and the capability to supply capacitive loads, which are very common in most Data Centres, without any power derating up to 40 ° C;
  • Outstanding system efficiency up to 97% in ON LINE double conversion mode, increasing to 98.5% in ACTIVE ECO and 99% in STANDBY Mode;
  • Specific attention has been given to the ventilation system to ensure the best operational level and long lifetime. This is possible thanks to the automatic fan speed control which constantly adjusts to the specific load level, the fan failure alarm and the fan redundancy architecture;
  • NextEnergy is capable to work at very high ambient temperature, over to 40 °C. The UPS is designed with consistent safety margins granting operation up to 55 °C (condition apply).

SMART BATTERY MANAGEMENT (SBM)

The battery system is the energy reserve in every UPS installation and consequently a fundamental asset in every power continuity plan to ensures the correct operation in case of mains failure. This asset must be carefully managed.
NextEnergy includes all the latest features supervise, to prolong the battery life and keep the battery working efficiently, as well as advising users about any potential problem.
In addition, NextEnergy allows flexibility on the number of battery cells to choose the most cost-effective solution for the required backup time. The battery charging and discharging is assured by the STEP-UP/STEP-DOWN converter which means that when the batteries are charged and the mains is available, the battery is no longer connected to the supply. This means the ripple current is practically zero which leads to a significant improvement in battery life.

FLEXIBLE BATTERY STORAGE

NextEnegry offers complete freedom to choose the best energy storage device for each type of installation or application. The variety of the charging methods in conjunction with the flexibility offered by the power electronics and the decades of field experience allow to use NextEnergy in conjunction with all the most common type of battery technologies available in the market like VRLA, AGM, GEL, NiCd but also with other type of energy accumulators as Li-ion Battery solutions. For short back-up time from some seconds up to a couple of minutes NextEnergy is released to work also with SuperCapacitors or FlyWheels, a very reliable technology for such applications.

CAPACITY AND INSTALLATION FLEXIBILITY

NextEnergy is designed to guarantee maximum cost savings (TCO) and flexibility of installation to adapt to every need and situation.

  • The UPS ventilation is from the front of the cabinet to the top so no additional rear clearance is required, allowing vast range of layouts configurations, whether it be a straight row, back to wall or back-to-back, the system easily adapts to available floor space;
  • The small footprint of the cabinet and complete front access for all maintenance activities, ensures maximum space for installation and service;
  • NextEnergy includes top and bottom cable entry (on NXE 250, NXE 500 and NXE 600 top on option);
  • Operation without Neutral: NextEnergy can work with (4 wire) or without (3 wire) the neutral line connection (see below picture).
This is an important feature to reduce the TCO of the distribution system, where the neutral line cable is not distributed - savings investment - and the neutral is created by an isolation transformer close to the load.
This is a typical infrastructure solution adopted by modern Data Centre or for installations where the neutral is not used at all, allowing not only reduced cost for the distribution arrangements but also effortless replacement of legacy equipment.

MAXIMUM RELIABILITY AND AVAILABILITY

The NextEnergy architecture and features deliver significant cost savings thanks to an easy adapting to new or existing installations without impacting power infrastructure. This is possible through scalability, granting minimized initial investment (CAPEX), adding power cores as business demands grow:

  • Parallel configuration up to 8 units
    NextEnergy UPS can be connected in parallel with up to 8 units to increase the capacity or add redundancy (N+1). Parallel configuration with common or separated battery is possible.
  • Efficiency Control Mode (ECM)
    Considering that a typical UPS load can vary from 20% to 80%, the ECM function optimises the operating efficiency of a parallel UPS configuration according to the power absorbed by the load: in case of low load, it sets some UPS in “freeze” mode, ensuring redundancy and a working point of the “live” UPS in the higher efficiency working point, during all load conditions (see below picture).
  • Hot System Expansion (HSE) allows the addition of further UPS into an existing system, without the need to switch off the operational units or transfer them to bypass mode.

COLOUR LCD TOUCH SCREEN

Users can benefit from an advanced operation and supervision systems developed specifically for IT personnel, facilities managers and service engineers to ensure that the UPS setup, control and monitoring is easy. NextEnergy is equipped with an LCD touch screen 7” graphic display (800x480 pixels) providing in a user-friendly graphical interface the UPS information: line mimic diagram showing system status, dashboard style indicators for all the system values and conditions, voltage and current waveforms, operating states and alarms. The panel is used for configuration and setting the parameters of the UPS with high security access thanks to 3 separate password levels for users and service engineers.
The main features are:

  • High security access with separate password levels for users, technician and service engineers;
  • User-friendly graphical interface;
  • Single-line mimic diagram showing system status;
  • Contemporary dashboard-style indicators for major system values and conditions;
  • Automatic charting display for logged power and environmental data.

ADVANCED COMMUNICATION AND SUPERVISION

NextEnergy offers wide communication and supervision tools and interface granting an easy integration into any building management system (BMS) and data centre infrastructure (DCIM).

  • PowerShield³ monitoring and shutdown software for Windows operating systems 7, 8, 10; Hyper-V 2019, 2016, 2012 and previous versions; Mac OS X; Linux; VMWare ESXi; Citrix XenServer and many other Unix operating systems;
  • PowerNetGuard and Riello Connect for remote monitoring service;
  • 2 slots suitable for the installation of the communication accessories such as network adapters and BMS interface;
  • Ethernet and USB ports;
  • Relay cards with customized alarms and commands.
More and more applications require the use of lithium batteries that are always paired with Battery Monitoring Systems: for this reason, NextEnergy series offers an advanced interfacing system to easily dialogue with this kind of systems.

OPTIONS

SOFTWARE

PowerShield³, PowerNetGuard.

ACCESSORIES

NETMAN 204, MULTICOM 302, MULTICOM 352, MULTICOM 411, MULTICOM 421, MULTI I/O, MULTI PANEL, EnergyManager.

PRODUCT ACCESSORIES

  • Battery temperature sensor,
  • Isolation transformer,
  • Parallel configuration kit,
  • Synchronisation device (UGS),
  • Hot connection device (PSJ),
  • Battery cabinets empty or for extended runtimes,
  • IP21/IP31 versions, other on request,
  • Cold start: to start the UPS from battery without mains.

OPERATION MODES

The UPS can operate in many Operation Modes, in order to grant always the maximum level of protection and maximum level of efficiency, based on mains quality and load type.

ON LINE
ON LINE Mode (Double Conversion) provides the highest level of power conditioning and protects the load from all electrical network disturbance in terms of voltage and frequency. The overall AC/AC efficiency is up to 97%.

ECO Mode
The load is normally powered from the bypass line while the rectifier keeps the battery charged. When the mains exceeds the limits the load is automatically transferred in ON LINE Mode in approx. 2 msec. The efficiency is more than 99%.

ACTIVE ECO
In this mode the NXE works as Active Filter: the bypass line is the priory source and supplies the active power while the inverter only provides the reactive part of the load. This ensures that the UPS input power factor remains close to unity, regardless of the load power factor. In addition, the inverter operation reduces significantly the harmonic content (THDi) applied to the mains supply. In case of mains failure the transfer time on Inverter is approximately 0 (classified VFD SS 111). Power factor correction plays an active role in reducing the installation’s TCO: it means reduction of Joule losses and voltage drop, for an optimum sizing of electrical equipment such as power transformers, cables, busbars, switch and protection devices. The electric distribution is more efficient and stable. Also, the current distortion (harmonics) generated by non-linear loads such as inverters, computers, drives and so on causes several problems in an electric system. It is important to reduce it. ACTIVE ECO Mode combines high level of availability with important CAPEX and OPEX reduction. The efficiency is more than 98.5%.

SMART ACTIVE
NextEnergy automatically defines whether to operate in ON LINE and/or ECO Mode, this is selected by monitoring the performances of the bypass supply, if this remains stable for a defined period the system stays in ECO Mode otherwise in ON LINE Mode. In SMART ACTIVE operating mode, the NextEnergy is able to combine the superior availability of a double conversion (ON LINE) operating mode with the excellent energy cost savings of a high efficiency mode (ECO Mode) for a reduced total cost of ownership.

SMART CAPACITY TEST (SCT)
Thanks to the Smart Capacity Test (SCT) functionality (Load Test mode) the system can be tested onsite during the commissioning, before it is connected to the real load, without using costly temporary loads, cabling and breakers and without wasting energy from the power network. In this condition the UPS output supplies energy to the input in re-circulating mode. In this mode NextEnergy is low consuming, just the energy due the internal losses.