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500kVA rated UPS systems for medium to large datacentres and other types of critical environments. The UPS are rated at 500kVA or higher. Units with a Unity power factor are shown as a kW-rating. Monoblock UPS can be operated in a parallel/redundant N+X configuration to provide additional resilience. Modular UPS systems can be extended to the full capacity of their frames of supplied with modules arranged to achieve N+X scalability or redundancy. Battery sets are supplied in external battery cabinets or racks for a range of runtimes and can be configured using sealed lead acid maintenance free or lithium-ion batteries. Transformerless UPS will have high operating efficiencies and transformer-based systems will be suitable for industrial UPS applications. Customisation and bespoke options are available for harsh environments. Static transfer switches for and centralised bypass arrangements are available.
Server Room Environments provides a complete electrical installation service for 500kVA/500kW rated UPS systems by NICEIC certified electrical contractors. The installation service covers every aspect you could need in a UPS installation including:
Electrical Site Survey: to assess the electrical infrastructure and advise on any necessary electrical works to upgrade prior to the installation of a UPS system. This includes checking wiring and circuit breaker sizes, distribution arrangements and discrimination for fault clearance.
External UPS Bypass Switches: a maintenance bypass switch allows your UPS to be serviced without disruption to the connected load(s). Your UPS system may include an internal maintenance bypass switch. An external UPS bypass allows the system to be fully powered down and removed without load disruption. Bypass arrangements can be configured for single or parallel/redundant configurations.
Electrical Site Survey: on-site battery build may be necessary for UPS extended runtimes where the weights of the batteries or size of the cabinet are two large for delivery as a standard unit. The electrical installations team can provide full onsite battery builds using DC certified and trained engineers.
Server Rack Power Distribution: another key aspect of the installation of an uninterruptible power supply is distribution of the protected power from the output of the UPS to the load(s). The electrical installation will include distribution arrangements as required. This can include power cords with Commando type sockets run from a wall mounted sub-distribution board to each server cabinet into which a power distribution unit can be connected, to overhead cable trays and trunking, and any extra sockets or hardwired outlets required within the facility.
Remote Monitoring: your UPS system will most likely be connected to the local IP network for remote monitoring and control. The electrical installations team can provide IP sockets and cabling as required for the network connection.
Commissioning: commissioning is completed by a UPS manufacturer certified UPS engineer. If required, our electrical installation teams will arrange for load banks if site acceptance testing (SAT) is specified.
Standby Power Generators
The installation of a local standby power generator can be used to provide a 500kVA rated UPS with additional runtime up to 8 hours or more using a stored energy source including diesel or liquid petroleum gas. The generator and alternator will need to be sized for the UPS with a typical recommendation of 1.25 times the size of the UPS system.
Lead acid battery sets can also be sized for long runtime applications up to several hours with an appropriately sized charging capacity from the UPS rectifier or an external charger.
For more information please contact our projects team.
Edge computing coupled with 5G mobile wireless technology promises to be the next stage in the 5th industrial revolution and to provide the bridge to many new services, some of which are still ideas in their nascent stage of ‘if I had an App for this…’
There are several key choices to make when it comes to selecting the right uninterruptible power supply to install with a server rack. These include not only the topology but the load size, form factor, runtime, access for maintenance and connectivity.
Power supply design is one of the key decisions that must be taken whenever building a new server room or refurbishing and existing one. There are several elements to consider even for a single stack rack cabinet if you are to ensure that your server installation can run through power outages.
The critical power path in a server room, datacentre or other type of network environment is the path from the building incomer (mains power supply) to the critical load connection socket or terminal (PDU). Elements within the critical power path can include LV switchboards, UPS systems and standby power generators, transformers, sub-distribution panels, power distribution units, fused spurs and socket outlets.
Power factor is the ratio of Real Power (W) to Apparent Power (VA) in an AC circuit. Power Factor corresponds to the phase-angle difference between the load drawn voltage and current waveforms.
Power factor is shown as a decimal number or percentage i.e. 0.65pF = 65% between 0-1pF and 0-100% respectively.
Power Factor formulae include:
Power Factor (pF) = Real Power (W) ÷ Apparent Power (VA) = CosØ
If we know the Power Factor and Real Power we can calculate:
Apparent Power (VA) = Real Power (W) ÷ Power Factor (pF)
If we know the Apparent Power and Power Factor we can calculate:
Real Power (W) = Apparent Power (VA) x Power Factor (pF)
Edge computing pushes data processing nearest to the device that needs the information to operate, rather than pushing the data back to a centralised datacentre. Edge computing is essentially a de-centralised approach. In terms of power protection to ensure resilience in an entire decentralised eco-system it is important to protect both the servers within the cloud datacentre and each data-processing point along the Edge computing network. Larger three phase UPS systems may be required for datacentres with far smaller uninterruptible power supplies required for small load servers, PCs and Internet of Things (IoT) devices.
