UPS & STANDBY POWER FEATURE Power assurance for the insurers
A large 1250 generator and a 400kVA uninterruptible power supply (UPS) system from shentongroup was installed as part of a refurbishment of an old retail headquarters in Southampton for its new occupiers - a large insurance company
Left: the system was delivered in three parts (main container, exhaust system and outlet attenuator) and craned in using a contract lift
more costly than standard bulk fuel tanks as the standby generator and the supporting infrastructure has to fit within a restricted space. The engine size had been calculated to
deliver adequate power to the building, allowing for ‘normal’ levels of power demand. In addition the generator on this site has been sized to almost the main supply capacity so the business is covered for future expansion. As a day to day
communication and control throughout the installation, this way of working also combines the expertise of electrical installation with the specialist generator knowledge from the shentongroup project team. Ultimately this delivers a solution with both operational and aesthetic benefits. The most complex area to manage was
‘The standby T
he existing building was redeveloped and, due to the nature of the business,
a standby generator for the building’s data centre and overall infrastructure was required. In addition. a UPS was specified to support the data centre only. The engine size, decibel levels, power capacity and fuel capacity of the generator had all been specified. Shentongroup were commissioned by the electrical contractor for the design, approval, transport and delivery and installation of the generator to meet the specification.
DESIGN AND PROJECT MANAGEMENT Although working within an existing building, the scope of works made the project more similar to a new build. Despite this, the job still had a number of complex design considerations. Using a specialist for generator
design, as well as supply and installation, minimises the risk for the electrical contractor. Shentongroup took full design responsibility covered by professional indemnity insurance. The standby generator had to be
designed to perform to specification, without the requirement for bulk fuel tanks. The site and availability of space meant that the fuel capacity had to be contained within the main container. Shentongroup designed a bespoke fuel container to meet the requirements. Although smaller, this option is often
/ ELECTRICALENGINEERING ELECTRICAL ENGINEERING | MARCH 2014 11
place of work, noise levels within the building were also important. The decibel level was specified to meet 85db at 1m - on the final test the installed reading achieved 76.7db. As the functionality of the specified system was critical for business continuity, a customer witness test was carried out before work on-site began. Both the electrical contractor and M&E consultant for the client were part of this process. Working with the whole project team brings knowledge from the design and installation through to the day to day operation of the system. Full risk assessments and method
statements (RAMS) were created for transportation, delivery and installation. Shentongroup worked together with
the electrical contractor to manage the install. As well as having better
Right: the installation of the standby generator and UPS was completed within the programmed time and covered by the shentongroup Power Care Premier package
generator had to be designed to perform to specification, without the requirement for bulk fuel tanks.’
the transportation and delivery of the system. The 18 tonne generator required specialist transportation due to its sheer size. Measuring 9.5m long, 3.5m wide and 3m wide, the system was delivered in three parts (main container, exhaust system and outlet attenuator) and craned in using a contract lift. As the site was vacant a full system test could take place without planning in continuity of power for the change over. This critical test gave the client peace of mind that the maintained system will protect the business in case of power failure - from a ‘glitch’ to an
extended power cut.
SUMMARY The installation of the standby generator and UPS was completed within the programmed time and covered by the shentongroup Power Care Premier package. This includes an annual standard and major service, remote monitoring, 24/7 technical support (with emergency response) and refuelling. Parts are covered under the comprehensive guarantee. The new occupants of Portswood House
can be confident that, whether a brownout or blackout, their business is protected.
shentongroup
www.shentongroup.co.uk/technical T: 0844 888 4445
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