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Last modified  19th February 2012 Copyright Eta Projects Ltd

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                                                                                                                                                                                           New UPS System for Harms Quay Printing :  
                                                                                                                                                                                          An Eta Projects product story by Buildingtalk editorial team
  
Eta Projects was commissioned to undertake the UPS replacement project at the Daily Mail Group main Surrey Quay printing complex, which operates 24-hours, 365 days a year. "No Break in Power Supply Allowed", was the brief given by the client to specialist consultant engineers

Eta Projects . Uninterruptible power supplies provide critical power protection to the publishing activity and printing presses. Eta Projects replaced the existing aged 6-module, 6-pulse units with 2 x 200 kVA UPS modules. The new 'state-of-the-art' systems are expandable with additional modules if required. Installation of these efficient, precisely sized units and reduced maintenance costs have resulted in annual savings of £43,000k, including CCL charges. The project was initiated as part of the HQP commitment to energy saving under their Climate Change Levy Agreement with the BPIF. The new UPS  units incorporate rectifier technology, which delivers performance significantly better than the latest 12-pulse technology. The design provides less than 6.5% input current distortion, thus eliminating the common problem of voltage and current distortion on the incoming supply. These low harmonic characteristics also assure compliance with G5/4, the supply utility limits for harmonics reflected back onto their supply system. Power monitoring of the new UPS system, recorded efficiency improvement from 56% to over 90%, delivering an energy saving of approximately 455,520kWhr per annum.

 Based on the new 2006 agreed energy tariffs, annual costs saving of £28,000 were achieved. This improvement in energy efficiency enabled the de-commissioning of four 7.5kW split air conditioning units adding further annual energy saving in the order of £3,000. Maintenance costs were reduced from £17,000 per annum for the aged UPS modules to £4,000 per annum for the new system.

 

Harmsworth Quays Printing

Combined savings, including CCL charges, annual savings of £43,000 were achieved. The UPS system was designed to intergrate into the "A" and "B" supply distribution system, each supply sharing the load equally during normal operation; but equally sized to support the total UPS load should any one individual supply fail
or be out of service.

Full "Mains wrap- around bypass" was provided which can only be operated when the UPS modules are driven to bypass. This is either carried out via the UPS menu screen or automatically, by withdrawing a Castell Key from the UPS module. Additionally, the system was designed with advanced power meters on both the front and output of the UPS, linked to the central power monitoring systems in the Building Managers offices. This enables monitoring of the UPS system performance at all times. The monitoring system is configured with pre-emptive alarms to record abnormal events on the supply, i.e.voltage sags etc Eta Projects took full responsibility for the "No Break" changeover from the old UPS to the new UPS system. The changeover from old to new was carried out with no interruption to supply and was carried out during a low printing demand period to minimise risk to business. The UPS change-over was was carried out by Eta Engineers personally supervised by the HQP Building Manager with each switching operation pre-rehearsed under a safety programme, documenting each single operation to ensure no risk to business.