Deritend has completed the commissioning of over 70 individual EFF1 high efficiency electric motors coupled with matched variable speed drives at the Hammersmith Hospital
Mike Smith based at Deritend’s Luton Engineering Centre is co-ordinating the project on behalf of Deritend, “Both hospitals are part of the same NHS trust, and the Estates Management team are responsible for both, having won the contract to supply and commission the equipment, we were then presented with the very real consequences of not meeting our targets for installation and commissioning windows, in an extreme circumstance it could quite literally have been life and death.”
NHS Trust Estates Manager Ian Svenson, “The work needed careful management and planning so that Deritend could be given access to heating and air conditioning (HVAC) areas throughout both buildings, where the pumps and fans were located. We used relatively quiet times during the night for commissioning and switch over, giving the electrical engineers an eight hour window when individual areas such as operating theatres could be taken off the rota and powered down.”
The panels were mainly built off-site while the majority of the power and control cabling was completed on-site, working alongside the existing installations during the day. Varying in size from small 5.5kW pump motors through to 75kW units for the main air movement fans, the logistics were a constant challenge. Some smaller pieces could be wheeled in on a trolley and positioned by hand, others however required the removal of roof panels to lower units into place using a small crane, all without materially affecting the normal operation of the hospital.
The entire project totalling 72 motors and drives is due to be completed on schedule, Mike Smith adds, “We believe the ability to deliver was one of the main reasons Deritend won this contract, we have extensive experience in this field and were able to talk to the estates management team about every detail of the project. Our cost was competitive and there is the added reassurance that the WEG motors and drives we installed are designed to work together for maximum reliability and efficiency, and are supported by a full 3 year guarantee.”
The control and power management panels, including the drives, are all controlled via a Trend Building Management System (BMS) using SCADA style PC visualisation to make the new equipment visible to the facilities teams. The integration went very smoothly with a simple plug-in connection to the BMS system, allowing finely tuneable and efficient variable speed control in place of mechanical throttling of pumps and baffles in air movement systems.
The Deritend Group Ltd
The Deritend Group Ltd provides UK industry with the widest range of maintenance and management services designed to optimise business activities, improve efficiency and reduce costs. The Group operates in eight areas of competence: customised asset management, electro-mechanical, maintenance, energy management, product sales, pre-formed windings, induction services and automation & control. These services are brought to customers through a network of national service centres. Staffed by trained professionals, the centres are on hand 24- hours-a-day, 7- days a week to respond to customer needs and provide effective maintenance solutions.
The Deritend Group Ltd, Cyprus Street Off Upper Villiers Street, Wolverhampton, West Midlands WV2 4PB Tel: 01902 – 392315
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
WEB: www.deritend.co.uk
