Feature Panel Building Electrical upgrade for Grade II building
Memshield 3 smart boards and MCCB panelboards from Eaton are playing a key role in the upgrade of electrical distribution equipment in the Grade II listed George’s Dock Ventilation and Central Station of the Mersey Road Tunnel building
their removable cross rails meant it was possible to lay cables into the board instead of feeding them through a gland plate aperture offering signifi- cant time savings and making the installation much easier.
here were several contributing fac- tors that led to Eaton’s products being chosen for the George’s Dock project - primarily because of their performance, the support provided by Eaton engineers who carried out a detailed site survey before the order was placed, and on Merseytravel’s posi- tive experience of working with Eaton on previous projects.
T Opened in 1934, George’s Dock
Ventilation and Central Station build- ing houses not only one of the ventila- tion shafts for the Mersey Road Tunnel but also offices that were, in former times, home to the tunnel operator’s administrative team. The building is still in full use but a recent review identified that the electrical installa- tions did not have sufficient capacity to meet current and planned future demands, and that the equipment was reaching the end of its useful life. As a result it was decided that the building’s electrical systems should be replaced in their entirety. However, this presented a number of challenges, not least because the space available to accommodate the riser cables was very limited. In addition, as is typical of a building of this age, the risers were not aligned vertically. However, significant modifications to the structure of the building were out of the question because of the building’s listed status and architectural value.
Making things easier
For this reason, the decision was taken to use Eaton’s MCCB panelboards as
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Other key requirements of the new distribution system were that it should provide flexibility to cope with future needs, and comprehen- sive metering in line with Part L2 of the Building Regulations. To meet these requirements cost effectively, Merseytravel selected Memshield 3 distribution boards. These space saving compact boards are available with MCCB incomers rated up to 250A and can support sub- loads up to 125A, which means that they can often be used in place of larger and more costly panel boards. For this project, Memshield 3 smart boards, which split the power and lighting loads for easier metering, were used in conjunction with Memshield 3 meter packs. The meter packs accu- rately measure the energy usage of groups of loads and, as well as display- ing this information in real time, they also make it available to the site’s building management system via a Modbus RS485 interface.
Left: Eaton has provided electrical distribution equipment (including
Memshield 3 smart boards - right), to the upgrade of the Grade II listed George’s Dock Ventilation and Central Station of the Mersey Road Tunnel building
A happy customer
“The electrical equipment from Eaton has proved to be an excellent match for our needs,” said councillor Liam Robinson, chair of Merseytravel. “In par- ticular its compact construction has made it possible for us to equip the build- ing with a reliable, future-proof electrical installation without requiring us to make structural changes for which it would have been difficult to get permission. “We’ve also enjoyed excellent sup- port from the Eaton engineers, who have worked with us at every stage of the project to help us choose the right equipment and to make sure we could squeeze it into the very limited space available. We’re very happy not only with the end result of the project, but also with the value for money.”
Eaton
www.eaton.com T: 0161 655 8900
Meeting modern panel needs
are suitable for a range of applications where general switching duties are required. They are suitable for control switches for multiple circuits and for use in main cir- cuits as ‘on load’ switches for motors, machines, heating equipment, lighting, ven- tilation, air conditioning, generator sets, and mains/generator changeover use. In these applications the panel builder or end user not only requires a switch that will meet their electrical performance requirements, but also a handle that is ergonomic, safe and comfortable for operators - and further, one that has all the design functions needed for modern panels. Functions include a door interlock facility to prevent opening of the panel when powered up, IP65 ingress protection, padlockable in the off position (including door interlock), and a defeatable function. Telergon has designed the family of handles to be aesthetic as well as function-
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al, while ergonomics were also a large consideration. Operating a large switch dis- connector requires a lot of force to overcome the torque the switch needs to cleanly break the load. This force puts considerable pressure on the operator’s hands and if the switch is in any way uncomfort- able, then the operation can be much more difficult to perform and in the past has even been known to cause injury. Utilising smooth, flowing curves, Telergon has addressed this by engineering their new handles to be as ergonomic and comfortable as possible without compromising on performance. A full review of the Switchtec Telergon can be viewed at
www.connectingindustry.com/telergon. Switchtec
www.switchtec.co.uk T: 01785 818 600
witchtec has introduced its new Telergon switch disconnectors which have been upgraded - improving comfort and functionality. Telergon switch disconnectors
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Enter 208 MAY 2013 Electrical Engineering
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