Product category:
Electrical Services
News Release from: Hager | Subject: Hager distribution boards
Edited by the Buildingtalk Editorial
Team on 22 May 2007
Protection and energy saving for Tesco
Homeplus
Contractor Essex Electrical Group Plc has used Hager distribution boards to provide both circuit protection and a simple energy saving control solution for Tesco's new Homeplus stores.
To date Tesco is trialling seven non-food stores under the brand Homeplus In common with the group's corporate policy, the stores aim to minimise their use of energy
This article was originally published on Buildingtalk on 9 Sep 2008 at 8.00am (UK)
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Each store has a sales area of more than 30,000 sq ft.
Hager distribution boards provide all the circuit protection.
The company's contactors, time switches and photocells also provide lighting control.
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Lighting can account for more than 50% of the energy usage in a retail outlet so this was a key energy saving initiative.
Typically each store has a panelboard with a mains incomer of either 400A or 630A.
This then feeds up to 12 sub-distribution boards, most of which are TPandN but with some SPandN boards.
The lighting control uses a combination of a master keyswitch, digital time switches and photocells all of which switch the luminaires via contactors.
The lighting circuits are split so that 40% can be switched on for cleaning and/or shelf stacking, with the remaining 60% switched on when the store is open to the public.
The master key switch turns on 40% of the lighting at the beginning of the shift and then turns off all the lighting at the end of the day.
Digital time switches switch on the remaining lights when the store opens and also turn off 60% of the lighting when the store closes to the public, for shelf stacking and cleaning, and finally the remaining circuits at the end of the day.
In addition photocells turn the lighting circuits on or off in response to natural daylight levels.
Roof lights maximise the amount of natural light available.
Comments Andy Collinge, contracts manager for Essex Electrical Group: 'Tesco has opted for simple but effective control of their lighting in their new Homeplus stores.
Using time clocks and photocells for automatic switching removes the responsibility from the staff and ensures an energy efficient solution.
'Using Hager's digital timers saved us a lot of installation time.
Not only do they have a weekly cycle option to account for different opening times, but they also have an intelligent key that can be pre-programmed with the desired settings.
'For multiple installations with several lighting circuits that are the same, using these timers saved a lot of commissioning time. Request a free brochure from Hager ...
It also ensures that the different stores have the same lighting control for consistency and if the opening times need altering this can be done quickly and with minimum disruption.'.
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