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Topic Title: Lighting sensor
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Created On: 28 November 2012 09:38 PM
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 28 November 2012 09:38 PM
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lyledunn

Posts: 607
Joined: 13 August 2003

I am in the process of fitting out a new training classroom in which it has already been decided to fit 40no 600x600 4x 18w T5 HF modulars. It is a large room and may be occupied by a small number of people who may be relatively immobile. I was wondering if any one could recommend a reliable occupancy sensor?
Client not interested in dimming etc, only compliance with Building Regs.

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Regards,

Lyle Dunn
 28 November 2012 09:48 PM
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leckie

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Danler, Steinel, Lutron
 28 November 2012 09:55 PM
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OMS

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Split it into groups perhaps Lyle - it'll be a hell of a good sensor if it can cope with bang switching of 40 No 4 x 18W HF fittings on multiple circuits (and at 2.4 centres is going to be bloody bright as well)

Split it into roughly 40m2 sections would be my advice.

Or put in a cheap LMS controller via marshalling boxes - one PIR per say 9 luminaires

regards

OMS

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Failure is always an option
 29 November 2012 12:47 PM
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Westonelectrical

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Nail on the head
 29 November 2012 02:02 PM
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leckie

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I would have thought that if its one room with people with limited mobility then all lights would require to be illuminated at the same time

So if thats the case you would really want a control circuit for the PIR's to switch contactors to control each circuit

Danlers recommend a grid layout with spacing at 5m.
 29 November 2012 02:27 PM
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OMS

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If you want a simple system that will deal with absence or occupancy switching, manual control if required, link groups or corridor hold, emergency lighting connection and test in a fit and forget box that's quick to install, then try the KliK system from Hager.

9 luminaires will serve an area of about 35m2 so zoning to 40m2 as my suggestion is easy. You can configure that any PIR brings on the whole room, just the group or will also trigger the adjoining group to avoid users sitting in a small pool of light at times of partial occupancy

If there is adequate daylight, I'm suprised at no daylight linking for dimming but the PIR's also have a photocell that will turn off luminaires if adequate daylight is present.

We've specified a few and no reports of problems

Regards

OMS

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Failure is always an option
 29 November 2012 06:52 PM
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lyledunn

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Thanks guys, I was really only looking for a recommendation for a simple presence detector. Really fed up with poor quality / faulty products recently even from the well-known brands.
The detectors will be in parallel and control a governing contactor which in turn will serve 6 lighting circuits via relays and local switches.

-------------------------
Regards,

Lyle Dunn
 29 November 2012 07:12 PM
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OMS

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LoL

sounds a bit jerry-built but I guess if it works and complies then hey-ho!


- Danlers then

OMS

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Failure is always an option
 29 November 2012 07:25 PM
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lyledunn

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LoL; Is that lots of love or laugh out loud?. Leveson has thrown me in to a state of confusion! I hear Nick is suggesting that Dave regulates against its use just so that such things are not mis-interpreted, just like some posts!

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Regards,

Lyle Dunn

Edited: 29 November 2012 at 10:46 PM by lyledunn
 29 November 2012 07:39 PM
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OMS

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lets try LMFAO then Lyle -

just be a bit mindful of the inrush if the whole lot starts in one go from a contactor - 40 No 4 x 18w will be a bit of crack for sure

OMS

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Failure is always an option
 29 November 2012 10:53 PM
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lyledunn

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Yep OMS acknowledge that, cheers. Probably best to have at least a couple of contactors to, dare I say it, spread the crack.

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Regards,

Lyle Dunn
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