[TCUG] Re: Back up power supplies
- From: "Stapley, Mark" <Mark.Stapley@xxxxxxxxxx>
- To: <tcug@xxxxxxxxxxxxx>
- Date: Wed, 23 Apr 2008 08:03:03 +0100
Thank you for your responses.
Regards
=20
Mark Stapley
Traffic Systems Design Engineer
Bedfordshire Highways
=20
Amey | Service is our passion. People, our strength
-----Original Message-----
From: tcug-bounce@xxxxxxxxxxxxx [mailto:tcug-bounce@xxxxxxxxxxxxx] On
Behalf Of Peter Jones
Sent: 22 April 2008 15:44
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] Re: Back up power supplies
Mark,
We debated this matter over the years but agreed that there is a danger
of setting a precedent. If you apply such to one site, you could have a
very difficult argument trying to justify why you didn't apply it to all
sites. Also, it raises the importance of the safety aspect of signals
when in fact, they are mainly to control traffic to improve flow but
obviously have safety factors built in.
Failures happen, and when they do, the courts appear more concerned
with whether or not you have a reasonable system in place. We do, we
have a 3 hour response time for urgent faults and contact the Utility
company for mains fail. However, they do not respond to response times
as such but will give priority normally.
Until all sites are very low voltage and a battery back-up can be
provided... topped up with solar power maybe, I can't see how any
alternative system could be implemented 'reasonably'.
Regards
Peter
Peter Jones
Principal Traffic Systems Engineer
Phone: +44 (0) 151 934 4254
Fax: +44 (0) 151 934 2850
Sefton MBC - UTC
3rd Floor
Magdalen House
30 Trinity Road
Bootle
L20 3NJ
>>> "Stapley, Mark" <Mark.Stapley@xxxxxxxxxx> 22/04/2008 15:07 >>>
Does anybody use a form of back up power supply for their signals when
there is a power fail? If so please could you pass me any info you
have?
=20
Regards
=20
Mark Stapley=20
Traffic Systems Design Engineer| Bedfordshire Highways
t: 08453 656130 | m: 07725 445685 | e: mark.stapley@xxxxxxxxxx=20
Woodlands Annex | Manton Lane | Bedford | MK41 7NU
Amey | Service is our passion. People, our strength
=20
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