Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Replies 4 replies
  • Subscribers 36 subscribers
  • Views 524 views
  • Users 0 members are here
Options
You may also be interested in

Central Battery System

Frankie 223

Hi all,
On a project we have a non-maintained Central Battery System which supplies power to some of the luminaires in the space. It has been noticed that the system will work only if there a power shutdown while the respective emergency light fittings will not operate in a local circuit failure. As this is against the standards, a proposal was made to install contactors after all lighting circuits CPD so when a circuit failure happens, all the EM lights will go on.
Do you know if there is any other more efficient way of dealing with this issue?
Many thanks

Parents
  • 0

    You will need to monitor each and every lighting circuit, or a % of lighting circuits in an open space to ensure adequate emergency lighting. Generally this is done using phase sensors at each lighting DB connected back to the CBS with a data cable. The tripping of an MCB would then force a programmed zone into an ON state. 

    Is this an AC/DC or an AC/AC system? I suspect the latter given the description. Generally with AC/AC systems, there are dual supplied luminaires with change over relays, with the backup supply live 24/7. This protects against local circuit failure as well as a general power failure. AC/DC systems have a single feed to the luminaire that provides AC during normal operation, and then DC during backup operation. 

    Do you have stand-alone dedicated emergencies or conversions? 

Reply
  • 0

    You will need to monitor each and every lighting circuit, or a % of lighting circuits in an open space to ensure adequate emergency lighting. Generally this is done using phase sensors at each lighting DB connected back to the CBS with a data cable. The tripping of an MCB would then force a programmed zone into an ON state. 

    Is this an AC/DC or an AC/AC system? I suspect the latter given the description. Generally with AC/AC systems, there are dual supplied luminaires with change over relays, with the backup supply live 24/7. This protects against local circuit failure as well as a general power failure. AC/DC systems have a single feed to the luminaire that provides AC during normal operation, and then DC during backup operation. 

    Do you have stand-alone dedicated emergencies or conversions? 

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines