heat detectors for deluge spray and CO2 systems

[DavidCR]

Hello everybody there.

We need to specify the type of detectors that should be used as initiating device for fire protection systems on a hydroelectric power house, we have two cases:

1. The activation of water NFPA 15 deluge systems that protects power transformers located outdoors, the deluge valve is actuated by electric release, controlled by an electronic panel, in general I´ve seen that conventional heat detectors are used as initiating devices, but I don´t really know what type of detectors are recomended for this aplication.

2. A CO2 total flooding system for the generators pits or enclosures, I´ve seen that heat detectors are used but I would like also to know what type of detectors are recomended.

I´ve seen cases where heavy duty weather/Explosion proof heat detectors with dual action (fixed-temp and rate-of-rise) are used and other cases I´ve seen common heavy-duty, moisture proof fixed-temp detectors are used. So I don´t know what type detectors should be used, I don´t want to specify a costly detector if it isn´t really needed.

Also I´d appreciate if somebody can give more details on how to calculate the location and quantity of detectors needed or the temperature rating values for the outdoor transformer detector.

Thanks.

 

[rbulsara]

I would prefer conventional (not electronic) fixed temperature heat detectors wired direcly to a conventinoal zone ciruit of the CO2 control panel's smoke detectors zone(s).

This will provide a system which is least likely to create false alarms. You can monitor CO2 control panle's alarm/trouble contacts via a smart fire alarm system for notification but do not use smart detectors for CO2 (or any gaseous fire suppressions system)

 

[MJCronin]

david,

Are you aware that NFPA has a guideline that specifically addresses the Fire protection requirements of power plants ?

The guideline is NFPA-850, and it was based on an extensive, and well written EPRI report on the unique aspects of power plant fire protection.

http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=850&cookie_test=1

Hope that this helps...

MJC

 

[cdafd]

For question #1 have seen protectowire or equal used.

http://www.protectowire.com/