Good morning, I have a project with a 60MVA outdoor transformer. We have a deluge valve system with wet pilot trim.
Is there a standard requirement for protecting the transformer regarding k-factor, coverage area, and distances for a sprinkler/nozzle from the transformer? Submitted anonymously and posted for discussion. Discuss This | Submit Your Question | Subscribe
4 Comments
Dan Wilder
7/23/2020 09:46:43 am
NFPA 850 gives guidance along with FM Global Standard 5-4. Nozzles are MFG specific as to angle of spray, surface area coverage, and effective reach (based on the angle of the angle of the nozzle). K-Factor isn't as much an issue other than ease of use in the field and refining calcs to prevent over discharge. The pilot line has some requirements as well so don't forget it when you start laying out pipe stands.
Reply
franck
7/23/2020 10:56:07 am
As indicated by Dan, no specific requirement for K factor.
Reply
Mike
7/23/2020 04:51:49 pm
NFPA 15 provides density, application rate drainage requirements.
Reply
MHK
7/23/2020 05:58:57 pm
The Viking's water spray system design manual also includes some information of the water spray system design for transformers.
Reply
Leave a Reply. |
Free SignupSubscribe and learn something new each day:
CommunityThank You to Our Top
January '21 Contributors!
Your PostThe ToolkitSprinkler Designer or Engineer?
Get all of our tools, including the Sprinkler Database, Friction Loss Calculator, Fire Pump Analyzer and more: Filters
All
Archives
March 2021
Daily
Daily discussions are open-ended fire protection, fire alarm, and life safety questions submitted anonymously for the benefit of sharing expertise and learning from other perspectives. Anyone can submit a question here:
Exam Prep2020 PE Prep Guide
(Available Now!) PE Prep Series
(Available Now!) 2020 PE Prep Series
Current Leaderboard (Click to enlarge) PE Problems
Visit July-October for daily Fire Protection PE Exam sample questions.
Solutions are posted the day after posting. Comment with your solutions, questions or clarifications. Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves. |