Transformer Fire prtoection
Transformer Fire prtoection
(OP)
Hi,
We have Oil filled transformer in cable cellar area part of our substation.
(Cable cellar: we mean that swithcgear has been kept at First floor level & on ground the cable layed & are terminated in switch gear)
Transformer are covered all the three side with 2 hr fire rated wall (including back side towards cable cellar area & other two side we have another transformer separated by fire wall) & front side fencing gate for ventilation.The Roof of this transformer are covered with sheated roof panel.
Following i need to discuss.
1. Is this transformer we will consider as outdoor or indoor based on above condtion
2. Does this required fire protection as water spray system for more than 500 gallon oil capacity.
We have Oil filled transformer in cable cellar area part of our substation.
(Cable cellar: we mean that swithcgear has been kept at First floor level & on ground the cable layed & are terminated in switch gear)
Transformer are covered all the three side with 2 hr fire rated wall (including back side towards cable cellar area & other two side we have another transformer separated by fire wall) & front side fencing gate for ventilation.The Roof of this transformer are covered with sheated roof panel.
Following i need to discuss.
1. Is this transformer we will consider as outdoor or indoor based on above condtion
2. Does this required fire protection as water spray system for more than 500 gallon oil capacity.





RE: Transformer Fire prtoection
RE: Transformer Fire prtoection
e.g we have 24 meter building the central part 18 meter we have concrete slab and 6 meter arms on both side for transformer bay.Hope this clarify your query,please find the attached sketch
RE: Transformer Fire prtoection
RE: Transformer Fire prtoection
RE: Transformer Fire prtoection
RE: Transformer Fire prtoection
RE: Transformer Fire prtoection
Ref. NFPA 850
7.8.6* Transformers. Oil-filled main, station service, and startup
transformers not meeting the separation or fire barrier
recommendations in 5.1.4 or as determined by the Fire Protection
Design Basis Document should be protected with automatic
water spray or foam-water spray systems.
7.8.7* Substations and Switchyards. Substations and switchyards
located at the generating facility and utilizing combustible
oil–filled equipment should be protected by the yard fire hydrant
system where practical. Spatial separation of transformers and
other equipment containing over 500 gal (1893 L) of oil should
be in accordance with 5.1.4. Consideration should be given to
water spray protection of transformers critical to the transmission
of the generated power.