I had a query regarding the interpretation of IEEE-979 requirements when it comes to the provision of the firewalls between transformers (XFR). The subject code recommends minimum separation and firewall requirements between big XFR, i.e. containing more than 7570 litters of insulating oil, and buildings, small XFR and buildings, and between adjacent big XFRs. It doesn?t address separation or firewall requirements between a small XFR and big XFR, nor between two small XFRs. The lack of such requirements had been interpreted as if firewalls are not required between two adjacent small transformers, or between small and big transformers! Is this the intention? Can someone advice.
Jaber Al-Haji
Fire Prevention Engineer
Jaber Al-Haji
Fire Prevention Engineer