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Automatic water spray system on outdoor oil-insulated transformers for an electrical generating plant according to NFPA 850

Question asked by benadeau on Oct 25, 2018

When it is a requirement from the client of the electrical generating plant to use an automatic water spray system for the fire protection on outdoor power transformers, do you need to comply with spatial separation or firewalls indicated in the standard NFPA 850 art. or is that reduce the required spatial separation? As indicated at the article, we understand that the automatic water spray system is an other approved means for fire protection.