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The firewall between adjecent transformers are made to prevent the other transformer from damage when one is going to catch fire or blast.If the distance between the transformers is as per guidlines of Standard code then sometimes there is no need of firewall.The safety of the person is other...

use a time delay relay and check the behaviour of any one breaker if not trip then o.k.check ur neutral connection also.

Just to get the understanding of the inrush phenomenon see the link: http://www.allaboutcircuits.com/vol_2/chpt_9/12.html The page explains the inrush phenomenon beautifully.