I'm no EE but "power isolation" to me says transformer. Lots of ways to do this.
Before the panel, feeding it 240V, you could use a 240/480-120/240 shielded transformer in the 5 to 10 KVA range (40A minimum), for example:
http://www.ebay.ca/itm/NEW-ACME-10-KVA-1-P-Encapsulated-3R-Transformer-480D-240-120-/290692453455?pt=BI_Circuit_Breakers_Transformers&hash=item43ae9ed44f)
After the panel, you could use multiple smaller isolation transformers. For 115V in, Topaz, MGE and Phoenix brands are a popular way to go but can get expensive.
With the lights on the "other" leg of the 240V, no problem.
Before the panel, feeding it 240V, you could use a 240/480-120/240 shielded transformer in the 5 to 10 KVA range (40A minimum), for example:
http://www.ebay.ca/itm/NEW-ACME-10-KVA-1-P-Encapsulated-3R-Transformer-480D-240-120-/290692453455?pt=BI_Circuit_Breakers_Transformers&hash=item43ae9ed44f)
After the panel, you could use multiple smaller isolation transformers. For 115V in, Topaz, MGE and Phoenix brands are a popular way to go but can get expensive.
With the lights on the "other" leg of the 240V, no problem.