T&T: Battery Chargers & Inverters

[Peter Bennett]

Tuesday, July 21, 2009, 6:02:08 AM, Scott wrote:

SHEW> "Jim Healy" <gilwellbear at gmail.com> writes:
>>I'm not where I can get at my standards, so I can't check this out right
>>now.  I do not believe it's a correct interpretation, since transformers can
>>and do short internally, and they are located in the end attachment part of
>>the distribution system, where by definition, there can't be two sources.  

SHEW> Remember, an isolation transformer is a "load" to shore power (the primary wi
SHEW> nding) and a "source" to the boat (the secondary winding). Hence the AC neutr
SHEW> al should be bonded to the AC ground on the secondary side of the isolation t
SHEW> ransformer.

SHEW> Scott Welch
SHEW> Product Manager, Open Text Collaboration and Social Media Group
SHEW> www.opentext.com
SHEW> 905 762 6101

To clarify:

The shore-side AC neutral is only connected to one side of the
transformer primary, and _not_ to vessel ground.

The on-board neutral and on-board ground are connected to one
secondary terminal of the transformer and to vessel ground.

-- 
Peter Bennett, VE7CEI    Vancouver, B.C., Canada
Ennos 31 "Honeycomb"
GPS and NMEA info: http://vancouver-webpages.com/peter 
Vancouver Power Squadron: http://vancouver.powersquadron.ca