Update on our Isolation Transformer challenges for connecting:
- US: 120v/240v 3-pole/4-wire 50-ampere/60Hz for use while in Europe
Victrons Isolation Transformers has a useful "feature" in that they increase output voltage by 10%. Useful in lower voltage situations.
We installed a Victron 7000w Isolation Transformer that feeds this increased voltage to an installed Victron Autotransformer 32 that steps down power to 2-legs of 120v using a common neutral generated by the Autotransformer.
Outside of the UK, or in lower voltage situations, this is fine. In the UK, where voltage is 240v and sometimes found at 250v, our power protection circuit (part of our orignal US gear) does not let shore power through to the ATS since it is measuring across legs 1&2 and coming up with 250+ volts.
Energy Shop (www.marine-energyshop.nl
) is building us essentially another stepdown transformer that will sit in between the Victron Isolation Transformer and the Victron Autotransformer. In UK voltage situations where incoming shore is 240 or more, it will stepdown the 10% increased voltage back to 240v. In lower voltage situations, mostly outside the UK, a switch will just pass the voltage straight through to utilize the increase provided by the Victron Isolation Transformer.
I am not sure many will come in contact with this challenge, but I post it just in case you find yourself encountering it. The solution means more gear
, more install and more weight, but also more heat, more air con and more comfort in a 50-amp environment
Our savior during this period has been the Mastervolt 100-amp 3-stage battery charger
that accepts shorepower from 95v-260v, along with a 4000w inverter
. Of course this meant less heat, less air con and less comfort.