Why use Isolation transformer in automotive application?

Question

question

amartins asked Jan 11, '19

Why use Isolation transformer in automotive application?

From a Victron video on installing a solar on a van [1], in their setup they use a isolation transformer to connect the shore power to the inverter.

In what scenario this is usefull or required?

Thank you.

[1] Victron VW Van Electrics Install - Episode 1 Solar [link]

Isolation Tranformer

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Modifications Space

Node Red Space

Answer 1 · 2019-01-11T16:24:36Z

wkirby answered · Jan 11, 2019 at 04:24 PM

This is so that the van can use it's own earth system even if it is connected to shore power.

2

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

amartins commented · Jan 11, 2019 at 04:53 PM

Why should I want to have a separeted earth system on a van?

0 ·

wkirby ♦♦ amartins commented · Jan 11, 2019 at 06:16 PM

Once the van is plugged in to shore power then the MultiPlus N-E relay is open. Now your earth reference is no longer local on the van but it is back down the power line somewhere wherever the N-E bond is, it might be far away.
Also, if you use a floating generator without a N-E bond then you are isolated from that and you still have a reliable earth reference inside the van.

1 ·

question