In order to configure Mainboard hardware to measure voltage line to line a few connections must be set according to the map inside Inspector cover,

These connections are four external shorts; two external shorts are connected in the BEFORE_UPS section and also two other external shorts are connected in the AFTER_UPS section.

Switching Connector must be set between AC_IN and PH_E.

Neutral cable MUST NOT be used ever in this hardware configuration.

Use only the three lines and earth cables in the AFTER_UPS section.

Use only the three lines in the BEFORE_UPS section as shown.



DO NOT EVER USE NEUTRAL CABLE in line to line configuration. Connect Earth cable in one of its two Earth connector and DO NOT connect it in any other connector.