How to find the type of power connection (Top Feed/Bottom Feed) on MTZ Air Circuit Breakers from the Trip unit display screen ?
30 September 2021
Check the power sign on the Micrologic X display screen Home → Configuration → Network → Power sign.
. Circuit breakers with the active power flowing from upstream (top) to downstream (bottom) should be set with the power sign P+
. Circuit breakers with the active power flowing from downstream (bottom) to upstream (top) should be set with the power sign P-
The attached picture shows an example. Note : Micrologic X control unit will have P+ (Power from Top to Bottom) as default. If the installation is Bottom Feed, the settings should have been changed during commissioning. If not, the power values in Micrologic trip unit will display as negative values.