Technical Guide P12y/EN FT/D22
User Guide
MiCOM P125/P126/P127 Page 3/108
1. INTRODUCTION
MiCOM P125, P126 & P127 are fully numerical relays designed to perform electrical
protection and control functions.
The following sections describe content and structure of the menu.
The five keys situated in the middle of the MiCOM relay front panel are dedicated to
set parameters.
With the keys 8 2 4 6 it is possible to move in the direction indicated to the various
levels of the menus.
The key 5 validates a choice or value (modification of settings).
The two keys 0 and 1 are dedicated to acknowledging/clearing and
displaying/reading of data. For example if successive alarms are to be displayed,
press on key 1.
The alarms are presented in reverse order of their detection (the most recent alarm
first, the oldest last). The user can either acknowledge and clear each alarm from the
LCD by using 0 or go to the end of the ALARM menu and carry out a general
acknowledgement.
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