Sel 421 - Figure 4.10 Relay Settings Structure Overview

U.4.14
SEL-421 Relay User’s Guide Date Code 20090715
Basic Relay Operations
Making Simple Settings Changes
Settings Structure
The SEL-421 settings structure assigns each relay setting to a specific location
based on the setting type. A top-down organization allocates relay settings
into these layers:
➤ Class
➤ Instance
➤ Category
➤ Setting
Examine Figure 4.10 to understand the settings structure in the SEL-421. The
top layer of the settings structure contains classes and instances. Class is the
primary sort level; all classes have at least one instance, and some classes have
multiple instances. Settings classes and related instances for the SEL-421 are
listed in Table 4.5.
Figure 4.10 Relay Settings Structure Overview
Class
Instance
Category
Category
Category
Setting
Setting
Setting
Global
Settings
General
Group
Settings
Group 1
Line Config.
Group 2
CTRWCTRW
CTRX
CTRX
PTRY
Line Config.
Relay Config. Relay Config.
PTRY
SID
RID
NUMBK
E21PE21P
E21MG
E21MG
E21XGE21XG
Enables
EDCMON
EICIS
EDRSTC
DC1 Mon
DC1LFP
DC1LWP
Setting
Mho Phase
Dist.
Mho Phase
Dist.
Z1PZ1P
Z2P
Z2P
SettingSetting
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