Rockwell Automation 865 Differential Protection Relay - Manual (Page 21)

Local Panel User Interface 2-9
865-UM001A-EN-P – July 2009
Menu Structure of Protection Functions
The general structure of all protection function menus is similar
although the details do differ from stage to stage. As an example the
details of the second overcurrent stage I>> menus are shown below:
F
IRST MENU OF
I>> 50/51
STAGE
I>> STATUS 50/51
Status
SCntr
TCntr
SetGrp
SGrpDI
Force -
5
2
1
-
Off
ExDO
Prot
I>
Iv>
I >
j
I>>
Figure 2.8 – First Menu of I>>50/51 Stage
This is the status, start and trip counter and setting group menu. The
content is:
•
Status – The stage is not detecting any fault at the moment. The
stage can also be forced to pick-up or trip if the operating level is
"Configurator" and the force flag below is on. Operating levels
are explained in section “Operating Levels”.
• SCntr 5 – The stage has picked-up a fault five times since the
last reset of restart. This value can be cleared if the operating
level is at least "Operator".
• TCntr 1 – The stage has tripped two times since the last reset of
restart. This value can be cleared if the operating level is at least
"Operator".
• SetGrp 1 – The active setting group is one. This value can be
edited if the operating level is at least “Operator”. Setting groups
are explained in section “Setting Groups”.
• SGrpDI – The setting group is not controlled by any digital
input. This value can be edited if the operating level is at least
“Configurator”.
• Force Off – The status forcing and output relay forcing is
disabled. This force flag status can be set to “On” or back to
“Off” if the operating level is at least “Configurator”. If no front
panel button is pressed within five minutes and there is no
SetPointPS communication, the force flag will be set to “Off”
position. The forcing is explained in section “Forced Control
(Force)”.