Schweitzer Engineering Laboratories SEL-321 - Global Input Settings; Settings Sheet for SEL-321 Relay Setting Example

5-26 Applications Date Code 20011026
SEL-321/321-1 Instruction Manual
Global Input Settings
The eight logic inputs may be assigned to any of the variables listed in Table 2.9. in Section 2:
Specifications. For our example, the relay logic requires a 52A input, the received permissive
trip signal, the breaker close signal and an indication from the potential transfer switch.
Miscellaneous Global Settings
Settings are also required for the front panel timeout and the group switching delay.
The front panel timeout defines a time duration in which the relay takes certain actions if no
activity occurs via the front panel after the set time period. The actions taken are as follows:
• The front panel LCD display is reset to the default display.
• The front panel access level reverts to Access Level 1.
• The back lighting for the LCD is turned off.
• Any routine that is being executed via a front panel command is interrupted.
• Target LEDs revert to the default targets.
The factory default setting is five minutes. The setting range is from 0 to 30 minutes.
The group switching delay defines a time interval in which the relay delays switch group setting
via logic input assertion.
IN1 = 52A1
52A152A1
52A1
IN2 = PT
PTPT
PT
IN3 = CLOSE
CLOSECLOSE
CLOSE
IN4 = NA
NANA
NA
IN5 = NA
NANA
NA
IN6 = NA
NANA
NA
IN7 = NA
NANA
NA
IN8 = PTXFR
PTXFRPTXFR
PTXFR
RMB1 = NA
NANA
NA
RMB2 = NA
NANA
NA
RMB3 = NA
NANA
NA
RMB4 = NA
NANA
NA
RMB5 = NA
NANA
NA
RMB6 = NA
NANA
NA
RMB7 = NA
NANA
NA
RMB8 = NA
NANA
NA
FP_TIMEOUT = 5
55
5
TGR = 5
55
5
SETTINGS SHEET FOR SEL-321 RELAY SETTING EXAMPLE
Following is a filled out example setting sheet for this application.