13-66
Testing and Maintenance
BE1-951
Table 13-104. Setting Group Change Example Accuracy Limits-Decreasing Current
Sensing
Type
Current Limit
Time
Comments
Low
High
1 A
1.224
1.176
5 min
SG3 (110% SG0 51P)
1.02
0.98
>1 min
Switch to SG2 (100% SG0 51P)
0.867
0.833
>1 min
Switch to SG1 (85% SG0 51P)
0.714
0.686
>1 min
Switch to SG0 (70% SG0 51P)
5 A
6.12
5.88
5 min
SG3 (110% SG0 51P)
5.1
4.9
>1 min
Switch to SG2 (100% SG0 51P)
4.335
4.165
>1 min
Switch to SG1 (85% SG0 51P)
3.57
3.43
>1 min
Switch to SG0 (70% SG0 51P)
Step 10 Remove the current from phase A, terminals D1 and D2.
Step 11 Using the RS-LGC command to retrieve logic variable data from the SER, verify that the following
actions were logged.
Verify that all setting group changes were logged.
Verify that VO1 went TRUE and closed relay output OUT1 when SG1 became the active setting
group.
Verify that VO2 went TRUE and closed relay output OUT2 when SG2 became the active setting
group and that relay output OUT1 opened.
Verify that VO3 went TRUE and closed relay output OUT3 when SG3 became the active setting
group and that relay output OUT2 opened.
Verify that when virtual switch 143 went TRUE (as a discrete input to the SG1 input of the setting
group logic block) but the active setting group remained SG3.
Verify the events that occurred in reverse order, when the current was being stepped down.
Manual Change - Mode 1
Manual Change Mode 1 test procedures are a continuation of the automatic test procedures. Do not change
the logic or settings except for those in Step 1 and subsequent.
Step 1
De-energize IN1 and verify that VO1 goes TRUE and closes OUT1 when SG1 becomes the active
setting group.
Step 2 Transmit the select and operate commands in Table 13-105 to the relay.
Table 13-105. Manual Setting Group Control Selection
Command
Purpose
A=
Gain write access
CS-143=0
Selects 143 for FALSE operation
CO-143=0
Executes 143 FALSE operation
CS-43=1
Selects 43 for TRUE operation
