Schweitzer Engineering Laboratories SEL-751 - Table 4.12 A-, B-, and C-Phase Time-Overcurrent Settings

4.17
Date Code 20170927 Instruction Manual SEL-751 Relay
Protection and Logic Functions
Group Settings (SET Command)
Each element can be torque controlled through use of appropriate SELOGIC
control equations (e.g., when 51P1TC := IN401 the 51P1 element is opera-
tional only if IN401 is asserted).
Table 4.12 A-, B-, and C-Phase Time-Overcurrent Settings
Setting Prompt Setting Range
Setting Name :=
Fac to ry Default
TOC TRIP LVL OFF, 0.25–24.00 A
a
,
0.05–4.80 A
b
a
For I
NOM
= 5 A.
b
For I
NOM
= 1 A.
51AP := 6.00
51AP := 1.2
TOC CURVE SEL U1, U2, U3, U4, U5,
C1, C2, C3, C4, C5
51AC := U3
TOC TIME DIAL 0.50–15.00
c
,
0.01–1.50
d
c
For 51_C := U_.
d
For 51_C := C_.
51ATD := 3.00
EM RESET DELAY Y, N 51ARS := N
CONST TIME ADDER 0.00–1.00 sec 51ACT := 0.00
MIN RESPONSE TIM 0.00–1.00 51AMR := 0.00
TOC TRQ CONTROL SEL
OGIC 51ATC := 1
TOC TRIP LVL OFF, 0.25–24.00 A
a
,
0.05–4.80 A
b
51BP := 6.00
51BP := 1.2
TOC CURVE SEL U1, U2, U3, U4, U5,
C1, C2, C3, C4, C5
51BC := U3
TOC TIME DIAL 0.50–15.00
c
,
0.01–1.50
d
51BTD := 3.00
EM RESET DELAY Y, N 51BRS := N
CONST TIME ADDER 0.00–1.00 sec 51BCT := 0.00
MIN RESPONSE TIM 0.00–1.00 51BMR := 0.00
TOC TRQ CONTROL SEL
OGIC 51BTC := 1
TOC TRIP LVL OFF, 0.25–24.00 A
a
,
0.05–4.80 A
b
51CP := 6.00
51CP := 1.2
TOC CURVE SEL U1, U2, U3, U4, U5,
C1, C2, C3, C4, C5
51CC := U3
TOC TIME DIAL51_C 0.50–15.00
c
,
0.01–1.50
d
51CTD := 3.00
EM RESET DELAY Y, N 51CRS := N
CONST TIME ADDER 0.00–1.00 sec 51CCT := 0.00
MIN RESPONSE TIM 0.00–1.00 51CMR := 0.00
TOC TRQ CONTROL SEL
OGIC 51CTC := 1