6.6
SEL-749M Relay Instruction Manual Date Code 20080918
Settings
Setting Entry Error Messages
Table 6.6 Setting Interdependency Error Messages
Error Message Setting /Function Correct the Condition
50P
mP • FLAn/CTRn must be
greater than or equal to
0.50 Amp
(for current rating 5 A)
(m = 1 or 2, n = 1 or 2)
Phase Overcurrent
and Main Settings
Modify the 50PmP (or FLAn/CTRn) to satisfy:
50P
m
P • (FLA
n
/CTR
n
)
≥
0.5 for phase input current rating of 5 A.
50PmP • FLAn/CTRn must be
greater than or equal to
0.10 Amp
(for current rating 1 A)
(m = 1 or 2, n = 1 or 2)
Phase Overcurrent
and Main Settings
Modify the 50PmP (or FLAn/CTRn) to satisfy:
50P
m
P • (FLA
n
/CTR
n
)
≥
0.1 for phase input current rating of 1 A.
50GmP is too low for FLAn,
CTR
n combination
(m = 1 or 2, n = 1 or 2)
Residual Overcurrent
and Main Settings
Modify the 50GmP (or FLAn/CTRn) to satisfy:
50G
m
P • (FLA
n
/CTR
n
) Š 0.5 for phase input current rating of 5 A.
50G
m
P • (FLA
n
/CTR
n
) Š 0.1 for phase input current rating of 1 A.
50NnP must be within (0.050
• CTRN) xx.xx and (10.0 •
CTRN) yy.yy
Neutral Overcurrent Modify the 50NnP (or CTRN) setting to satisfy the requirement
shown in the error message.
50NnP must be within (0.010
• CTRN) xx.xx and (2.0 •
CTRN) yy.yy
(n = 1 or 2)
Neutral Overcurrent Modify the 50NnP (or CTRN) setting to satisfy the requirement
shown in the error message.
Choose PRE from 1–10 cycles
Event Report
Settings
Modify the PRE setting to satisfy the requirement shown in the
error message.
CTRn,FLAn Setting Combina-
tion Out of Range
(n = 1 or 2)
Main Settings Modify the CTRn or FLAn setting to satisfy:
1.0 ≤ (FLAn/CTRn) ≤ 8 for phase input current rating of 5 A.
0.2 ≤ (FLAn/CTRn) ≤ 1.6 for phase input current rating of 1 A
Minimum STOP COOL TIME:
xxxx min
Thermal Overload Modify the COOLTIME setting to satisfy the requirement shown
in the error message.
Only one ambient RTD
allowed
(n = 1–12)
RTD Modify the RTD location setting (RTDnLOC) to satisfy the
requirement shown in the error message.
Output contacts cannot be
set to NA.
Output Contact
Logic Setting
Use 0, 1, or SELOGIC control equation for the logic setting.
PTR Setting Out of Range
Main Settings Modify VNOM or PTR setting to satisfy:
100 ≤ (VNOM/PTR) ≤ 250 for DELTA_Y := DELTA
100 ≤ (VNOM/PTR) ≤ 440 for DELTA_Y := WYE
Courtesy of NationalSwitchgear.com
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