
Name
Values (Range)
Unit
Step
Default
Description
MultPU4
1.0 - 10.0
-
0.1
2.0
Multiplier for scaling the current setting value
for step 4
ResetTypeCrv4
Instantaneous
IEC Reset
ANSI reset
-
-
Instantaneous
Reset curve type for step 4
tReset4
0.000 - 60.000
s
0.001
0.020
Reset time delay for step 4
HarmRestrain4
Disabled
Enabled
-
-
Enabled
Enable block of step 4 from harmonic restrain
tPCrv4
0.005 - 3.000
-
0.001
1.000
Parameter P for customer programmable
curve for step 4
tACrv4
0.005 - 200.000
-
0.001
13.500
Parameter A for customer programmable
curve step 4
tBCrv4
0.00 - 20.00
-
0.01
0.00
Parameter B for customer programmable
curve for step 4
tCCrv4
0.1 - 10.0
-
0.1
1.0
Parameter C for customer programmable
curve step 4
tPRCrv4
0.005 - 3.000
-
0.001
0.500
Parameter PR for customer programmable
curve step 4
tTRCrv4
0.005 - 100.000
-
0.001
13.500
Parameter TR for customer programmable
curve step 4
tCRCrv4
0.1 - 10.0
-
0.1
1.0
Parameter CR for customer programmable
curve step 4
7.4.6
Technical data
Table 203:
EF4PTOC (51N/67N) technical data
Function
Range or value
Accuracy
Operate current
(1-2500)% of
lBase
±
1.0% of I
n
at I
<
I
n
±
1.0% of I at I > I
n
Reset ratio
> 95%
-
Operate current for directional
comparison
(1–100)% of
lBase
±
1.0% of I
n
Timers
(0.000-60.000) s
±
0.5%
±
10 ms
Inverse characteristics, see
and table
18 curve types
See table
Second harmonic restrain
operation
(5–100)% of fundamental
±
2.0% of I
n
Relay characteristic angle
(-180 to 180) degrees
±
2.0 degrees
Minimum polarizing voltage
(1–100)% of
VBase
±
0.5% of V
n
Minimum polarizing current
(1-30)% of
IBase
±
0.25 % of I
n
Real part of source Z used for
current polarization
(0.50-1000.00)
W
/phase
-
Table continues on next page
Section 7
1MRK505222-UUS C
Current protection
420
Technical reference manual
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