Input magnitudes
Residual current fundamental freq RMS
Residual current TRMS
Residual current peak-to-peak
Pick-up
Used magnitude
Measured residual current I01 (1 A)
Measured residual current I02 (0.2 A)
Calculated residual current I0Calc (5 A)
Pick-up current setting
0.0001…40.00 x In, setting step 0.0001 x In
Inaccuracy
-Starting I01 (1 A)
-Starting I02 (0.2 A)
-Starting I0Calc (5 A)
±0.5 %I0
SET
or ±3 mA (0.005…10.0 x I
SET
)
±1.5 %I0
SET
or ±1.0 mA (0.005…25.0 x I
SET
)
±1.0 %I0
SET
or ±15 mA (0.005…4.0 x I
SET
)
Operating time
De nite time function operating time setting
0.00…1800.00 s, setting step 0.005 s
Inaccuracy
-De nite Time (Im/Iset ratio > 3)
-De nite Time (Im/Iset ratio 1.05…3)
±1.0 % or ±20 ms
±1.0 % or ±30 ms
IDMT operating time setting (ANSI / IEC)
0.02…1800.00 s, setting step 0.001 x parameter
IDMT setting parameters
k Time dial setting for IDMT
A IDMT Constant
B IDMT Constant
C IDMT Constant
0.01…25.00 step 0.01
0…250.0000 step 0.0001
0…5.0000 step 0.0001
0…250.0000 step 0.0001
Inaccuracy
-IDMT operating time
-IDMT minimum operating time; 20 ms
±1.5 % or ±20 ms
±20 ms
Retardation time (overshoot)
<25 ms
Instant operation time
Start time and instant operation time (trip):
(Im/Iset ratio > 3.5)
(Im/Iset ratio 1.05…3.5)
<50 ms (typical 35 ms)
<55 ms
Reset
Reset ratio
97 % of pick-up current setting
Reset time setting
Inaccuracy: Reset time
0.010 … 10.000 s, step 0.005 s
±1.0 % or ±50 ms
Instant reset time and start-up reset
<50 ms
Note!
Operation and reset time accuracy won’t apply with 1…20mA measured primary current when
I02 channel is used. Pick-up is tuned more sensitive and operation times will vary due to this.
9.2.1.3. Directional overcurrent (67) Idir>
Table. 9.2.1.3. - 281. Directional overcurrent (67) technical data
Input signals
Input magnitudes
Phase current fundamental freq RMS
Phase current TRMS
Phase current peak-to-peak
P-P +U
0
voltage fundamental frequency RMS
P-E voltage fundamental frequency RMS
Pick-up
Characteristic direction
Directional, Non-directional
AQ-F255
Instruction manual
Version: 2.00
345
© Arcteq Relays Ltd
