Reset ratio
No hysteresis
Reset time
<40ms
9.2.1.9. Overvoltage (59) U>
Table. 9.2.1.9. - 270. Overvoltage (59) technical data
Input signals
Input magnitudes
P-P voltage fundamental frequency RMS
P-E voltage fundamental frequency RMS
Pick-up
Pick-up terms
1 voltage
2 voltages
3 voltages
Pick-up setting
50.00…150.00 %Un, setting step 0.01 %Un
Inaccuracy
-Voltage
±1.5 %U
SET
Operating time
De nite time function operating time setting
0.00…1800.00 s, setting step 0.005 s
Inaccuracy
-De nite Time (Um/Uset ratio 1.05
→
)
±1.0 % or ±35 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
Instant operation time
Start time and instant operation time (trip):
-Um/Uset ratio 1.05
→
<50 ms
Reset
Reset ratio
97 % of pick-up voltage setting
Reset time setting
Inaccuracy: Reset time
0.010 … 10.000 s, step 0.005 s
±1.0 % or ±45 ms
Instant reset time and start-up reset
<50 ms
9.2.1.10. Undervoltage (27) U<
Table. 9.2.1.10. - 271. Under voltage (27) technical data
Input signals
Input magnitudes
P-P voltage fundamental frequency RMS
P-E voltage fundamental frequency RMS
Pick-up
Pick-up terms
1 voltage
2 voltages
3 voltages
Pick-up setting
0.00…120.00 %Un, setting step 0.01 %Un
AQ-T257
Instruction manual
Version: 2.00
341
© Arcteq Relays Ltd
