Inaccuracy:
- IDMT operating time
- IDMT minimum operating time
±1.5 % or ±20 ms
±20 ms
Instant operation time
Start time and instant operation time (trip):
- U
M
/U
SET
ratio 1.05
→
<50 ms
Reset
Reset ratio
97 % of the 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 protection (U<; 27)
Table. 9.2.1.10 - 407. Technical data for the undervoltage function.
Measurement inputs
Voltage inputs
U
L1
, U
L2
, U
L3
U
L12
, U
L23
, U
L31
(+ U
0
)
Voltage input magnitudes
RMS line-to-line or line-to-neutral voltages
Pick-up
Pick-up terms
1 voltage
2 voltages
3 voltages
Pick-up setting
0.00…120.00 %U
N
, setting step 0.01 %U
N
Inaccuracy:
- Voltage
±1.5 %U
SET
or ±30 mV
Low voltage block
Pick-up setting
0.00…80.00 %U
N
, setting step 0.01 %U
N
Inaccuracy:
- Voltage
±1.5 %U
SET
or ±30 mV
Operation time
Definite time function operating time setting
0.00…1800.00 s, setting step 0.005 s
Inaccuracy:
- Definite time (U
M
/U
SET
ratio 1.05
→
)
±1.0 % or ±35 ms
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
±1.5 % or ±20 ms
±20 ms
Instant operation time
Start time and instant operation time (trip):
- U
M
/U
SET
ratio 1.05
→
<65 ms
Retardation time (overshoot)
<30 ms
Reset
Reset ratio
103 % of the pick-up voltage setting
A
AQ
Q-M257
-M257
Instruction manual
Version: 2.07
© Arcteq Relays Ltd
IM00021
487
Summary of Contents for AQ-M257
Page 1: ...AQ M257 Motor protection IED Instruction manual...
Page 2: ......
