Definite time function operating
time setting
0.00…1800.00 s, setting step 0.005 s
Inaccuracy:
- Definite time (P
M
/P
SET
ratio
1.05
→
)
±1.0 % or ±35 ms
Instant operation time
Start time and instant operation
time (trip):
- PQS
M
/PQS
SET
ratio 1.05
→
<40 ms
Reset
Reset ratio
97 or 103 %P
SET
Instant reset time and start-up
reset
<40 ms
No
Notte!
e!
• The voltage measurement starts from 0.5 V and the current measurement from 25 mA. In
case either or both are missing, the measured magnitude is forced to 0 MW/MVar/MVA.
Please avoid using settings that should operate below the relay's current squelch limit (25 mA
on the relay terminal).
• With very small under power pick-up settings time delay inaccuracy might double.
9.2.1.17 Motor start/ locked rotor monitoring (Ist>; 48/14)
Table. 9.2.1.17 - 340. Technical data for the motor start/locked rotor monitoring function.
Measurement inputs
Current inputs
Phase current inputs: I
L1
(A), I
L2
(B), I
L3
(C)
Current input magnitudes
RMS phase currents
Pick-up
Pick-up current setting
0.10…40.00 × I
N
, setting step 0.10 × I
N
Inaccuracy:
- Current
±0.5 %I
SET
or ±15 mA (0.10…4.0 × I
SET
)
Time settings
Starting time setting
0.00…1800.00 s, setting step 0.005 s
Operating mode
Definite time or cumulative I2t sum inverse operating time
With or without a speed switch input
Monitors only starts or both starts and stall
Start time
Max. 5 ms from the detected start-up or locked rotor situation
Inaccuracy:
- Starting
- Definite time operating time
±3% of the set pick-up value > 0.5 × I
N
setting. 5 mA < 0.5 × I
N
setting
±0.5 % or ±10 ms
Operation time
Definite time function operating time setting
0.00…1800.00 s, setting step 0.005 s
Cumulative I2t sum inverse operation time
0.00…1800.00 s, setting step 0.005 s
Inaccuracy:
- Definite time (I
M
/I
SET
ratio 0.95)
±1.0 % or ±40 ms
Instant operation time
Start time and instant operation time (trip):
- I
M
/I
SET
ratio 1.05
→
<55 ms
A
AQ
Q-M255
-M255
Instruction manual
Version: 2.06
© Arcteq Relays Ltd
IM00020
427
Содержание AQ-M255
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Страница 384: ...Figure 7 4 189 Example block scheme A AQ Q M255 M255 Instruction manual Version 2 06 382 Arcteq Relays Ltd IM00020...
Страница 405: ...Figure 8 14 211 Device installation A AQ Q M255 M255 Instruction manual Version 2 06 Arcteq Relays Ltd IM00020 403...