Arcteq AQ-M255, Инструкция по эксплуатации

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• output processing.
The inputs for the function are the following:
• operating mode selections
• setting parameters
• digital inputs and logic signals
• measured and pre-processed voltage magnitudes.
The function's outputs are START, TRIP and BLOCKED signals which can be used for direct I/O
controlling and user logic programming. The function generates general time-stamped ON/OFF events
to the common event buffer from each of the three (3) output signals. In the instant operating mode the
function outputs START and TRIP events simultaneously with an equivalent time stamp. The time stamp
resolution is 1 ms. The function also provides a resettable cumulative counter for the START, TRIP and
BLOCKED events.
The following figure presents a simplified function block diagram of the undervoltage function.
Figure. 5.3.11 - 73. Simplified function block diagram of the U< function.
Measured input
The function block uses analog voltage measurement values. The monitored voltage magnitudes
are equal to RMS values. A -20 ms averaged value of the selected magnitude is used for pre-fault data
registering.
Table. 5.3.11 - 111. Measurement inputs of the U< function.
Signal Description Time base
U
L12
RMS RMS measurement of voltage U
L12
/V 5ms
U
L23
RMS RMS measurement of voltage U
L23
/V
5ms
U
L31
RMS RMS measurement of voltage U
L31
/V
5ms
U
L1
RMS RMS measurement of voltage U
L1
/V 5ms
U
L2
RMS RMS measurement of voltage U
L2
/V 5ms
U
L3
RMS RMS measurement of voltage U
L3
/V
5ms
A AQ Q-M255 -M255
Instruction manual
Version: 2.06
138 © Arcteq Relays Ltd
IM00020