• digital inputs and logic signals
• measured and pre-processed voltage magnitudes.
The function outputs the 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 signal. 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 a resettable cumulative counter for the START, TRIP and
BLOCKED events.
The following figure presents a simplified function block diagram of the sequence voltage function.
Figure. 5.3.13 - 140. Simplified function block diagram of the U1/U2>/< function.
Measured input
The function block uses analog voltage measurement values and always uses RMS values. A -20 ms
averaged value of the selected magnitude is used for pre-fault data registering.
Table. 5.3.13 - 122. Measurement inputs of the U1/U2>/< function.
Signal
Description
Time base
U
1
RMS
RMS measurement of voltage U
1
/V
5ms
U
2
RMS
RMS measurement of voltage U
2
/V
5ms
U
3
RMS
RMS measurement of voltage U
3
/V
5ms
A
AQ
Q-T215
-T215
Instruction manual
Version: 2.04
189
