The function's outputs are CTS ALARM 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 output signals. The time stamp resolution is 1 ms. The
function also provides a resettable cumulative counter for the CTS ALARM and BLOCKED events.
The following figure presents a simplified function block diagram of the current transformer supervision
function.
Figure. 5.6.1 - 191. Simplified function block diagram of the CTS function.
Measured input
The function block uses analog current measurement values, the RMS magnitude of the current
measurement inputs, and the calculated positive and negative sequence currents. The user can select
what is used for the residual current measurement: nothing, the I01 RMS measurement, or the I02
RMS measurement.
A
AQ
Q-M257
-M257
Instruction manual
Version: 2.07
© Arcteq Relays Ltd
IM00021
367
Summary of Contents for AQ-M257
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