Ch
dig
= the number of digital channels recorded.
For example, let us say the nominal frequency is 50 Hz, the selected sample rate is 64 s/c, nine (9)
analog channels and two (2) digital channels record. The calculation is as follows:
Therefore, the maximum recording length in our example is approximately 496 seconds.
Application example
This chapter presents an application example of how to set the disturbance recorder and analyze its
output. The recorder is con gured by using the AQtivate software or relay HMI, and the results are
analyzed with the AQviewer software (is automatically downloaded and installed with
AQtivate). Registered users can download the latest tools from the Arcteq website
(
).
In this example, we want the recordings to be made according to the following speci cations:
the recording length is 1.0 s
the sample rate is 64 s/c (therefore, with a 50 Hz system frequency a sample is taken every
312.5 µs)
the analog channels 1...8 are used
digital channels are tracked every 5 ms
the rst activation of the overcurrent stage trip (I> TRIP) triggers the recorder
the pre-triggering time is 200 ms (ie. how long is recorded before the I> TRIP signal) and the
post-triggering time is 800 ms
The image below shows how these settings are placed in AQtivate.
AQ-E215
Instruction manual
Version: 2.01
© Arcteq Relays Ltd
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