Arcteq AQ-T256, Инструкция по эксплуатации

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The current measurement module is connected to the secondary side of conventional current
transformers (CTs). The nominal current for the phase current inputs is 5 A. The input nominal current
can be scaled for secondary currents of 1…10 A. The secondary currents are calibrated to nominal
currents of 1 A and 5 A, which provide ±0.5 % inaccuracy when the range is 0.005…4 × I
n
.
The measurement ranges are as follows:
• Phase currents 25 mA…250 A (RMS)
• Coarse residual current 5 mA…150 A (RMS)
• Fine residual current 1 mA…75 A (RMS)
The characteristics of phase current inputs are as follows:
• The angle measurement inaccuracy is less than ± 0.2 degrees with nominal current.
• The frequency measurement range of the phase current inputs is 6…1800 Hz with standard
hardware.
• The quantization of the measurement signal is applied with 18-bit AD converters, and the
sample rate of the signal is 64 samples/cycle when the system frequency ranges from 6 Hz to
75 Hz.
For further details please refer to the "Current measurement" chapter in the “Technical data” section of
this document.
8.4 Digital input module (optional)
Figure. 8.4 - 126. Digital input module (DI8) with eight add-on digital inputs.
Connector
Description (x = the number of digital inputs in other modules that preceed this one in the
configuration)
X 1 DIx + 1
X 2 DIx + 2
X 3 DIx + 3
X 4 DIx + 4
X 5 Common earthing for the first four digital inputs.
X 6 DIx + 5
A AQ Q-T256 -T256
Instruction manual
Version: 2.06
© Arcteq Relays Ltd
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