8.4. Voltage measurement module
Figure. 8.4. - 179. Voltage measurement module
Connector
Description
VTM 1-2
Con gurable voltage measurement input U1
VTM 3-4
Con gurable voltage measurement input U2
VTM 5-6
Con gurable voltage measurement input U3
VTM 7-8
Con gurable voltage measurement input U4
Basic four channel voltage measurement module includes four freely con gurable voltage
measurement inputs.
Voltage measurement module is connected to secondary side of conventional voltage transformers
(VTs) or directly to low voltage systems secured by fuses. Nominal dimensioning voltage can be 100…
400 V. Voltages are calibrated in range of 0…240 V which provide ± 0.2% inaccuracy in same range.
Voltage input characteristics are as follows:
Measurement range
Per channel 0…480 V
Angle measurement accuracy less than ± 0.5 degrees within nominal range.
Frequency measurement range of the voltage inputs is in range from 6 Hz to 1800 Hz with
standard hardware.
Quantization of the measurement signal is applied with 18 bit AD converters and the sample
rate of the signal shall be 64 samples / power cycle in system frequency range of 6 Hz to 75 Hz.
For further details refer to the “Technical data” section of this document.
AQ-T257
Instruction manual
Version: 2.00
© Arcteq Relays Ltd
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