8.4 Voltage measurement module
Figure. 8.4 - 189. Voltage measurement module.
Connector
Description
X 1-2-3
Configurable voltage measurement inputs U1 and U2.
X 4-5
Configurable voltage measurement input U3.
X 6
Digital input 3
X 7
Digital input 4
X 8
Digital input 5
X 9
Digital input 6
X 10
Common earthing for the digital inputs 3…6.
The three-channel voltage measurement module has three voltage measurement inputs that can be
configured freely. It also has four digital inputs. As the main processor module comes with two digital
inputs, the first digital input in the voltage measurement module is designated "DI3".
The voltage measurement module is connected to the secondary side of conventional
voltage transformers (VTs) or directly to low-voltage systems ecured by fuses. The nominal voltage can
be set between 0.2…120.0 V. Voltages are calibrated in a range of 0…250 V, which provides ± 1 %
inaccuracy in the same range.
The voltage input characteristics are as follows:
• The measurement range is 1…250 V per channel.
• The angle measurement inaccuracy is less than ± 1.0 degrees within the nominal range.
• The frequency measurement range of the voltage 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 "Voltage measurement" chapter in the “Technical data” section of
this document.
A
AQ
Q-C213
-C213
Instruction manual
Version: 2.04
314
Содержание AQ-C213
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