CT Lab Impedo DUO, Руководство пользователя

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Impedo DUO User Guide
34
Table 2: Voltage connection layout
Terminal Legend Description
1. V
1
Phase 1
2. V
2
Phase 2
3. V
3
Phase 3
4. V
com
Reference for V
1-3
5. V
4+
Phase 4
6. V
4-
Reference for V
4
A single 600 V
AC-RMS
voltage input range with 20 mV resolution simplifies installation
and ensures good accuracy for both the fundamental component and harmonics.
A high impedance input prevents the accidental shorting of VT inputs to system
ground and eliminates ground loops. Differential resistive inputs assure a safe, stable
analog input stage with minimum phase error, high bandwidth and zero temperature
drift.
2.4.4 Current Sensor Inputs
Each individual meter contains 4 galvanically isolated resistive current shunt inputs
with input impedance of 20 mΩ and a full-scale measurement range of 6 A
RMS
.
Resistive shunts provide excellent AC and DC response; zero offset drift and very low
temperature drift.
The 3-second over current withstand rating of each input is 50 A. The galvanic
isolation voltage between each channel and earth is 1 kV.
The current inputs are available on an 8-terminal lockable connector plug with screw
terminals for meter A and B as shown in Figure 12. Each terminal can accommodate
conductors with size up to 2.5mm
2
.