Impedo
DUO
User Guide
14
2.3
Instrument Overview
2.3.1
Key Features
The Impedo DUO has two independent IEC 61000-4-30 Class A meters in one
instrument with both voltages and currents for two 3-phase feeders.
1.
Voltage inputs x 2:
Class A performance over all of the input range inclusive of 63.5 V (if L-
N measurements are done in a 110 V line-line VT circuit)
6 terminals are used for 4 voltage input channels with maximum input
ratings of 600 V.
o
The first 4 terminals connect 3 different phase voltages such as in a
3-phase system.
o
Input channel 1-3 is referenced to a neutral (4
th
terminal)
connection. This 4
th
terminal acts as a reference channel and can be
any phase voltage if a 3-phase line-line voltage circuit is measured.
o
If it is a 3-phase line-neutral voltage circuit, then the 4
th
terminal
will be connected to the neutral voltage.
o
The 5
th
and 6
th
terminal is the 4
th
channel and a fully differential (2
terminal) input channel.
2.
Current inputs x 2:
4 X 1/5 A CT inputs; and
4 X 1 V
rms
differential current transducer inputs
3.
Digital Outputs two sets:
3 X Switched outputs with 1 common
4.
Digitisation of input signals
500 kHz sampling of primary input signals.
50 kHz is digitally retained and subjected to the IEC 61000-4-30 Class A
signal processing requirements.
5.
Power supply
PoE and/or a 90-300 V AC/DC power factor corrected power supply.
Summary of Contents for Impedo DUO
Page 85: ...Impedo DUO User Guide 85 Figure 49 Export harmonic selection...
Page 109: ...Impedo DUO User Guide 109 Appendices 8 Impedo DUO dimensions...
Page 110: ...Impedo DUO User Guide 110 8 1 Panel mounting plates 8 2 19 installation plate...
Page 111: ...Impedo DUO User Guide 111 9 Impedo DUO wiring diagram...
Page 113: ...Impedo DUO User Guide 113 11 Portable ImpedoDUO...
Page 117: ...Impedo DUO User Guide 117 Screw driver USB with meter key Ethernet cable...
