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PRELIMINARY TECHNICAL DATA
EVAL-ADE7758EB
SETTING UP THE EVALUATION BOARD AS AN
ENERGY METER
Figure 4 shows a typical set up for the ADE7758 evaluation
board. In this example a kWh meter for a 4 wire, three phase
distribution system is shown. Current Transformers are used
to sense phases' current and are connected as shown in Figure
4. For a more detailed description on how to use a CT as a
current transducer see the Current Sense Inputs section of this
documentation. The line voltage is connected directly to the
evaluation board as shown. Note JP23, JP24 and JP25 should
be left open to ensure that the attenuation networks are not
bypassed. Also note the use of two power supplies.
The second power supply is used to power the optical
isolation. With JP26 left open, this will ensure that there is no
electrical connection between the high voltage test circuit and
the frequencies outputs. The power supplies should have
floating voltage outputs.
Setting up the evaluation board for the ADE7758
The configuration of the jumpers on the ADE7758 evaluation
board for operation with the ADE7758 is detailed in Figure
4.
The evaluation board is connected to the PC parallel port
using the cable supplied. The cable length should not
exceed 6 feets (2 meters) or the serial communication
between the PC and the evaluation board may become
unpredictable and error prone.
When the evaluation board has been powered up and is
connected to the PC, the supplied software can be
launched. The software will automatically start in default
mode. The next section describes the ADE7758 evalu-
ation software in detail and how it can be installed and
uninstalled.
5.000 V
-
+
5.000 V
-
+
Phase C
Source
Phase A
Phase B
P4
JP19 = CLOSED
JP20 = OPEN
JP21 = CLOSED
JP22 = CLOSED
IAP
JP1 = CLOSED
P10
P2
SH1A
JP2 = OPEN
JP3 = OPEN
JP4 = CLOSED
P5
SH2A
SH1B
IAN
IBP
JP5 = OPEN
JP6 = OPEN
JP7 = CLOSED
JP8 = OPEN
JP9 = OPEN
JP10 = CLOSED
P6
SH2B
SH1C
SH2C
IBN
ICP
ICN
JP11 = OPEN
JP12 = OPEN
JP13 = CLOSED
JP14 = OPEN
JP15 = OPEN
JP16 = CLOSED
JP17 = OPEN
P9 = RIGHT
To PC
Parallel Port
JP18 = OPEN
P8
JP27
R40
C1
JP32
VN
JP27 = OPEN
JP28 = CLOSED
JP32 = CLOSED
JP23
P11
R41
R42
C2
VCP
JP23 = OPEN
JP29 = OPEN
JP47 = CLOSED
R43 = 1k ?
JP47
JP24
P7
R45
R46
C3
JP48
VBP
JP24 = OPEN
JP35 = OPEN
JP48 = CLOSED
R44 = 1k ?
JP25
R48
R49
C4
JP25 = OPEN
JP38 = OPEN
Load
JP49
VAP
JP49 = CLOSED
R47 = 1k ?
NEUTRAL
REV. PrB 08/03
Figure 4 - Typical set up for the ADE7754-ADE7758 evaluation board
–5–
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