XITRON XT2640, Operating Manual

Page: 25 / 187

XT2640 Operating Manual 13 July 2016 Page 25 of 187
9.6 3Ø3W(3CH) OR 3Ø4W WIRING USING INTERNAL CURRENT MEASUREMENT
CAUTION:

FOR USE WITH SH, SD, AH, AD, LH, LD, WH OR WD CHANNELS ONLY

DO NOT CONNECT WIRING WHILE VOLTAGE PRESENT.

ENSURE WIRING IS CORRECT BEFORE APPLYING VOLTAGE.
 DO NOT PASS LOAD CURRENT >2Arms WITH THE XT2640 TURNED OFF.
WIRING:
 Thicker connections are current carrying. Ensure wire used is rated for the maximum voltage and current to be
encountered.

Thinner connections are not current carrying. Ensure wire used is rated for the maximum voltage to be encountered.

Phases are shown for descriptive purposes, the XT2640 places no reliance on the actual phasing however using those
shown ensures that the XT2640 display matches the actual phasing if the channels have increasing channel numbers from
left to right in the diagram above.
 The wiring connections shown above ensure the best overall system accuracy in most circumstances, measuring the
voltage at the source and the load current. For applications requiring accurate measurements of the power to the load and
using low voltages (<50V) and high currents (>1A) change the RED V+ terminal connections to that of the respective BLUE
A‐ terminal instead of the YELLOW A+ terminal shown above, this ensures that the voltage drop across the A terminals does
not affect the V measurement, at the expense of the current and power measurements including the current and power
drawn by the V input (which may be adjusted for by using the ADJUST setting in the MEAS CONFIG screen).
XT2640 CONFIGURATION:

In the XT2640 MEAS CONFIG menu you should set SCALE for the channels to OFF.

For either connection method you may use the ADJUST setting in the MEAS CONFIG menu to set the XT2640 to adjust the
signals for the connection method and whether source or load results are required.
A
V
XT2640
CH
øA
From
SOURCE
N
From
SOURCE
øA
To
LOAD
A
V
XT2640
CH
øB
From
SOURCE
øB
To
LOAD
A
V
XT2640
CH
øC
From
SOURCE
øC
To
LOAD
N
To
LOAD
For 3ø3w(3ch) only
Each V- terminal is connected together as shown but there is no N
SOURCE or LOAD connection. The V- terminals may optionally be
grounded