Huawei DDSU666-H User Manual page 17

DDSU666-H Smart Power Sensor
User Manual
Fault phenomenon
Inaccurate for energy
metering
Contact the installation vendor if all failure analysis procedures listed above are completed and the fault
still exists.
Issue 01 (2018-05-18)
Factor analysis
1. Incorrect wiring, please
check whether the
corresponding phase
sequence of voltage and
current is correct.
2. Check whether the high
& low end of current
transformer inlet is
reversely connected.
Please observe the power
of Pa, Pb, Pc, to be
abnormal if any negative
values.
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3 System Maintenance
Elimination method
If the wiring mode is
incorrect, please connect
based on the correct wiring
mode (see the wiring
diagram).
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