Huawei DDSU666-H - Inaccurate for energy metering

DDSU666-H Smart Power Sensor
User Manual
3 System Maintenance
Issue 01 (2018-05-18)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
12
Fault phenomenon
Factor analysis
Elimination method
Inaccurate for energy
metering
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.
If the wiring mode is
incorrect, please connect
based on the correct wiring
mode (see the wiring
diagram).
Contact the installation vendor if all failure analysis procedures listed above are completed and the fault
still exists.