Name: Huawei DDSU666-H
Brand: Huawei
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DDSU666-H Smart Power Sensor

User Manual

3 System Maintenance

Issue 01 (2018-05-18)

Huawei Proprietary and Confidential

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.

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