DDSU666-H Smart Power Sensor
User Manual
A Technical Specifications
Issue 01 (2018-05-18)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
14
Current value
Power factor
The percentage error
limitation of various
grade instruments
Direct connect
Via transformer
Class 1
0.05
Ⅰ
b ≤
Ⅰ
<
0.1
Ⅰ
b
0.02
Ⅰ
n ≤
Ⅰ
<
0.05
Ⅰ
n
1
±1.5
0.1
Ⅰ
b ≤
Ⅰ
≤
Ⅰ
max
0.05
Ⅰ
n ≤
Ⅰ
≤
Ⅰ
max
1
±1.0
0.1
Ⅰ
b ≤
Ⅰ
<
0.2
Ⅰ
b
0.05
Ⅰ
n ≤
Ⅰ
<
0.1
Ⅰ
n
0.5L
±1.5
0.8C
±1.5
0.2
Ⅰ
b ≤
Ⅰ
≤
Ⅰ
max
0.1
Ⅰ
n ≤
Ⅰ
≤
Ⅰ
max
0.5L
±1.0
0.8C
±1.0
When users has special requirement
0.25L
±3.5
0.2
Ⅰ
b ≤
Ⅰ
≤
Ⅰ
max
0.1
Ⅰ
n ≤
Ⅰ
≤
Ⅰ
max
0.5C
±2.5
A.2.3 Start
Under the referenced voltage and Table A-1, the sensor starts and continuously metering the
electrical energy.
Sensor
Energy meter grade
Power factor
Class 1
Direct connect
0.004I
b
1
Via transformer
0.002Ib
A.2.4 Defluction
The sensor shall have good anti-creeping logic, when the voltage loop is added with 1.15
times of referenced voltage, when the current loop is disconnected, the energy meter will not
produce more than one pulse.
A.2.5 Other technical parameters
Scale range
0-999999.99 kWh
Communication
protocol
Modbus-RTU protocol
