5
60±0.1Hz to 60±10.0Hz can be set freely
7. Output current: 5A or external power supply 30A
8. Output voltage: 400V or external power supply 1000V
9. Measuring line requirements: Current line copper core cross-sectional area ≥1.5mm2
Voltage line copper core cross-sectional area ≥1.0mm2
10. Test power supply: Built-in 2kW variable frequency power supply or external
high-power variable frequency power supply.
11. Power supply: AC220V±10%, 50Hz
12. Dimensions: 500mm*377mm*330mm, instrument weight: 20kg
V.Instrument principle
Figure 1
Schematic diagram of measurement principle
1. R0 loop resistance is about 5
~
200Ω
2. Rx test resistance is about 0
~
200Ω
3. Rf standard resistance
4. Measuring current line D: The length is 3 to 5 times the diagonal length of the ground
grid; wire diameter: ≥1.5mm
2
5. Measuring voltage line 1: length is 0.618D; line diameter: ≥1.0mm
2
6. Measuring voltage line 2: connect to the measured ground network
7. Measuring ground wire: grounding net
测
试
电
源
输
出
微
机
信
号
处
理
输出
控制
R
0
R
x
R
f
Summary of Contents for HZDW-DB
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