Copyright: Wuhan Nanxing Power Technology Co., Ltd. 鄂ICP备06008607号
Website：300.cn Wuhan
NDWR-III large grounding grid grounding resistance tester
basic information
Detailed parameters
Reference standard: GB/T17949.1-2000, DL/T475-2006.
Features:
● Strong anti-interference ability, self-contained variable frequency power supply module provides measurement output power, frequency can be changed to 45Hz or 55Hz, digital filtering technology is used to effectively avoid various power frequency interference signals on site, achieving high precision, accurate and reliable measurement;
● The instrument automatically judges the impedance of the current loop and automatically adjusts the output current value （rated current 5A） of the inter-frequency power supply. The test task can be completed automatically without human intervention.
● The instrument can measure the grounding impedance Z, the pure resistance component R and the pure inductance component X of the grounding grid.
The main parameters:
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Resistance measurement
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5A
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0.0001Ω～20Ω
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4A
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0.0001Ω～25Ω
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3A
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0.0001Ω～35Ω
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2A
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0.0001Ω～50Ω
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1A
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0.0001Ω～100Ω
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Resolution
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Grounding impedance: 0.0001, impedance angle: 0.0001°
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Precision
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Grounding impedance: ± (1% * reading + 0.002), impedance angle: ± (1% * reading + 0.02 °)
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Measuring current
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1A～5A，45Hz/55Hz
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Measuring voltage
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0V～100V，45Hz/55Hz
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Working power
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AC220V±10%
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Rated power
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500W
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Dimensions
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350mm×280mm×230mm
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Weight
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About 12Kg
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