Earth Resistance Tester Grounding Resistance Tester 5A Large Grounding Grids Earth Resistance Tester
I. Product overview
At present, if we use traditional way to test earth resistance of geodetic network . we should avoid power frequency interference generated by power grid during operation and improve the accuracy of measurement value.Meanwhile,the insulation preventive test specifications stipulate: the test current of power frequency heavy current method should not be less than 30A. Thus cumbersome test equipment, complicated test process, heavy working strength of testers, long test time and other many problems appeared.
Model HM3001(5A) Grounding Resistance Tester adopts new type variable frequency AC power supply and microcomputer processing control, signal processing and other measures, which can properly solve the interference problem during test, simplify test operating process, improve precision and accuracy of test results.
II. Performance Features
1.Good power frequency equivalence of measurement. Test current waveform is sine wave, the difference between frequency and power frequency is only 5Hz, measure with 45Hz and 55Hz frequency.
2.Strong anti-jamming capacity. with pilot frequency measurement method and modern software and hardware filter technique, enabling the device to have very high anti-jamming performance, thus achieving stable and reliable test data.
3.High precision. Intrinsic error is only 0.005Ω, which can be used to measure the geodetic network with very small earth resistance.
4.Powerful functions. Able to measure current pile, voltage pile, earth resistance, step voltage and contact voltage.
5.Simple operation. Full English menu operation, directly display the measurement results.
6.Small amount of wiring labour, requiring no heavy current line.
Resolution: 001Ω
Measurement error: ± (reading×1%+0.005Ω)
Maximum output voltage: AC 400V (45Hz, 55Hz, double frequency, sine wave)
Maximum output current: AC 5A (45Hz, 55Hz, double frequency, sine wave)
Current output gears: 5/4.5/4/3.5/3/2.5/2/1.5/1A,, one gear every 0.5A, totalling 9gears.
Anti-jamming capacity: power frequency resistance 50Hz voltage 10V
Requirement for measuring line:
Sectional area of cooper core of current line≥1.5mm2
Sectional area of cooper core of voltage line≥1.0mm2
Electric power supply: AC 220V±10%, 50Hz
Contour dimension: 320×350×315mm3
Instrument weight: 27.5kG
I. Product overview
At present, if we use traditional way to test earth resistance of geodetic network . we should avoid power frequency interference generated by power grid during operation and improve the accuracy of measurement value.Meanwhile,the insulation preventive test specifications stipulate: the test current of power frequency heavy current method should not be less than 30A. Thus cumbersome test equipment, complicated test process, heavy working strength of testers, long test time and other many problems appeared.
Model HM3001(5A) Grounding Resistance Tester adopts new type variable frequency AC power supply and microcomputer processing control, signal processing and other measures, which can properly solve the interference problem during test, simplify test operating process, improve precision and accuracy of test results.
II. Performance Features
1.Good power frequency equivalence of measurement. Test current waveform is sine wave, the difference between frequency and power frequency is only 5Hz, measure with 45Hz and 55Hz frequency.
2.Strong anti-jamming capacity. with pilot frequency measurement method and modern software and hardware filter technique, enabling the device to have very high anti-jamming performance, thus achieving stable and reliable test data.
3.High precision. Intrinsic error is only 0.005Ω, which can be used to measure the geodetic network with very small earth resistance.
4.Powerful functions. Able to measure current pile, voltage pile, earth resistance, step voltage and contact voltage.
5.Simple operation. Full English menu operation, directly display the measurement results.
6.Small amount of wiring labour, requiring no heavy current line.
III. Technology Index
Measurement scope: 0~200Ω (including impedance of current pile)Resolution: 001Ω
Measurement error: ± (reading×1%+0.005Ω)
Maximum output voltage: AC 400V (45Hz, 55Hz, double frequency, sine wave)
Maximum output current: AC 5A (45Hz, 55Hz, double frequency, sine wave)
Current output gears: 5/4.5/4/3.5/3/2.5/2/1.5/1A,, one gear every 0.5A, totalling 9gears.
Anti-jamming capacity: power frequency resistance 50Hz voltage 10V
Requirement for measuring line:
Sectional area of cooper core of current line≥1.5mm2
Sectional area of cooper core of voltage line≥1.0mm2
Electric power supply: AC 220V±10%, 50Hz
Contour dimension: 320×350×315mm3
Instrument weight: 27.5kG