Earth testers
High Voltage Insulation / Continuity / Earth / Transformer
Properly designed grounding grid is an essential safety measure against dangerous overvoltages that could damage electrical systems or electrocute personnel. To ensure a reliable connection to earth, electrical resistances of soil, grounding electrodes and other parts of the grounding grid should be periodically measured and analysed.
Metrel earth testers are simple and easy to use and cover an entire spectrum of earth testing methods, from the basic to the most complex ones. They include 2-, 3- and 4-pole earth resistance, selective earth resistance, earth potential, earth resistance of multi-leg pylons, and earth impedance measurement with simulated lightning strike voltage pulse and many others.
Features*
- Possibility of performing all types of earth measurements with a single instrument.
- Earth measurements on pylons with protective earth cable connected.
- Measurement of HF-earth resistance.
- Measurement of earthing impedance with simulation of a 10/350 µs lightning strike impulse.
- Analysis of earth impedance as a function of the frequency due to a wide measurement frequency band (55 Hz ... 15 kHz).
- Sweep mode Z(f) with graphical presentation of the results.
- Measurement of earth potential and step and contact voltages.
- Checkbox: different self-check methods.
- Measurement of earth resistance (2 / 3 / 4–pole).
- Measurement of selective earth resistance (1 x clamp).
- Measurement of earth resistance (2 x iron clamps).
- Measurement of specific earth resistance (Wenner and Schlumberger method).
- Measurement of HF-earth resistance (25 kHz).
- Measurement of earth resistance of mono pylons with 10 m flex clamp.
- Measurement of earth resistance of multi–leg pylons with up to four flex clamps.
- Measurement of earth potential.
- Measurement of step and contact voltages.
- Impulse Earth measurement 10/350 µs.
- Measurement of DC resistance.
- Built-in help screens for referencing on site.
- Support for AUTO SEQUENCE®s and visual tests for advanced users.
- Bluetooth communication with PC, Android tablets and smart phones.
*Note: Presented features, functionalities and other information on this page represent a compound list of all products’ capabilities and not capabilities of each separate product. Consult datasheets and user manuals of each specific product for detailed information about supported features and functionalities.
Applications*
- Power generation.
- Using disconnected transmission lines in measurements.
- Renewable power plants.
- Hydroelectric power.
- Photovoltaic installations.
- Wind power generation.
- Power distribution.
- Earthing resistance of pylons.
- Remote antenna tower earthing resistance.
- Specific earth resistance measurement methods.
- Earthing measurement with fall of potential method.
- Hospital earthing measurement with fall of potential method.
*Note: Presented features, functionalities and other information on this page represent a compound list of all products’ capabilities and not capabilities of each separate product. Consult datasheets and user manuals of each specific product for detailed information about supported features and functionalities.
