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The HGT1 is a handheld meter to measure ground impedance as well as step and touch voltages. Using the CP CU1, test currents at variable frequencies can be fed into power cables or overhead lines safely to simulate a ground fault. Step and touch voltages at various locations as well as fall-of-potential for determining the ground impedance are measured with PTM for HGT1 at the time of the test current injection. Features: • Mobile solution – simplifies measurements at various locations inside and outside the substation • Frequency-selective measurement for effective noise suppression • Simulation of body and shoe resistance for step and touch voltage testing • Even more powerful with Primary Test Manager™ (PTM) • Fully automated due to GPS test point tracking and test current detection • Real-time assessment of step and touch voltages according to EN 50522 or IEEE 80 -
The CP CU1 measures line impedances and k-factors on overhead lines and power cables. Ground impedances can also be determined on large systems with the CP CU1, as well as touch and step voltages. Mains frequency malfunctions do not influence the measurements, as the CP CU1 uses variable output frequencies for measurements. This enables extremely precise and reproducible measurement results. Features: • Measurement is not affected by mains frequency interference – extremely precise measurement results are obtained • Compliance with the strictest safety standards for overhead lines and cables connections – diverting currents up to 30 kA • Easy to handle – heaviest component: 29 kg • Automatic logging: Results are recorded automatically by the software -
The Ground Resistance Tester Model 6471 is a portable measurement instrument designed to measure Ground Resistance with 2 clamps (no auxiliary rods), Bond/Connection Resistance (2-Pole and 4-Pole Kelvin sensing), Ground Resistance (3-Pole or 4-Pole), Ground Coupling Resistance, and Selective Ground Resistance, Soil Resistivity (Wenner or Schlumberger method). The Model 6471 measures from 0.01 to 99.99kΩ and is auto-ranging, automatically seeking out the optimum measurement range, test frequency and test current. Features: • 2- and 4-pole bond resistance and continuity measurement capabilities with automatic polarity reversal for versatile testing • 3-pole fall-of-potential measurement, ensuring accurate ground resistance readings in varied environments • 4-pole soil resistivity automatically calculates Rho and allows selection between the Wenner or Schlumberger test methods. • Manual and automatic frequency scanning from 41 to 513 Hz to achieve optimal test accuracy, even in electrically noisy conditions. • Selectable test voltage of 16 or 32 V, with up to 250 mA of test current, catering to different testing requirements. • Can store up to 512 complete tests to facilitate comprehensive data collection and review. • Includes DataView software for remote setup and operation. • Rechargeable NiMH batteries can be charged using a wall charger or vehicle power
