The testing of the quality of the grounding (G) of power transmission towers poses a serious problem as they are all electrically interconnected by means of Ground Wires which act as lightning rods, protecting the lines from atmospheric discharges.
Because of this connection, any attempt to measure a tower grounding (G) resistance using a conventional earth meter leads to incorrect results as what is really being measured is all the shunt towers grounding (G) resistance (or more precisely, its impedance at low frequency). Trying to disconnect the ground wire from an energized line is a risky operation due to the need to climb the tower to its highest point as well as the close proximity of the high voltage conductors.
| MEASUREMENT RANGES | 0 – 300 Ω |
| OPERATION FREQUENCY | 25,000 Hz |
| TEST CURRENT | 20 mA automatic |
| INDUCTIVE COMPONENT COMPENSATION |
Through a bank of capacitors integrated into the equipment Maximum capacity 4.2 µF, Resolution 10 nF |
| MEASUREMENT ACCURACY | ±2.5% of reading ±1 digit |
| DISPLAY | Alphanumeric display (LCD) |
| MAX EARTH RESISTANCE OF AUXILLIARY RODS |
2000 Ω (current rod) 2000 Ω (voltage rod) |
| BUILT-IN MEMORY | Up to 2000 test readings |
| DATA OUTPUT | USB and Bluetooth interfaces. Built-in printer |
| SOFTWARE | Software for remote control via a tablet. Compatible with Android 4.0 Ice Cream Sandwich (API 14) or higher. |
| POWER SUPPLY | Internal rechargeable battery, 12.6 V, 6000 mAh |
| BATTERY CHARGER | 12 V - 2A (AC adapter) |
| OPERATING TEMPERATURE | -5°C to 50°C |
| STORAGE TEMPERATURE | -15°C to 65°C |
| HUMIDITY | Up to 95% RH (non-condensing) |
| DIMENSIONS (approx.) | 13” (340 mm) L x 12” (295 mm) W x 6” ( 152 mm) H |
| WEIGHT (approx.) | 11 lbs ( 4.9 kg) |
- Operation frequency 25 kHz
- Resistance reading up to 300 Ω
- Automatic compensation of inductive component
- Automatic current injection USB and Bluetooth interfaces
- Built-in memory and printer
- Rechargeable battery
Comments are closed.
