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A digital earth fault locator set used to pinpoint cable sheath faults and earth faults using the step-voltage method, with automatic zero calibration and noise suppression for reliable field measurements at 50/60 Hz.
A digital earth fault locator set used to pinpoint cable sheath faults and earth faults using the step-voltage method, with automatic zero calibration and noise suppression for reliable field measurements at 50/60 Hz.
Pinpointing means precisely locating faults in the cable sheath. These faults cause the measuring current to flow into the ground. When the measuring current exits the cable at the fault point, the current builds a voltage gradient which can be measured by earth rods and earth fault locators. The step voltage method accurately locates sheath faults: as it approaches the fault point, the step voltage potential increases. After it passes the fault, the potential decreases with reversed polarity. The change in polarity allows the fault to be located precisely.
The ESG NT2 earth fault locator measures the step voltage potential produced by underground test generators. Other existing underground distortions such as potential equalisation current, DC offset, 16 ²/³ Hz or influences from cathodic protection systems are automatically detected and eliminated. The automatic zero calibration maintains the display calibration continuously at zero.
The ESG NT2 has a high-contrast color display on which the measured step voltage is displayed in two ways: as a bar graph (similar to a conventional pointer instrument), and as a continuous “history-display” which shows both the current process and the last 5 to 6 measurement records. In this way, changes are displayed clearly and continuously.
Features
| Display | High-contrast color TFT, 320 x 240 pixels |
| Detection modes | Standard and power frequency (50/60 Hz) |
| Sensitivity | 5 μV |
| Suppression of disturbances | 50/60 Hz, 16 2/3 Hz, KKS, DC |
| Zero adjustment | Automatically |
| Duty cycle recognition | Automatically |
| Power supply | 6 x LR6 Alkali-Mangan (AA) |
| Operation time | > 20 hours |
| Protection class | IP54 |
| Dimensions receiver (H x B x D) | 2.56 x 8.86 x 3.94" (65 x 225 x 100 mm) |
| Weight Receiver | 1.98 lbs (0.9 kg) (including batteries) |
| Length Earth Rods | 39.37" (1 m) (divisible and isolated) |
| Weight Earth Rods | 1.76 lbs (0.8 kg) each |
| Length Test Leads | 78.74" (2 m) |
| Display | High-contrast color TFT, 320 x 240 pixels |
| Detection modes | Standard and power frequency (50/60 Hz) |
| Sensitivity | 5 μV |
| Suppression of disturbances | 50/60 Hz, 16 2/3 Hz, KKS, DC |
| Zero adjustment | Automatically |
| Duty cycle recognition | Automatically |
| Power supply | 6 x LR6 Alkali-Mangan (AA) |
| Operation time | > 20 hours |
| Protection class | IP54 |
| Dimensions receiver (H x B x D) | 2.56 x 8.86 x 3.94" (65 x 225 x 100 mm) |
| Weight Receiver | 1.98 lbs (0.9 kg) (including batteries) |
| Length Earth Rods | 39.37" (1 m) (divisible and isolated) |
| Weight Earth Rods | 1.76 lbs (0.8 kg) each |
| Length Test Leads | 78.74" (2 m) |
