Overview
Enviro Test Construct dc gound fault detectors are a new-generation tester. They can be adapted to DC systems at any voltage level, equipped with high accurate test clamping meter, improve the test range and anti-jamming capability through effectively processing multiple signals. Adopts excellent algorithm and advanced fuzzy control theory, expressed the advantage of tested insulation branch with the data. They can exactly judge the location of grounding point and can indicate the location and direction of grounding point in every time detection. These devices take system safety as the first premise, test with reliable low-frequency signal, and without any impact to system. They are applied to search the grounding point exactly of DC system of Power plant, substation without power failure. Regardless of various types of grounding fault, they can fast search the grounding point, and accuracy rate up to 100%.
Features
- Easy to operate
- Safe and reliable
- Applicable voltage levels are many
- Applicable range is wide
- Portable
- Signal receiver has battery, no need external power supply
- Search grounding point without power failure in DC system
- Strong anti-interference ability
- Intelligent charging management
Technical Specifications
| Frequency of output signal | 2.5 Hz |
| Signal no-load output voltage | ±20 V ±5% |
| Signal voltage amplitude error | <5% |
| Signal short circuit output current | ≤80 mA |
| Impact resistance of export | 400 V DC impulse |
| voltage of Power supply | AC 220 V ±10% |
| Voltage frequency | 50 Hz ±5% |
| Input the insurance | 200 mA |
| Max power | 3 W |
| Dimension | 11.8 in x 10.6 in x 7.9 in (300 mm × 270 mm × 200 mm) |
| Sensitivity of signal current detection | 0.5 mA |
| Signal generator resistance | 40 KΩ |
| Max output current | 2.5 mA |
| Receiver display | Digital 0 to 19 |
| A size of clamp open | Φ2 in (50 mm) |
| B size of clamp open | Φ0.3 in x 0.35 (7 mm x 9 mm) |
| Test for maximum ground resistance | 300 KΩ |
| Ground resistance measurement accuracy | 0 to 4.5 KΩ error ≤0.5 KΩ；4.5 KΩ to 300 KΩ error ≤10% |
| Dimension | 8.3 in x 3.9 in x 1.3 in (210 mm x 100 mm x 32 mm) |
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