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HF-GT-220 DC Ground Fault Locator
DC Ground Fault Locator accurately detects and pinpoints grounding faults within DC power systems. It helps engineers rapidly locate fault positions in battery cabinets and DC panels to eliminate hidden safety risks efficiently.
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The DC Ground Fault Locator measures the insulation status of equipment. When insulation is damaged and resistance drops below the specified threshold, it can trace insulation faults and locate damaged sections for maintenance.
Applicable to DC systems of various voltage levels, this unit is equipped with high-precision current clamps. Efficient multi-signal processing extends detection range and improves anti-interference capability. It displays insulation level of tested branches via insulation index and waveforms, accurately identifying fault locations and their relative directions to realize fast and reliable loop ground fault detection.
Product Parameters
| Item | Specifications |
|---|---|
| Ground impedance measurement range | 1 ~ 600 KΩ |
| Sensor resolution | 0.05 mA |
| Ground fault alarm threshold | 220V: 50KΩ; 110V: 25KΩ; 48V: 10KΩ; 24V: 6KΩ |
| Tolerable branch capacitance to ground | ≤5 μF |
| Maximum allowable total system capacitance to ground | ≤100 μF |
| Bus-to-ground resistance measurement | 0 ~ 1000 KΩ |
| Outer dimension (packing case) | 450×260×110 (mm) |
| Total weight | 2.5 kg |
| Applicable DC systems | 220V±15%, 110V±10%, 48V±10%, 24V±10%, or customized voltage levels upon request. |
Product Characteristics
- Locates metallic ground faults, non-metallic ground faults, loop grounding, simultaneous positive/negative grounding, balanced grounding and multi-point grounding.
- Measures and displays DC system voltage, voltage to ground and ground resistance value.
- High-precision sampling clamps enable reliable positioning of indirect and high-resistance ground faults.
- Efficiently and quickly locates ground faults on complex branches or loops.
- Supports insulation index display.
- Supports waveform display.
- Simple, fast and user-friendly operation.
- No distance restriction between signal generator and detector.
- Safe and reliable operation.
Key Features Table
| Features | Description |
|---|---|
| Multi-type fault positioning | Locate metallic, non-metallic, loop, multi-point and balanced positive-negative ground faults |
| Multi-parameter measurement | Display DC voltage, voltage to ground and ground resistance |
| High-precision sampling clamp | Accurate positioning for indirect and high-resistance grounding faults |
| Strong adaptability | Fast tracing for complex branches and loop ground faults |
| Dual display mode | Insulation index and real-time waveform visualization |
| Unlimited transmission distance | No distance restriction between generator and detector |
| Easy operation | Intuitive operation for fast on-site testing |
| Safe & stable | Reliable long-term field operation |
FAQ – DC Ground Fault Locator
Q1: What is a DC Ground Fault Locator used for?
A: It detects insulation deterioration and locates various grounding faults in DC power systems, helping maintenance engineers quickly find insulation damage points and eliminate hidden risks.
Q2: What types of ground faults can this instrument locate?
A: It supports metallic grounding, non-metallic grounding, loop grounding, simultaneous positive & negative grounding, balanced grounding and multi-point grounding faults.
Q3: Which DC voltage systems are compatible?
A: Applicable for 220V±15%, 110V±10%, 48V±10%, 24V±10%. Custom voltage levels can be provided on request.
Q4: What is the measurement range of ground impedance?
A: Ground impedance measuring range: 1 ~ 600 KΩ; Bus-to-ground resistance range: 0 ~ 1000 KΩ.
Q5: What is the sensor resolution?
A: The sensor resolution reaches 0.05mA, enabling accurate positioning of high-resistance and indirect grounding faults.
Q6: Are there different alarm thresholds for different voltage grades?
A: Yes.
220V: 50KΩ; 110V: 25KΩ; 48V: 10KΩ; 24V: 6KΩ.
Q7: Does system capacitance affect testing results?
A: The instrument can tolerate branch capacitance to ground ≤5μF and total system capacitance to ground ≤100μF, adapting to most communication and substation DC systems.
Q8: What data can be displayed on the device?
A: DC system voltage, voltage to ground, ground resistance value, insulation index and real-time waveforms.
Q9: Is there a distance limit between the signal generator and detector?
A: No distance restriction. It can trace faults over long-distance DC loops.
Q10: Can it handle complex branches and loop circuits?
A: Yes. With efficient signal processing, it quickly identifies fault positions in complex branches and loop circuits.
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