Eagle Eye Power Solutions’ GFL-1000 Ground Fault Detector & Locator is an advanced testing instrument designed to detect and locate inadvertent grounds in live DC systems.
How the GFL-1000 Locates Ground Faults
The GFL-1000 identifies inadvertent grounds by injecting a low-frequency signal onto the faulted polarity. Using current clamps and the portable receiver, technicians can trace the signal to determine the physical location of the ground fault. Because the unit operates with very low output current, online DC systems can be tested at voltages up to 1000V.
Learn how the GFL-1000 traces a ground fault.
Support NERC PRC-005-6 Ground-Fault Inspections
NERC PRC-005-6 requires applicable battery and DC power systems to be inspected for inadvertent grounds every four months. When a ground fault is detected, the GFL-1000 helps technicians locate the fault without de-energizing the live DC circuit.
Key Features
- Patented technology pinpoints current leakage fault with grounding resistance lower than 1MΩ
- Industry-leading ground fault testing for both online and offline DC systems
- Waveform analysis will analyze the interference signal in the circuit
- Wide output voltage range allows the GFL-1000 to meet the needs of your electronic equipment
Specifications
| Output Voltage: | 24, 48, 110, 220, 500, 1000 VDC |
| Output Frequency: | 10 Hz |
| Output Current Limitation: | 5 mA or Unlimited (Max 25mA) |
| Fault Location Sensitivity: | ≤ 1 MΩ |
| Current Detect Sensitivity: | AC/DC Circuit: ≥ 0.5 mA |
| Quick Search Clamp: | 55 mm (diameter), 60 mm (jaw opening) |
| Current Sensor: | φ8 and φ20 |
| Jaw Opening: | 60 mm (2.36 in) |
| Display: | Backlit Color LCD |
| Operating Environment: | Temperature: -5 – 40 °C (23 – 104 °F) |
| Power Requirements: | 8.4 VDC Li-ion Battery |
| Dimensions: | 360 x 260 x 135 mm (14.2 x 10.2 x 5.3 in) |
| Weight: | 7 kg (15.4 lbs) |
Resources & Support
Product Literature
Support Documents
- GFL-1000 Sell Sheet (PDF, 609 KB, opens in new tab)
- Ground Fault Locator – Drop-In Specifications (PDF, 375 KB, opens in new tab)
- Finding that Elusive Ground Fault (PDF, 260 KB, opens in new tab)
- GFL-1000 Quickstart Guide (PDF, 330 KB, opens in new tab)
- GFL-1000 User Manual (PDF, 3 MB, opens in new tab)
- GFL-1000 vs Competitor Comparison Chart (PDF, 137 KB, opens in new tab)
- GFL-1000 Training Guide (PDF, 1 MB, opens in new tab)
- GFL-1000 Tech Note – Tracing a Ground Fault (PDF, 720 KB, opens in new tab)
Video Resources
GFL-1000-CC Dual Clamps Set
Pinpoint elusive DC ground faults faster with the GFL-1000-CC Dual Clamps Set. These precision current clamps pair with the Eagle Eye GFL-1000 Ground Fault Detector & Locator to compare parallel paths, isolate feeders, and trace leakage without disconnecting circuits. Rugged, quick to deploy, and ideal for substations, telecom plants, and battery rooms.
GFL-1000-GB Signal Generator Battery
The GFL-1000-GB Signal Generator Battery is a direct-replacement power source for the GFL-1000 Ground Fault Detector & Locator. It ensures the GFL-1000 performs accurately during fault-finding and maintenance procedures. The GFL-1000-GB battery installs quickly with a precise fit, is built to Eagle Eye Power Solutions’ quality standards, and helps minimize downtime so technicians can keep critical DC systems safe and operational.
GFL-1000-GB Signal Generator Battery Charger
The GFL-1000-GB Signal Generator Battery Charger is the purpose-built charging solution for the GFL-1000 Ground Fault Detector & Locator. Designed to deliver the proper charge profile for the GFL-1000-GB Signal Generator Battery, it restores runtime quickly and safely so your signal generator is ready when you are—whether you’re troubleshooting intermittent grounds or commissioning new DC systems.
GFL-1000-RB Receiver Battery
Built specifically for the GFL-1000 Ground Fault Locator, the GFL-1000-RB Receiver Battery provides stable power, and its install-ready design supports dependable performance. Use it to replace an aged pack or to standardize spares across sites so the GFL-1000 remains responsive when it matters most.
GFL-1000-RB Receiver Battery Charger
Purpose-built for the GFL-1000 Ground Fault Locator, the GFL-1000-RB Receiver Battery Charger maintains the OEM receiver battery (GFL-1000-RB Receiver Battery) with the proper charging profile to preserve capacity and extend service life. Use it to reduce unexpected issues caused by undercharged or aging packs and to standardize spares across facilities.
FAQs
Why should you measure battery ground faults?
Battery ground faults are often times difficult to locate and create costly and catastrophic consequences if they remain undetected. The entire battery system will be compromised and subject itself to overheating, thermal runaway, and reduced battery capacity while creating a hazardous work environment.
Can the GFL-1000 test AC Systems?
No, the GFL-1000 Ground Fault Locator will only test DC systems.
How does the GFL-1000 detect a fault?
The ground fault detector works by injecting an AC signal into the bus system with respect to ground using the signal generator. The signal path is then traced using current clamps connected to the signal receiver. The direction of current flow is indicated on the receiver display, enabling the clamps to be moved to another branch or section of wiring. The measurement is repeated, the clamps moved again until the faulty part of the circuit is located.
What are some typical kinds of faults the GFL-1000 can test for?
A typical supply to be tested will consist of a main bus connection with many branches to different loads or systems. Typical faults you may encounter are:
- Fault from the positive bus to ground.
- Fault from part of a load to ground.
- Fault between bus bars (partial short circuit).
- Fault from a branch to ground.
- Fault from bus to a separate circuit (‘Wire Mix’ connection).
- Leakage capacitance (This is not a fault, but leakage capacitance may be distributed around the system and will influence measurement).
In all cases, the actual impedance (resistance) of the fault may be very high, very low due to a short circuit, or anywhere in between.
How is the GFL-1000 powered?
Both the signal generator and signal receiver use rechargeable batteries that can be charged using power supplies (110/220 VAC, 50/60 Hz) which are included in the GFL-1000 package. The state of charge for each unit is indicated by the icon in the top right hand corner of the unit’s display. Both units may be charged while switched off. When the units are fully charged an indicator on the power supply changes from red to green.
How long do the rechargeable batteries last on a full charge?
The batteries will last for approximately 4 hours in normal use.
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