Eagle Eye Power Solutions

GFL-1000 Ground Fault Locator

The Eagle Eye GFL-1000 Ground Fault Locator is an essential instrument to identify faulty grounding where electrical cables have breakage and loss to the ground. The unit identifies the inadvertent ground by injecting a low frequency signal on the faulted polarity. By following the signal using the current clamps and the portable receiver, the physical location of the ground fault can be found. Measurement of online DC systems is possible as the output current of the GFL-1000 is very low but the output voltage can be up to 1000V.

Compliance with NERC PRC005-6 requires that the battery and DC power system be inspected for inadvertent grounds every four months. If a ground fault exists the GFL-1000 is the tool by which that fault can be located without the need to de-energize the live circuit.


  • Patented technology, pinpoint current leakage fault with grounding resistance lower than 1MΩ
  • Ground fault testing for both offline and online 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


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)


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.

Product Training

If you would like product specific training, please contact Eagle Eye directly. We offer complimentary training over the phone. Quotes can be provided for on site product-training. For more information call 1-877-805-3377 or email us at info@eepowersolutions.com. We provide timely support for all inquiries.

EEU Training Courses

Eagle Eye University (EEU) provides scheduled courses tailored to specific aspects of the critical power industry. All courses are also available at your location. The following courses are applicable to GFL-1000 Ground Fault Locator.

Battery 101
3月 2, 2020 - 3月 3, 2020

A comprehensive overview of battery types and how they are used in Standby Power applications

Intro to Battery Management for Standby Power Systems
3月 4, 2020 - 3月 5, 2020

An introduction on why and how to implement a battery management program

PRC-005-6 Battery Operation & Maintenance Compliance
11月 2, 2020 - 11月 3, 2020

Ensure that operation and maintenance procedures are in compliance with the battery maintenance requirements of NERC PRC-005-6

Comprehensive Battery Training

One or two day non-commercial courses designed around current battery monitoring methods and techniques


    Eagle Eye Power Solutionsはあなたのプライバシーを尊重します。私たちはあなたの個人情報を誰かに貸したり販売したりしません。今まで。 プライバシーポリシーを読む.