Megger MGFL100 Battery Ground Fault Locator
Megger MGFL100 Battery Ground Fault Locator helps teams find earth faults fast in battery and AC systems. It gives clear results, so engineers can act quickly and keep important equipment running.
Because it works online or offline, the unit suits live sites where shutdown is not ideal. It also supports ungrounded DC systems and AC IT networks, which makes it useful across many sectors.
Built for clear fault tracing
In use, the Megger MGFL100 shows fault resistance, system capacitance, leakage current, and fault current. It filters out noise and capacitance, so it alarms on true resistive faults instead of false readings.
Users also get sound and visual alerts while they trace the fault path. This saves time in the field and cuts the need for repeated checks.
Made for demanding sites
From battery rooms to hospitals and rail systems, this locator is designed for hard working environments. The Megger MGFL100 Battery Ground Fault Locator can run from its internal battery or from mains power for longer tasks.
Safety is a key part of the design, and the unit uses password protected voltage and current limits to reduce trip risk. Built in memory stores results for later review, while the system can also show which side of the battery string holds the fault.
Key Features
- Finds earth faults in AC and DC electrical systems
- Works on ungrounded DC systems and AC IT networks
- Runs on live systems without interrupting service
- Filters out noise and capacitance during tracing
- Triggers alarms on true resistive faults
- Shows fault resistance with clear on screen values
- Displays system capacitance during testing
- Reads leakage current for better fault analysis
- Reads fault current to support diagnosis
- Uses audio alerts to guide fault location
- Uses visual indicators for quick field checks
- Runs from an internal battery for portable use
- Can also use mains power for longer jobs
- Stores test results in built in memory
- Identifies which side of the battery string has the fault
- Supports use in hospitals rail sites and marine systems
Technical Specifications
| Manufacturer | Megger |
| Product name | Megger MGFL100 Battery Ground Fault Locator |
| Manufacturer part code | MGFL100 |
| Product type | Battery ground fault locator |
| System compatibility | Battery systems, ungrounded DC networks, and AC IT networks |
| Operating mode | Online or offline fault tracing |
| Maximum fault resistance | Up to 400 kΩ |
| Circuit rating | Circuits up to 600 V |
| Measured values | Fault resistance, system capacitance, leakage current, and fault current |
| Noise handling | Filters out noise and capacitance |
| Alarm response | Alarms on true resistive faults |
| Low frequency operation | Works in low frequency environments down to 16.67 Hz |
| Power options | Internal battery or mains power |
| Safety control | Password protected voltage and current limits |
| Lead protection | Fused leads for added safety when testing live DC systems |
| Fault indication | Audible and visual indicators |
| Result storage | Built in memory for saved test results |
| Battery string guidance | Indicates which side of the battery string the fault is on |
| Optional accessory support | Optional coupling filter for AC IT networks |
| Typical applications | Power supplies, hospitals, railway systems, marine systems, substations, and industrial sites |
Document Downloads
What’s Included
- MGFL100 Transmitter
- MGFL100 Receiver
- Transmitter leads with large and small fuse clips
- Transmitter power adapter
- Transmitter batteries 4 required per transmitter
- ICLAMP current sensor
- MGFL100 Active CT 9V battery
- Sync cable
- Transmitter Safety Ground
- Carry backpack for MGFL100 accessories
- 9m 30ft Sync Cable