Megger MGFL100 Battery Ground Fault Locator

Detects ground faults on ungrounded DC/AC systems and IT networks. Includes direct measurement of fault resistance and leakage current, real-fault alarms and, fused safety leads.

Megger MGFL100 Battery Ground Fault Locator — Megger MGFL100 Battery Ground Fault Locator Front View

Megger MGFL100 Battery Ground Fault Locator Front View
Megger MGFL100 Battery Ground Fault Locator Remote
Megger MGFL100 Battery Ground Fault Locator and Remote

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Part Number

MGFL100

Manufactured

By Megger

Includes

FREE Ground Shipping
FREE Lifetime Tech Support

Availability

Call for availability

Product Manual Product Specs

Features

AC/Adapter: 90–264 VAC input, 18 VDC output
Battery: lithium-ion (4-hour life, <8-hour recharge)
Voltage range: 0–50V (±5% accuracy ±2 LSD)
Current range: 0–160 mA (±5% accuracy ±2 LSD)
Resistance range: 0–400 kΩ (±10 ± 280 x RC)% accuracy ±1 LSD
Capacitance range: 0–19.99 μF (±20% ±(.0027 / R) fd ±1 LSD)
Environmental:
- Operating temp: 0° to 50°C (32°F to 122°F)
- Receiver: -20° to 60°C (-4°F to 140°F)
- Humidity: 0–95% non-condensing
- Altitude: <2000 m (600V CAT IV), 2000–4000 m (600V CAT III)
Safety/EMC/Vibration:
- Meets requirements of IEC61010-1, CE, CAT IV @ 600
- EMI: CISPR 11 Group 1 class A for emissions
- EMI: IEC 61326-1 Table A.1 for immunity
- Vibration: MIL-STD-810G
Compliance: IEC61010-1, CE Certified, UKCA Certified

The Megger MGFL100 battery ground fault locator is a compact, versatile tool designed to locate ground faults in ungrounded DC and AC systems, DC battery strings, and IT-grounded AC systems. It delivers accurate fault tracing by directly measuring fault resistance, fault current, leakage capacitance, and leakage current. The transmitter and receiver work together to detect real faults and provide visual and audible alarms while ignoring phantom issues caused by capacitance, ensuring fast, accurate diagnostics with no manual tuning required.

Built for safety and efficiency, the MGFL100 includes fused leads to prevent arc flash hazards, adjustable current and voltage limits to avoid breaker trips, and password protection for added security. It operates on both AC and battery power, making it suitable for various environments. With a 5.12Hz AC output signal, it enables fault tracing on noisy systems or low-frequency networks without tripping DC breakers.

Megger MGFL100 Applications:

Ungrounded DC battery strings
Substations
Railways and industrial facilities
IT networks in hospitals and other protected environments
Maritime systems
Signal and control lines in critical infrastructure

Spec Sheets

Megger MGFL100 Battery Ground Fault Locator Datasheet (715 KB)

Manuals

Megger MGFL100 Battery Ground Fault Locator Manual (5.0 MB)

Other

Megger MGFL100 Battery Ground Fault Locator Case Study (1.7 MB)

Replacement Parts

Megger 1011-259 Transmitter

Megger 1011-259 Transmitter

Megger 1011-261 Receiver

Megger 1011-261 Receiver

Megger 1013-440 Fused Transmitter Leads

Megger 1013-440 Fused Transmitter Leads

Transmitter leads with large and small fused clips.

Megger 1014-426 Power Adapter Kit

Megger 1014-426 Power Adapter Kit

Transmitter power adapter. Powers transmitter and charges internal batteries.

Megger 1011-353 ICLAMP Current Sensor

Megger 1011-353 ICLAMP Current Sensor

ICLAMP and cable for MGFL100 receiver.

Megger 1011-540 Sync Cable

Megger 1011-540 Sync Cable

Used between MGFL100 transmitter and receiver or Capacitive pick up and receiver to allow measurement of leakage current.

Megger 1011-352 Transmitter Safety Ground

Megger 1011-352 Transmitter Safety Ground

Green safety ground cable - 5m (16ft).

Megger 1015-367 9m Sync Cable

Megger 1015-367 9m Sync Cable

Megger 2012-180 Backpack Lead Bag

Megger 2012-180 Backpack Lead Bag

Backpack Lead Bag for TTRU1 Handheld Transformer Turns Ratiometer and Accessories.

Accessories

Please consider these optional accessories.

Megger 1010-013 Magnetic Strap

Megger 1010-013 Magnetic Strap

Magnetic Strap for Megger TTRU1 Handheld Transformer Turns Ratiometer.

Megger 1012-068 Hanging Hook

Megger 1012-068 Hanging Hook

Hanging Hook & Strap (non-magnetic).

Megger 1013-424 Active CT

Megger 1013-424 Active CT

Flux gate CT used for small connections in tight locations.

Megger 1011-354 Capacitive Pick Up

Megger 1011-354 Capacitive Pick Up

Measure leakage current due to stray capacitance.

Megger 1014-472 Wide CT

Megger 1014-472 Wide CT

Wide CT with 10.8cm (4.25in) inner diameter. Goes around wire bundles.

Megger 90037-318 Stand Alone Charger

Megger 90037-318 Stand Alone Charger

External charger allows spare transmitter batteries to remain charged.

Megger 1014-289 IT FILTER

Megger 1014-289 IT FILTER

MGFL100 IT FILTER.

Need Help? Call a Temperature engineer at 1-800-884-4967

We're open Mo-Th 8am to 5:30pm. Fr 8am to 5pm ET

Ron J.
Temperature Engineering Lead
29 years at Instrumart

Rhys D.
Applications Engineer

David S.
Applications Engineer

Luke M.
Applications Engineer
6 years at Instrumart

Alex A.
Senior Applications Engineer
19 years at Instrumart

Dwight M.
Senior Applications Engineer
28 years at Instrumart

Shawn D.
Senior Applications Engineer
20 years at Instrumart

Ron J.
Temperature Engineering Lead
29 years at Instrumart

Rhys D.
Applications Engineer

David S.
Applications Engineer

Luke M.
Applications Engineer
6 years at Instrumart

Alex A.
Senior Applications Engineer
19 years at Instrumart

Dwight M.
Senior Applications Engineer
28 years at Instrumart

Shawn D.
Senior Applications Engineer
20 years at Instrumart

Ron J.
Temperature Engineering Lead
29 years at Instrumart

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Megger MGFL100 Battery Ground Fault Locator