Name: Megger MGFL100 Battery Ground Fault Locator
SKU: MGFL100
Price: 9590.00 USD
Availability: InStock

Battery ground fault locator

The Megger MGFL100 is a specialized instrument designed to locate ground faults in battery systems without shutting them down. It uses a current clamp to pinpoint faults, making it ideal for critical systems where uninterrupted power is essential. The device is easy to use, portable, and provides quick, accurate results, ensuring minimal disruption to operations.

Efficient ground fault detection
- Identify and locate battery system ground faults without downtime
User-friendly and portable
- Lightweight design for easy operation and quick, accurate fault detection
Ideal for critical systems
- Ensures continuous operation by pinpointing faults without system shutdown

About the product:

Alarms when the real fault is identified
Direct measurement of resistance and stray capacitance
Direct measurement of fault current and leakage current
Adjustable current and voltage limits
Powered off AC or internal battery
Locates faults up to 400 kΩ
Locate faults on AC or DC systems
Operates on systems up to 600 V

The MGFL100 battery ground fault locator locates ground faults on ungrounded DC and AC systems, DC battery systems, and protected IT networks. It also alarms when the real fault is found, while automatically distinguishing between real fault current and reactive current drawn by stray system capacitance.

The MGFL100 measures the earth/ground fault resistance, the system capacitance, the real fault current, and the reactive leakage current. It also locates high impedance ground faults due to water ingress, as well as ground faults on systems with high leakage current. The MGFL100 makes locating the ground fault fast and easy by alarming when the circuit with a real ground fault is located. No complicated tuning out of noise or capacitance is required. Easily trace the fault with the lightweight transmitter and receiver. Set both password protected voltage and current limits to ensure you never put too much current in your system.

The MGFL100 also enables you to locate ground faults on Isolated-Terra (IT) grounded AC systems up to 600Vac, with the use of an optional coupling IT Filter.

Megger MGFL100

Can I trace faults on IT grounded AC systems?

Yes. Using the optional IT Filter, you can trace faults on IT grounded AC systems up to 600Vac.

Can I trace a fault if I cannot disconnect my ground fault monitor?

Yes. It is possible to trace a fault without disconnecting the battery ground monitor. To do this first take a measurement of the fault current out of the transmitter. Do this by placing the receiver CT around the appropriate output cable of the transmitter. Note the real fault current, as read on the receiver. This will be on the top display. Now place the CT around the earth connection of the ground fault monitor. Note the real current, as shown on the receivers top display. The difference between these 2 values will be the current being drawn by the real fault. Search for this current in the circuits in the panel. Be sure to use the sync cable for all of these measurements. This will ensure you are seeing only real fault current and not stray leakage current. NOTE: When you cannot isolate the earth connection from battery ground fault monitor it is recommended not to use the alarm feature of the receiver. Instead view the actual readings on the receiver.

How do I determine which circuit has the real fault?

The MGFL100's receiver has 2 displays. When the sync cable is connected, the top display will display the current going to the real fault. The lower display will display current going to circuit leakage.

The receiver reading keeps fluctuating, how can I stabilize it?

This can occur if on a very electrically noisy circuit. To eliminate this place the CT around both the circuit and its return. This will cancel out any noise on the system. If this is not possible then you can use 2 CTs to cancel out the noise. See the noise video on the MGFL100 product page, on the Megger web site.You can scan the QR code on the MGFL100 transmitter to open this web page.

MGFL100 Data Sheet

MGFL100 User Guide