MGFL100 - Battery ground fault locator
Battery ground fault locator
Battery ground fault locator
Key Benefits
- Efficient ground fault detection
- User-friendly and portable
- Ideal for critical systems
- Identify and locate battery system ground faults without downtime.
Description
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.
Frequently Asked Questions
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 keep 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.
Documents
- MGFL100_ds_en.pdfpdf 715.23 KB
- MGFL100_UG_en.pdfpdf 4.96 MB
- IT-Filter_DS_EN.pdfpdf 279.9 KB
- AC Tracing vs Pulse Application Note_v2A.pdfpdf 232.31 KB
- Circuit Characterisation Application Note_v1.pdfpdf 175.44 KB
- CT Magnetization_Application Note_v1.pdfpdf 155.66 KB
- Stray Capacitance Applicatoin Note_v1.pdfpdf 199.62 KB
- DC-ground-fault-locating-AC-coupling_CaseStudy1_EN.pdfpdf 1.68 MB
