Megger BGL Battery Ground-Fault Locator

Megger BGL Battery Ground-Fault Locator
Enlarge Image
Megger BGL
Request Quote Print Page


The Battery Ground-Fault Locator (BGL) simplifies the tracking of ground faults on floating dc-powered control systems.

It features automatic operation, can be used on live battery systems and has the unique capability of detecting, tracking and locating multiple faults on a battery system without having to resort to sectionalizing.

This is accomplished by injecting a low- amplitude 25 Hertz test signal on either the positive or negative side of the power bus and tracking the signal with one of several available clamp-on sensor probes.

A fault simulator also is provided with the instrument, allowing the periodic verification of the resistance and capacitance ranges of the BGL.


  • Locates ground faults on floating battery systems
  • Operates on floating or resistance-grounded battery systems
  • Multiple fault detection and tracking
  • Automatic operation
  • Battery operated
  • Reads resistance directly (1 ohm to 100 kilohms)
  • Operates in the presence of surge-correction capacitors
  • Fused output leads for maximum user safety
  • Battery operated with internal automatic charger
  • Measures capacitance
  • Lightweight and portable
  • Tough polyethylene plastic sealed enclosure that provides high shock and vibration resistance



Input (specify one) 120 V, 60 Hz, 30 VA OR 240 V, 50 Hz, 30 VA
Battery Lead-acid rechargeable
Resistance Range 1 Ω to 100 kΩ
Capacitance Range 1 to 100 μF
Accuracy ±15% to ±40%
Injected Signal 25 Hz nominal, 3.5 V rms maximum, 110 mA maximum
Maximum Ripple Current 0.5 A (ac)
Operating Temperature 32 to 122° F (0 to 50° C)
Storage Temperature -40 to +149° F (-40 to +65° C)
Relative Humidity Up to 80%
Dimensions 13 H x 14 W x 10 D in. (330 H x 356 W x 254 D mm)
Weight 25 lb (11.3 kg)