Generator LFG-50 is used in route tracing systems as a source of a low frequency electrical signal for the following applications:

  • tracing – finding the route and determining the burial depth of underground cables and other hidden utilities;
  • fault location – pinpointing inter-core and core-to-sheath short circuits faults;
  • cable identification – identifying a correct cable from a bunch.


LFG-50 stands out from other portable low frequency generators with its unusually high output power (up to 50 VA). High power output significantly extends the useful signal range and ensures accurate location even under such adverse factors as large burial depth of an object, wet soil, external inductance, etc.


The generator features four sets of frequencies each containing three different frequencies. Frequencies may be customized on request. The wide frequency selection allows for almost any low frequency signal receiver to be used in conjunction with the generator.


The output impedance of the generator is automatically matched to the load, which ensures maximum signal power in a wide resistance range (0.5 ... 1000 Ω). This function makes LFG-50 suitable for use in adverse location conditions as well as enables effective tracing of very long cables.


The generator can output complex signals formed by adding a number of different frequencies together.

Signals formed with adding two-frequencies allow a compatible signal receiver to determining a burial depth of an object during tracing.

Three-frequency signals allow to fine tune the receiver right during the tracing process.


Signals generation in pulse mode simplifies location at high levels of background noise.

Pulse mode can also significantly extend the operating time of the generator when powered from a built-in battery.


The generator is equipped with a monochrome OLED display which provide clear readings even in bright sunlight.

The display conveniently and clearly indicates the operating mode, output power, current and voltage levels, built-in battery charge and other operating parameters.


Along with a direct connection, it is possible to connect the generator to an object using inductive coupling (by means of a signal clamp or a built-in transmission antenna). Inductive coupling is used when either there is no access to the conductive parts of the object or it is energized.


Portable generator LFG-50 weighs only 8 kg and is enclosed in a compact and shock-resistant case protecting it against mechanical damage, dust and moisture. The generator is equipped with a built-in rechargeable frost-resistant lithium-iron-phosphate (LiFePO4) battery and an integrated control panel LED illumination. The ability to power the generator from the battery, mains or an external 12-volt DC source makes LFG-50 well suited for field operation.

* Pictures used herein are for illustration purposes only. *

Testing parameters Operating modes • Continuous
• Pulse
Sets of operating frequencies (default) • 491/982/8440 Hz
• 480/1450/9820 Hz
• 526/1024/8928 Hz
• 1024/2048/9820 Hz
Number of frequencies used synchronically 1 … 3
Frequency selection Manual
Modulation type Amplitude
Output power adjustment range 0 … 50 VA
Increment for power adjustment 2.5 VA
Pulse refresh rate (in the pulse mode) 1.0 Hz
Pulse duration (in the pulse mode) 0.5 s
Ranges of measured and indicated parameters,
measurement error
Output voltage 0.1 … 240 VRMS
Current 0.01 … 9.99 ARMS
Load impedance 0.5 … 999 Ω
Impedance matching Automatic
Phase shift angle 0 … 90°
Relative measurement error of voltage, current and impedance up to 5 %
Controls and indicators Connection interface USB-B (service only)
Display Monochrome OLED
Pushbuttons • Power switch
• Frequency selection
• Mode selection
Other controls Rotary encoder with push button
Indicators • Mains power supply
• External power source supply
Backlight LED light in the lid
Safety Protective devices and solutions • Protective earthing
• Overload protection
• Overheating protection
• Galvanic isolation of signal circuit
Fuses • Mains supply: 1 A, 250 V
• Battery: 10 A, 250 V
• External supply: 10 A, 250 V
Enclosure protection (as per EN 60529) IP 54 (with lid closed)
Power supply and consumption Supply voltage 230 V ± 10 %, AC, single phase
Supply frequency 50 / 60 Hz
Mains supply power consumption up to 100 V·A
External source voltage 10 … 15 V, DC
Current consumption from external source up to 8 A
Internal rechargeable battery 12 V, 10 Ah, LiFePO4
Battery life1 over 1 h @ maximum power
Average battery charging duration 3 h
Physical Dimensions, H×W×D 266×366×270 mm
Weight 8 kg

Battery life depends on selected power output and many other factors; actual results will vary. Battery life increases when the output power is decreased, or Generator is operated in pulse mode. Battery has limited recharge cycles.

* Products specifications are subject to change without notice. *

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