LFG-200 is a cable test van-mountable low frequency signal generator used as part of a cable tracing and fault location set for the following applications:

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


Compared to other generators of its class, LFG-200 is characterized by increased output power (up to 200 VA) enabling a significantly larger location range in comparison with analogues. This advantage makes it possible to accurately pinpoint faults in the utilities buried deeply in wet soil and ensures consistent tracing results even at strong inductive interference levels.


Output signal frequency may be selected from a set of 12, which can be either default or by customised at customer’s request. A large set of frequencies allows to use the generator with almost any locator operating in the low frequency range.


The automatic impedance matching provides the maximum signal power in a wide load resistance range (0.5 ... 1000 Ω). This feature significantly improves the quality of location when tracing longer lines and/or operating in difficult conditions.


A complex output signal can be formed by adding two or three operating frequencies together.

Two-frequency signal is used for tracing utilities with a possibility to determine their burial depth.

When three-frequency signals are generated, it is also possible to fine-tune the receiver during tracing.


Operating LFG-200 in the pulse mode provides an easier signal detection at high level of extraneous noise.


The generator is fitted with a monochrome OLED display featuring convenient graphical indication of the operating mode, signal power, current, voltage, and other operating parameters.


The unified casing size allows for easy installation of the generator LFG-200 in the rack of a cable test van (ETL-series).

More about ETL >


* Pictures used herein are for illustration purposes only. *

System parameters Sets of operating frequencies*

491 / 982 / 8440 Hz

480 / 1450 / 9820 Hz

526 / 1024 / 8928 Hz

1024 / 2048 / 9820 Hz

Number of frequencies used simultaneously 1 … 3
Frequency selection Manual
Modulation type Amplitude
Output power adjustment range 0 … 200 V•A, resolution 10 V•A
Operating modes

■ Continuous

■ Pulse

Modulation (pulse) frequency 1 Hz
Load resistance range within which the maximum output power may be achieved 0.5 … 1000 Ω
Load resistance matching Automatic
Maximum output open-circuit voltage 460 VRMS
Ranges and accuracies of indicated parameters Output voltage 0.1 … 450 VRMS
Output current 0.01 … 20 ARMS
Phase shift angle 0 … 90°
Relative error of output voltage indication 5 %
Relative error of output current indication 5 %
Interfaces Display Monochrome OLED
Connection interface USB-B (service only)
Safety Grounding ■ Protective earthing

■ Overload

■ Overheating

■ Galvanic isolation of the output signal circuit


■ Mains power circuit: 2A, 250 V

■ Output signal circuit: 20 A, 600 V

Power supply and consumption Mains supply voltage 230 VAC, ± 10 %
Mains supply frequency 50 / 60 Hz
Power consumption when powered from mains supply up to 400 V•A
Physical Dimensions, H × W × D 133 × 482 × 350 mm
Weight 8.3 kg

* Sets of operating frequencies may be changed on the customer's request in the range of 100 … 10000 Hz.


* Products specifications are subject to change without notice. *

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