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Tuning device

Tuning device

Tuning Device is used to adjust together with the main coil the necessary blocking frequency or bandwith.
The tuning device, depending on the desired frequency bandwidth could be either damped single frequency, double
frequency or wide band tuned.
The manufacturer calculates and sets the frequency range individually for each customer.
According to the customer's specifications the tuning device can be made for any frequency range, with an accuracy of 0.5 kHz in frequency range from 16 to 1000 kHz.
    Due do the unique scheme, design, types of materials, components and technologies of the tuning device the line trap could withstand the overvoltage caused by:
  • the nominal short-term current see item 19.3.2 IEC 60353;
  • atmospheric impacts (lightning) see item 19.3.1 IEC 60353;
  • other effects see items C 4.3 and C 5.2 IEC 60353.
The warranty period for the tuning devices is 5 years.
Lifespan is 20 years.

    "Electronic Information Systems" is ready to produce the customizable tuning devices (their specifications are available upon request):
  • to ensure the blocking frequency for two, three or more bands;
  • universal, for the line traps of different classes and manufacturers;
  • tunable, with possibility to change the blocking frequency range;
  • universal and tunable, combined product;
  • for all kinds of the line traps utilized in Russia at the moment.
Protective Device
As a protective device we use the non-linear surge arresters.

Non-linear polymer housed surge arresters are designed to protect the tuning device against atmospheric (lightning) and switching over voltages.

Hermetically-sealed polymer housed varistors are the main elements of the surge arresters.

Its operation is based on a highly nonlinear current-voltage characteristic of the varistors.

The varistors have an electrical resistance that varies with the applied voltage: at operating voltage the active currents flowing through the varistors do not exceed 1 mA, while at overvoltage they could reach hundreds or thousands of amperes.


Operating Conditions
    The line traps could operate under the following conditions:
  • Climatic conditions for long stable operation "U" (moderate) and "UHL" (moderate cold) climatic versions according to GOST 15150-69, GOST 15543-70;
  • type of atmosphere N according to GOST 15150-69; atmospheric type II according to GOST 15150-69;
  • altitude up to 2000 m above sea-level;
  • seismic resistance according MSK-64 macroseismic intensity scale is up to the 9th degree.


Customer Benefits
    Many types of the line traps are produced (about 60) which have:
  • different rated current;
  • various inductance;
  • different rated short-time current values.
    Relatively small dimensions and light weight give:
  • great opportunities to install the line traps directly on the coupling capacitors and switchgears;
  • advantages during overhaul and repair when the old line traps could be replaced by the new ones without changing the whole PLC system.
      • Line traps with non-standard frequency band
    • including the range from 16 to 24 kHz;
    • two-, three-and multi-frequency bandwith;
    • Bandwith Ranges Ra > 1000 Ohm.
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