Device description
A linear matching device - tunable with a grounding knife "ULS-PZ" together with coupling capacitors or capacitive voltage transformers is a circuit of a transformer band-pass filter (PF) or a high-pass filter (HPF), which ensures matching of the wave impedance, high-frequency subscriber equipment and the RF channel communication, formed by high-voltage wires, cables, ground wires in the nominal frequency band.
"ULS-PZ" is designed to work on power lines with voltage from 24 to 750 kV and lightning protection cables.
The main feature of "ULS-PZ" is the possibility of its restructuring at the facility when changing the capacity of the connection or the operating frequency range.
"ULS-PZ" is capable of solving problems that are currently being solved by connection filters "LMU5000" (Areva T&D, France), BLM (TesmecS.p.A, Italy), UAPA-1 (ZIV, Spain), MCD80 (ABB Ltd., Germany), SCA/SGA (SeltaS.p.A., Italy) and others for a similar purpose. It is manufactured on a modern technical basis, taking into account development trends and the needs of the energy industry. Transformers are made on modern high-quality ferrite cores.
ULS-PZ is equipped with a single-pole disconnector that acts as a grounding knife. The grounding knife on the ULS-PZ can withstand a current of 300 A.
ULS-PZ are designed for RF signal power of at least 200 W.
Specifications
|
Characteristic |
Meaning |
|
Connection diagram |
"phase - earth", "phase - phase", "two phase - earth" |
|
Frequency range |
24 - 1000 kHz with configurable subbands |
|
Connection capacity |
2 - 14 nF (2000 - 14000 pF) |
|
Rated resistance on the side of the overhead line |
180 - 450 ohm |
|
Rated resistance on the HF side of the cable |
75ohm |
|
Total attenuation in the passband |
<2 dB |
|
Reflection attenuation in the passband |
> 12 dB |
|
Rated Power (PEP) |
≤200W |
|
Effective value of the rated current of the disconnector |
300 A |
|
Distortion and intermodulation |
80 dB below the level corresponding to PEP (IEC 481, cls. 9.6) |
|
Configurations |
3rd order high-pass filter; 2nd order bandpass filter |
|
Environmental characteristic |
- 40°С ... +70°С at air humidity no more than 95% (IEC 870-2-2, class C3) |
|
Dimensions |
430x400x190 mm |
|
Weight, no more |
10 kg |
