Linear matching device with grounding knife
A linear matching device with a grounding knife (ULS-Z) is designed to connect the equipment of high-frequency channels of relay protection, emergency automation, communication and data transmission to power lines with a voltage of 35-750 kV, as well as lightning protection cables according to the “phase-to-ground”, “phase -phase", "two phases extreme-earth", "cable-earth" and "split cable-earth".
TU U 31.2-32431587-002:2010
Device description
Linear matching devices with a grounding knife, depending on the modification, cover the frequency range from 24 to 1000 kHz and are designed for an RF signal power no more 200 W. These devices have a fixed grid of frequency ranges, however, at the request of the customer, any physically realizable combinations of coupling capacitor capacitance, frequency range and input impedance can be implemented.
Versions of linear matching devices with a grounding knife.
| Capacitance of coupling capacitor, pF | Working frequency band, kHz | Characteristic line impedance, Ohm | Rated voltage of power line, kV |
| 2200 | 42 - 48 | 450 | 110 |
| 48 - 56 | |||
| 56 - 66 | |||
| 66 - 80 | |||
| 80 - 100 | |||
| 100 - 134 | |||
| 130 - 1000 | |||
| 3000 | 36 - 48 | 280 | 750 |
| 40 - 44 | |||
| 44 - 48 | |||
| 48 - 54 | |||
| 54 - 60 | |||
| 60 - 80 | |||
| 80 - 96 | |||
| 96 - 120 | |||
| 116 - 154 | |||
| 152 - 1000 | |||
| 3200 | 36 - 42 | 450 | 220 |
| 40 - 46 | |||
| 46 - 54 | |||
| 54 - 66 | |||
| 66 - 86 | |||
| 86 - 1000 | |||
| 4400 | 34 - 40 | 450 | 35 |
| 40 - 50 | |||
| 48 - 64 | |||
| 64 - 1000 | |||
| 4650 | 28 - 32 | 310 | 500 |
| 32 - 36 | |||
| 36 - 42 | |||
| 42 - 48 | |||
| 48 - 58 | |||
| 56 - 70 | |||
| 68 - 90 | |||
| 85 - 1000 | |||
| 6400 | 24 - 30 | 450 | 110 |
| 28 - 36 | |||
| 36 - 48 | |||
| 45 - 1000 | |||
| 7000 | 32 - 40 | 330 | 330 |
| 36 - 46 | |||
| 44 - 60 | |||
| 52 - 1000 | |||
| 14000 | 24 - 36 | 450 | 150 |
| 36 - 70 | |||
| 24 - 1000 |
When ordering a linear matching device with a grounding knife, it is necessary to specify the operating frequency range, line resistance and capacitance of the coupling capacitor with which it will work.
Spesifications
| Characteristics | Value |
| Connection type | «phase-to-ground», «phase-to-phase», «two phase-to-ground» |
| Nominal impedance (power line side) | 180 – 450 Ohm |
| Nominal impedance (PLC equipment side) | 75, 150 Ohm |
| Composed attenuation within subbands | < 2 dB |
| Return loss within subbands | > 12 dB |
| Power rating (РЕР) | 200 W |
| Distortion and intermodulation | Better than 80 dB at appropriate РЕР (IEC 481, cls. 9.6) |
| Resonant circuit | third-order high-pass filter; second-order band-pass filter |
| Temperature and humidity | - 40°С … +70°С and relative humidity not greater that 95% (IEC 870-2-2, class C3) |
| Dimensions | 360х350х190 мм |
| Weight | 8 кг |
The body of ULS-Z is made of silumin alloy, which has great strength and wear resistance. The case consists of a box and a lid held together with hinges and captive screws. There is a rubber gasket between the lid and the box.
ULS-Z is equipped with a single-pole disconnector that acts as a grounding knife. The grounding knife on ULS-Z can withstand a current of 300 A.
The linear matching device with a grounding knife is designed to operate outdoors at an altitude of not more than 1000 m above sea level at temperatures from -50°С to +45°С (223 - 318 K) and relative humidity of 98% at a temperature of +25°С ( 298 K).
