ULS-Z Linear matching device with grounding knife

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.

Spesificstions

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).