ULS linear matching device

Linear matching device

The linear matching device (ULS) 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-to-phase”, “ two phases extreme-earth", "cable-earth" and "split cable-earth".

TU U 31.2-32431587-002:2010


Device description
Linear matching devices, depending on the modification, cover the frequency range from 24 to 1000 kHz and are designed for an RF signal power of at least 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.

Connection capacitance Csv, pF

Frequency band dF, kHz

Line class, kV

Line characteristic resistance R, Ohm

1100

76-108

220

450

92-144

132-292

240-1000

1470

72-112

150

450

100-200

178-1000

2133

68-110

330

330

92-192

160-1000

2200

52-84

110

450

72-184

116-1000

2800

50-68

750

280

60-92

80-164

148-1000

3000

48-68

750

280

58-92

76-164

125-1000*

3200

48-100

220

450

76-1000*

3500

32-40

750

280

40-56

50-90

70-150

142-1000

48-80

500

310

64-148

120-1000

4000

40-60

400

300

56-120

98-1000

4100

83-1000

330

330

4400

36-84

35

450

56-1000

4650

36-60

500

310

48-104

75-1000*

6400

28-88

110

450

43-1000*

51-1000

7000

36-120

330

330

47-1000

7500

36-1000

грозотрос

550

9000

28-88

330

330

40-1000

14000

21-1000

150

450

17500

24-1000

35

450

18000

24-1000

150

450

*-special execution.
When ordering a linear matching device, it is necessary to specify the operating frequency range, line resistance and capacitance of the coupling capacitor with which it will work.

Technical characteristics

Characteristic

Meaning

Frequency range

24...1000 kHz

Operating attenuation in the passband, no more

1,6 дБ

Attenuation of inconsistency of the filter resistance on the line side, not less than

12 дБ

Overall dimensions

414х284х187 mm

Weight, no more

12 kG

The body of the ULS 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.
The linear matching device is designed to operate outdoors at an altitude of not more than 1000 m above sea level at a temperature of -50 ° C to +45 ° C (223 - 318 K) and a relative humidity of 98% at a temperature of +25 ° C (298 K) .