Sigrand SG-17B, User Manual

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35
Appendix
А
Main characteristics of «
ТПП» cable
Table
А.1.
Frequency dependences for parameters of a twisted-pair cable
with copper cores and polyethylene insulation
(cables of «
ТП» type)
f,
KHz
Primary parameters
Secondary parameters
R~, Ohm/km L, H/km *10
-4
G, S/km *10
-4
|Z|, Ohm
α, dB/km
Core diameter: 0.4 mm
20 278 5.51 1.13 225.2 6.81
50 280 5.51 4.24 152.6 9.12
100 283 5.50 11.3 125.7 10.3
250 316 5.46 42.2 113.7 12.2
500 394 5.35 120 110.5 15.6
700 455 5.26 188 109.1 18.2
1000 535 5.15 305 107.7 21.7
Core diameter: 0.5 mm
20 181 5.50 1.13 185.1 5.15
50 182 5.50 4.24 133.3 6.48
100 189 5.49 11.3 118.0 7.17
250 234 5.40 42.2 111.6 9.21
500 310 5.23 120 108.8 12.4
700 361 5.26 188 107.4 14.6
1000 424 5.04 305 106.3 17.2
Table
А.2. Loop resistance of the cable
as depending on the core diameter:
Core diameter (mm) Loop resistance (Ohm/km)
0.32 432
0.4 278
0.5 180
0.64 110