Dahua Technology D-SD6C3425XB-HNR-A-PV1, Руководство по установке

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16
8 Cable Diameter (30V DC) and Transmission
Distance
The recommended transmission distances are for reference only, and the actual conditions
shall prevail. The following table shows the maximum transmission distance of cables with
certain diameter when the 30V DC power source voltage loss rate is below 20%.
For devices powered by direct current, the maximum voltage loss rate allowed is 20%. For
example, when a device of 150W rated power is installed 45 feet (14 m) away from the
transformer, the minimum diameter needed is 0.80 mm.
In the following table, the unit for diameter is mm, and the unit for transmission distance is foot
(m).
Table 8-1 Cable diameter (36V DC) and transmission distance
Transmission
Power (W)
Transmission
Distance
(Diameter:
0.80) Transmission
Distance
(Diameter:
1.00) Transmission
Distance
(Diameter:
1.25) Transmission
Distance
(Diameter:
2.00)
5 1357 (414) 2120 (646) 3313 (1010) 8481 (2585)
10 678 (207) 1060 (323) 1656 (505) 4241 (1293)
15 452 (138) 707 (215) 1104 (336) 2827 (862)
20 339 (103) 530 (162) 828 (252) 2120 (646)
25 271 (83) 424 (129) 663 (202) 1696 (517)
30 226 (69) 353 (108) 552 (168) 1414 (431)
35 194 (59) 303 (92) 473 (144) 1212 (369)
40 170 (52) 265 (81) 414 (126) 1060 (323)
45 151 (46) 236 (72) 368 (112) 942 (287)
50 136 (41) 212 (65) 331 (101) 848 (258)
55 123 (37) 193 (59) 301 (92) 771 (235)
60 113 (34) 177 (54) 276 (84) 707 (215)
65 104 (32) 163 (50) 255 (78) 652 (199)
70 97 (30) 151 (46) 237 (72) 606 (185)
75 90 (27) 141 (43) 221 (67) 565 (172)
80 85 (26) 133 (41) 207 (63) 530 (162)
85 80 (24) 125 (38) 195 (59) 499 (152)
90 75 (23) 118 (36) 184 (56) 471 (144)
95 71 (22) 112 (34) 174 (53) 446 (136)
100 68 (21) 106 (32) 166 (51) 424 (129)
100 68 (21) 106 (32) 166 (51) 424 (129)
110 62 (19) 96 (29) 151 (46) 386 (118)