ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 180)

220V and is 190V or 380V between two phase cables. A three-phase electrical

network rather than a single-phase network is used in some buildings since it

makes it possible to convey more electrical power and therefore to supply

more electrical devices in the building. Three-phase networks are also used to

supply motors requiring a three-phase voltage for their operation.

Both topologies are described more precisely in the following sections.

Single-Phase Wiring

Most dwellings (apartment, house, small building) have single-phase wirings, since

their electrical power supply requirements are less than a 60-A current.

As illustrated by Figure 8.9, a single-phase electrical wiring includes several

cables (bus-bar connections) starting from the circuit breaker panel to supply power

to the home’s electrical devices and lights.

Figure 8.10 illustrates the topology of the single-phase electrical network of an

apartment with the various cables starting from the circuit breaker panel. The PLC

devices and modems connect to the outlets of the house rooms. The PLC signal

Topology of Electrical Networks 161

Table 8.5 PSD and Regulations in Each HomePlug AV Sub-Band

CENTRAL SUB-BAND

FREQUENCY (MHz)

MAX. PSD

(dBm/Hz)

CARRIER ON/OFF COMMENT

F ≤ 1.71 −87

Carriers 0–70 off AM broadcast band and below

1.71 < F < 1.8 −80

Carriers 71–73 off

Between AM band and 160m

amateur band

1.8 ≤ F ≤ 2 −80

Carriers 74–85 off 160m amateur band

2 < F < 3.5 −50

Carriers 86–139 on HomePlug carriers

3.5 ≤ F ≤ 4 −80

Carriers 140–167 off 80m amateur band

4 < F < 5.33

-50 Carriers 168–214 on HomePlug carriers

5.33 ≤ F ≤ 5.407 −80

Carriers 215–225 off 5 MHz amateur band

5.407 < F < 7 −50

Carriers 226–282 on HomePlug carriers

7 ≤ F ≤ 7.3 −80

Carriers 283–302 off 40m amateur band

7.3 < F < 10.10 −50

Carriers 303–409 on HomePlug carriers

10.10 ≤ F ≤ 10.15 −80

Carriers 410–419 off 30m amateur band

10.15 < F < 14 −50

Carriers 420–569 on HomePlug carriers

14 ≤ F ≤ 14.35 −80

Carriers 570–591 off 20m amateur band

14.35 < F < 18.068 −50

Carriers 592–736 on HomePlug carriers

18.068 ≤ F ≤ 18.168 −80

Carriers 737–748 off 17m amateur band

18.168 < F < 21 −50

Carriers 749–856 on HomePlug carriers

21 ≤ F ≤ 21.45 −80

Carriers 857–882 off 15m amateur band

21.45 < F < 24.89 −50

Carriers 883–1,015 on HomePlug carriers

24.89 ≤ F ≤ 24.99 −80

Carriers 1,016–1,027 off 12m amateur band

24.99 < F < 28 −50

Carriers 1,028–1,143 on HomePlug carriers

F ≤ 28

–80 Carriers 1,144–1,535 off 10m amateur band

1 2 ... 175 176 177 178 179 180 181 182 183 184 185 ... 348 349

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