Hubbel RFL PLC Hybrid Pro, Руководство пользователя

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RF-MCHYBRIDPRO-01
Hubbell Power Systems, Inc. – RFL™ Products
June 2019 13 973.334.3100
It should be noted that the signals which are “split” between phases at one end of the circuit are re-
combined at the terminating end of the circuit. Therefore, the splitter does not add any additional loss
to the PLC channel.
It should also be noted that the splitter can be applied with different transmitter/receiver and hybrid
combinations, not just the one shown in
F
IGURE
6 .
3.6 Two Transmitters, Two Receivers, Phase-to-Phase Coupled
(high reliability method)
TX1
SK
RX1
TX2
SK
RX2
SPLITTER /
COMBINER
to/from Line Tuner A
to/from Line Tuner B
Figure 7 – Two Transmitters, Two Receivers, Phase-to-Phase Coupled (high reliability method)
F
IGURE
7 shows another variation of a phase-to-phase coupling application. This type of hybrid
scheme is used when two independent relaying channels are being applied. The difference between this
circuit and the one in
F
IGURE
6 is that there are independent coax cables entering and leaving the
phase-to-phase coupling hybrid. No single point of failure, other than the splitter/combiner itself, is
present (hybrids very rarely fail – they are ruggedized, passive devices).
This circuit introduces significant loss into the channel as compared to the splitter in
F
IGURE
6 , but it
allows the designer to keep the PLC channels and connections functionally and logically separated
while providing good isolation between the channels.
TX1/RX1 and TX2/RX2 might be part of redundant protection schemes. It should be noted that the
splitter/combiner can be applied with different transmitter/receiver and hybrid combinations, not just
the one shown in
F
IGURE
7 .