Alstom MiCOM P54 Series, Техническое руководство, Страница: 277 / 1024

Operation P54x/EN OP/La4
MiCOM P543, P544, P545 & P546
(OP) 5-103
OP
2. COMMUNICATIONS BETWEEN RELAYS
2.1 Communications link options
A number of communications options are available, for the communication channels
between P54x system ends. The various connection options are shown below. Choosing
between each of these options will depend on the type of communications equipment that is
available.
Where existing suitable multiplexer communication equipment is installed for other
communication between substations, the 850 nm option together with an appropriate ITU-T
compatible electrical interface (P590 series unit) should be selected to match the existing
multiplexer equipment. For further information on the P590 optical fiber to electrical interface
units, refer to section 2.1.8
Where an IEEE C37.94 compatible multiplexer is installed the 850 nm option should be
configured to interface directly to the multiplexer, refer to section 2.1.5.
Where no multiplexer is installed, the direct optical fiber connection can be used, refer to
sections 2.1.1 - 2.1.4. The type of fiber used (multi-mode or single-mode and wavelength)
will be determined by the distance between the ends of the P54x relay system, refer to
optical budgets in chapter
P54x/EN/AP
.
In any configuration, except the IEEE C37.94, the data rate may be selected as either
64kbit/sec or 56kbit/sec.
2.1.1 Direct optical fiber link, 850 nm multi-mode fiber
The relays are connected directly using two 850 nm multi-mode optical fibers for each
signaling channel. Multi-mode fiber type 50/125

m or 62.5/125

m is suitable. BFOC/2.5
type fiber optic connectors are used. These are commonly known as “ST” connectors (“ST”
is a registered trademark of AT&T).
P 54 0
85 0nm
P 54 0
85 0nm
Op tical f i b re
This is typically suitable for connection up to 1km.
2.1.2 Direct optical fiber link, 1300 nm multi-mode fiber
The relays are connected directly using two 1300 nm multi-mode fibers for each signaling
channel. Multi-mode fiber type 50/125

m or 62.5/125

m is suitable. BFOC/2.5 type fiber
optic connectors are used.
P 54 0
1 3 00nm
P 54 0
1 3 00nm
Op tical f i b re
This is typically suitable for connection up to approximately 50 km (from April 2008).
Pre-April 2008 relays were suitable for connection up to approximately 30 km.
2.1.3 Direct optical fiber link, 1300 nm single-mode fiber
The relays are connected directly using two 1300 nm single-mode fibers, type 9/125

m for
each signaling channel. BFOC/2.5 type fiber optic connectors are used.
P 54 0
1 3 00nm
P 54 0
1 3 00nm
Op tical f i b re
This is typically suitable for connection up to approximately 100 km (from April 2008).
Pre-April 2008 relays were suitable for connection up to approximately 60 km.