Optical Budget Calculation For Pmu - Pdc Communication - ABB REG670 Commissioning Manual

Section 11
Establishing connection and verifying the IEEE C37.118/1344 communication
11.6
114
Optical budget calculation for PMU - PDC
communication
Most of the times, the PMU IEDs are located in the substations. A local PDC might
be located in the substation. For communications within the substation or between
the IED and the WAN/LAN access point, it is important to know what is the optical
budget available. The graph in Figure
PMU – PDC configuration using typical OEMs.
14
12
62.5/125 µm
10
8
6
50/125 µm
4
2
0
0 0.5 1.0 1.5
FIBER OPTIC CABLE LENGTH - km
IEC11000409 V1 EN-US
Figure 38: Optical power budget for fiber optic cable lengths
As shown in the graph, if one uses a 62.5/125 µm fiber, the value under the
62.5/125 µm curve represents the remaining optical budget at any link length,
which is available for overcoming non-fiber cable related losses.
Losses in the connectors and splices are typically 0.3dB/connection. The user must
reserve 3dB spare for the uncertainty of the measurements.
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
38 shows the dynamic range available for a
2.0 2.5 3.0 3.5 4.0
IEC11000409_1_en.vsd
1MRK 502 073-UEN A
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Commissioning manual