Fibre-Optic Communication Interfaces With C37.94 Protocol - ABB Relion 670 Series Application Manual

1MRK 505 382-UEN E
IEC07000183 V1 EN-US
Figure 61: Multiterminal line with five line ends (master-slave)
5.3 Fibre-optic communication interfaces with C37.94
protocol
The line differential protection IED can be configured with fibre-optic interfaces according to
C37.94 protocol.
Three different types of LDCM modules are available:
• Short range (SR): multi-mode fibre-optic 50/125 μm or 62.5/125 μm with 2-3 km to
telecommunication equipment (820 nm). Can also be used for back-to-back applications.
• Medium-range (MR): single-mode fibre-optic 9/125 μm for back-to-back applications with
< 80 km distances (1310 nm).
• .Long range (LR): single-mode fibre-optic 9/125 μm for back-to-back applications with <
110 km distances (1550 nm)
1
2
IEC07000087 V3 EN-US
Figure 62: SR-LDCM layout with two PCI connectors and one I/O ST type connector
Communication set-up, 670/650 series
Application Guide
I >
d
I >
d
ST
ST
© Copyright 2017 ABB. All rights reserved
I > I >
d d
Communication set-up
I >
d
IEC07000183-1-en.vsdx
GUID-93D69EE3-2ECA-4229-83D9-23182B4517AC v1
GUID-5A4E9F96-C38E-486D-A77B-F292FD31B1F9 v1
IEC07000087-3-en.vsdx
Section 5
63