ABB RELION REL670, Installation And Commissioning Manual

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Installing the optical fibres Chapter 5
Installing the IED
5 Installing the optical fibres
5.1 General
Connectors are generally color coded; connect blue or dark grey cable connectors to blue or dark
grey (receive) back-side connectors. Connect black or grey cable connectors to black or grey
(transmit) back-side connectors.
The IED can, if ordered accordingly, be equipped with an optical ethernet module (OEM), need-
ed for IEC 61850 communication and a serial communication module (SLM) for LON, SPA and
IEC 60870–5–103 communication. In such cases optical ports are provided on the rear side of
the case for connection of the optic fibres. Optical port X311 has the Tx and Rx connectors for
the OEM used for IEC 61850 communication. When LON, SPA and IEC 60870–5–10 is avail-
able the X301 port is used.
Either plastic or glass can be used. Plastic fibres use a snap-in connector, glass fibres a bayonet
connector.
When the optical ethernet module is used, the protection plate for the galvanic connection must
not be removed.
Caution!
The fibre optical cables are very sensitive to handling. Do not bend too sharply. The minimum
curvature radius is 15 cm for the plastic fibre cables and 25 cm for the glass fibre cables. If cable
straps are used to fix the cables, apply with loose fit.
Always hold the connector, never the cable, when connecting or disconnecting optical fibres. Do
not twist, pull or bend the fibre. Invisible damage may increase fibre attenuation thus making
communication impossible.
Note!
Please, strictly follow the instructions from the manufacturer for each type of optical ca-
bles/connectors.