ABB RELION RET670 User Manual

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en06000519-2.vsd
IEC06000519 V2 EN-US
Figure 426: Direct fibre optical connection between two IEDs with LDCM
The LDCM can also be used together with an external optical to galvanic G.703
converter as shown in figure
427. These solutions are aimed for connections to a
multiplexer
, which in turn is connected to a telecommunications transmission network
(for example PDH).
Telecom. Network
*) *)
Multiplexer Multiplexer
en05000527-2.vsd
*) Converting optical to galvanic G.703
IEC05000527 V2 EN-US
Figure 427: LDCM with an external optical to galvanic converter and a multiplexer
When an external modem G.703 is used, the connection between LDCM and the
modem is made with a multimode fibre of max. 3 km/2 mile length. The IEEE/ANSI
C37.94 protocol is always used between LDCM and the modem.
22.1.3 Setting guidelines
M12454-3 v6
64 kbit and 2 Mbit mode common settings
1MRK 504 163-UUS A Section 22
Remote communication
Transformer protection RET670 2.2 ANSI 953
Application manual

ABB RELION RET670 Specifications

General

Rated Frequency	50/60 Hz
Communication Protocols	IEC 61850, IEC 60870-5-103, DNP3
Operating Temperature Range	-25°C to +55°C
Mounting	Rack Mounting
Input Voltage	100-240 V AC
Protection Functions	Overcurrent Protection
Enclosure	IP20