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4.3 Personal Computer Interface
The relay can be operated from a personal computer using an RS-232C port on the front panel.
On the personal computer, the following analysis and display of the fault voltage and current are
available in addition to the items available on the LCD screen.
• Display of voltage and current waveform: Oscillograph, vector display
• Symmetrical component analysis: On arbitrary time span
• Harmonic analysis: On arbitrary time span
• Frequency analysis: On arbitrary time span
For the details, see the separate instruction manual "PC INTERFACE RSM100".
4.4 Communication Interface
The relay can be provided with the following communication interfaces:
- RSM100 (Relay Setting and Monitoring)
- IEC 60870-5-103
- IEC 61850
4.4.1 RSM (Relay Setting and Monitoring System)
The Relay Setting and Monitoring (RSM) system is a system that retrieves and analyses the data
on power system quantities, fault and event records and views or changes settings in individual
relays via a telecommunication network using a remote PC.
For the details, see the separate instruction manual "PC INTERFACE RSM100".
Figure 4.4.1.1 shows the typical configuration of the RSM system via a protocol converter
G1PR2. The relays are connected through twisted pair cables, and the maximum 256 relays can be
connected since the G1PR2 can provide up to 8 ports. The total length of twisted pair wires should
not exceed 1200 m. Relays are mutually connected using an RS485 port on the relay rear panel and
connected to a PC RS232C port via G1PR2. Terminal resistor (150 ohms) is connected the last
relay. The transmission rate used is 64 kbits/s.
Figure 4.4.1.2 shows the configuration of the RSM system with Ethernet LAN (option). The relays
are connected to HUB through UTP cable using RJ-45 connector at the rear of the relay. The relay
recognizes the transmission speed automatically.
In case of the optional fiber optic interface (option), the relays are connected through graded-index
multi-mode 50/125
μm or 62.5/125μm type optical fiber using ST connector at the rear of the
relay.