- 1673 -
Communication interface for Protection (Protection Signal)
Optical interface (2 km class)
Type of fibre
Connector type
Wave length
Optical transmitter
Optical receiver
Graded-index multi-mode 50/125m or 62.5/125m
ST
820nm
LED, more than −19dBm(50/125m), −16dBm(62.5/125m)
PIN diode, less than −24dBm†
Optical interface (30 km class)
Type of fibre
Connector type
Wave length
Optical transmitter
Optical receiver
Single mode 10/125m
Duplex LC
1310nm
Laser, more than −13dBm
PIN diode, less than −30dBm†
Optical interface (80 km class)
Type of fibre
Connector type
Wave length
Optical transmitter
Optical receiver
DSF 8/125m
Duplex LC
1550nm
Laser, more than −5dBm
PIN diode, less than −34dBm†
†If receiving signal is lower than a rated power, optical communication failures may
occur in the IED because of insufficient receiving sensitivity.