ABB RET615 - Page 29

Table 16. Station communication link, fibre-optic
Connector
Fibre type
1)
Wave length Max. distance
Permitted path attenuation
2)
LC MM 62.5/125 or 50/125
μm glass fibre core
1300 nm 2 km <8 dB
ST MM 62.5/125 or 50/125
μm glass fibre core
820-900 nm 1 km <11 dB
1) (MM) multi-mode fibre, (SM) single-mode fibre
2) Maximum allowed attenuation caused by connectors and cable together
Table 17. IRIG-B
Description Value
IRIG time code format
B004, B005
1)
Isolation 500V 1 min.
Modulation Unmodulated
Logic level TTL Level
Current consumption 2...4 mA
Power consumption 10...20 mW
1) According to 200-04 IRIG -standard
Table 18. Lens sensor and optical fibre for arc protection
Description
Value
Fibre-optic cable including lens 1.5 m, 3.0 m or 5.0 m
Normal service temperature range of the lens -40...+100°C
Maximum service temperature range of the lens, max 1 h +140°C
Minimum permissible bending radius of the connection
fibre
100 mm
Table 19. Degree of protection of flush-mounted IED
Description
Value
Front side IP 54
Rear side, connection terminals IP 20
Transformer Protection and Control 1MRS756891 F
RET615
Product version: 4.0
ABB 29