Table 16. Ethernet interfaces
Ethernet interface Protocol Cable Data transfer rate
LAN1 (X1) TCP/IP protocol Fibre-optic cable with LC
connector or shielded twisted pair
CAT 5e cable or better
100 MBits/s
Table 17. LAN (X1) fibre-optic communication link
Wave length Fibre type Connector
Permitted path attenuation
1)
Distance
1300 nm MM 62.5/125 μm or
MM 50/125 μm glass
fibre core
LC <7.5 dB 2 km
1) Maximum allowed attenuation caused by connectors and cable together
Table 18. X4/IRIG-B interface
Type
Protocol Cable
Screw terminal, pin row header IRIG-B Shielded twisted pair cable
Recommended: CAT 5, Belden RS-485 (9841- 9844) or Alpha Wire
(Alpha 6222-6230)
Table 19. X9 Optical serial interface characteristics
Wave length
Fibre type Connector Permitted path attenuation Distance
820 nm MM 62.5/125 ST 4 dB/km 1000 m
820 mm MM 50/125 ST 4 dB/km 400 m
660 mm 1 mm Snap-in 10 m
Table 20. Degree of protection of flush-mounted protection relay
Description
Value
Front side IP 40
Rear side, connection terminals IP 20
Table 21. Degree of protection of the LHMI
Description
Value
Front and side IP 42
Table 22. Environmental conditions
Description
Value
Operating temperature range -25...+55ºC (continuous)
Short-time service temperature range -40...+70ºC (<16h)
Note: Degradation in MTBF and HMI performance outside the
temperature range of -25...+55ºC
Relative humidity <93%, non-condensing
Atmospheric pressure 86...106 kPa
Altitude up to 2000 m
Transport and storage temperature range -40...+85ºC
Generator Protection and Control
1MRS757583 C
Product version: 1.3
ABB 21
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