Table 15. Station communication link, fiber optic
Connector
Fiber type
1)
Wave length
Typical max.
length
2)
Permitted path attenuation
3)
LC
MM 62.5/125 or 50/125 μm
glass fiber core
1300 nm
2 km
<8 dB
1)
(MM) multi-mode fiber, (SM) single-mode fiber
2)
Maximum length depends on the cable attenuation and quality, the amount of splices and connectors in the path.
3)
Maximum allowed attenuation caused by connectors and cable together
Table 16. Degree of protection of flush-mounted merging unit
Description
Value
Front side
IP 54
Rear side, connection terminals
IP 20
Table 17. Sampled measured values accuracy
Description
Value
Phase current
20%...6000%I
n
1)
Amplitude: 1% or ±0.003×I
n
Angle: ±2º
Residual current
1%...5%I
n
Amplitude: 0.001×I
n
Angle: ±4º
5%...6000%I
n
Amplitude: ±1%
Angle: ±1º
Phase voltage
80%...120% of U
n
Amplitude: ±0.5%
Angle: ±1º
Residual voltage (calculated)
1%...100% of U
n
Amplitude: ±0.5% or ±0.001×U
n
Angle: ±2º
1)
In the 80 A/0.150 V at 50 Hz sensor applications the maximum range depends on the application nominal:
….833 A (...31.237 mV/Hz) corresponds to 6000%I
n
833...1250 A (31.237...46.875 mV/Hz) corresponds to 4000%I
n
1250...2500 A /46.875...93.750 mV/Hz) corresponds to 2000%I
n
2500...4000 A (93.750...150.000 mV/Hz) corresponds to 1250%I
n
Table 18. Environmental conditions
Description
Value
Operating temperature range
-25...+55ºC (continuous)
Short-time service temperature range
-40...+85ºC (<16 h)
1)2)
Relative humidity
<93%, non-condensing
Atmospheric pressure
86...106 kPa
Altitude
Up to 2000 m
Transport and storage temperature range
-40...+85ºC
1)
Degradation in MTBF and HMI performance outside the temperature range of -25...+55 ºC
2)
For merging units with an LC communication interface the maximum operating temperature is +70 ºC
Substation Merging Unit
1MRS758420 B
SMU615
Product version: 1.0
14
ABB
