ABB Relion 670 Series Product Manual page 101

Line differential protection RED670 2.0
Product version: 2.0
Basic IED functions
Table 126. Self supervision with internal event list
Data
Recording manner
List size
Table 127. Time synchronization, time tagging
Function
Time tagging resolution, events and sampled measurement values
Time tagging error with synchronization once/min (minute pulse synchronization), events and sampled
measurement values
Time tagging error with SNTP synchronization, sampled measurement values
Table 128. GPS time synchronization module (GTM)
Function
Receiver
Time to reliable time reference with antenna in new
position or after power loss longer than 1 month
Time to reliable time reference after a power loss longer
than 48 hours
Time to reliable time reference after a power loss shorter
than 48 hours
Table 129. GPS – Antenna and cable
Function
Max antenna cable attenuation
Antenna cable impedance
Lightning protection
Antenna cable connector
Accuracy
ABB
Value
Continuous, event controlled
40 events, first in-first out
Range or value Accuracy
– ±1µs relative UTC
<30 minutes –
<15 minutes –
<5 minutes –
1MRK505310-BEN C
Value
1 ms
± 1.0 ms typically
± 1.0 ms typically
Value
26 db @ 1.6 GHz
50 ohm
Must be provided externally
SMA in receiver end
TNC in antenna end
+/-1μs
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