ABB RELION 670 Series Product Manual page 117

Transformer protection RET670 2.1 IEC
Basic IED functions
Table 152. Self supervision with internal event list
Data
Recording manner
List size
Table 153. 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 154. 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 155. GPS – Antenna and cable
Function
Max antenna cable attenuation
Antenna cable impedance
Lightning protection
Antenna cable connector
Accuracy
ABB
M11963-1 v5
Value
Continuous, event controlled
40 events, first in-first out
M12331-1 v7
SEMOD55660-2 v3
Range or value Accuracy
– ±1µs relative UTC
<30 minutes –
<15 minutes –
<5 minutes –
SEMOD55693-2 v5
1MRK 504 155-BEN F
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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