Timers And Time Delay - Siemens SIMEAS R-PMU Manual

8

8.3 Timers and Time Delay

8.3 Timers and Time Delay
Timers
As PMU time stamps refer to UTC, a precise GPS radio clock that provides a digital DCF77
output signal must be used.
The GPS satellite radio clock Hopf 6875 with modified SIPROTEC firmware (7XV5664-0AA00))
meets this requirement. This clock obtains the time information via GPS (Global Positioning
System) and has the appropriate accuracy that is required for the Phasor Measurement Unit.
If another timer is to be used, the specifications outlined in chapter 16.1.6, Technical Data must
be observed. Proper functioning of the PMU can only be guaranteed with the Siemens approved
accessories.
Figure 8-1 Example configuration
Note
Depending on SIMEAS R-PMU firmware version V40.01, the Sync-Box 7KE6000-8HAx recom-
mended for the synchronization of the SIMEAS R V2/V3 (7KE6000-0/1x) can also be used for
the synchronization of the SIMEAS R-PMU. Due to the lower precision, however, this configura-
tion is not recommended. Please note that the PMU data is marked as invalid when using the
Sync-Box.
106
GPS
Antenna
Lightning GPS Clock
BNC
Protection (Hopf 6875 )
FG4495 G0
7XV5664 -0AA00
BNC
DCF77 OUT
GPS IN
Sync-
7 KE6000 -8AK/L
Transceiver
CU
SIMEAS R-PMU
7 KE6100 -0 /1x...
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012