CSC-196 Time synchronization device for power system Manual
guarantee time accuracy of the output signal to be better than 1us, meet requirement of PMU
and so on to accurate time-transfer signals.
4) Many time synchronization signals such as the time comparing pulse, IRIG-B, serial port time
message and network time message (SNTP) can be able to output.
5) Many time synchronization signal interfaces such as optical fiber, idle contact, TTL,
RS-422/485, RS-232 and Ethernet are available.
6) The 19” 2U standard rack-type case is adopted, which has modularization design, input
signal receiving cards and time signal output cards can be configured as required.
7) Both the master clock and slave clock have built-in accurate crystal oscillators, which may
keep time synchronization signal output automatically even in case of external time reference
signal trouble, time accuracy under self time keeping state is better than 0.92us/min (55us /h).
8) It supports the time compensation function, can set compensating parameters of all input
signals and output signals freely to compensate error caused by long distance signal
transmission, thereby guarantee output signal accuracy of each master clock or slave clock to
reach ±1us.
9) It supports double power supply hot standby, all output interfaces are buffered outputs.
10) It has good maintainability, its front panel can display working status of the unit, the serial
port can provide detailed operating state information and failure diagnosis information for all
inputs and outputs for finding fault quickly; the input and output time reference signals can be
transferred to the test port to output outside.
11) Treatment of leap second identification complies with Specifications of time synchronization
system for power system and IEEE C37.118-2005, information about leap second can be
obtained in advance, and its forenotice marking is set to meet requirement of PMU.
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