PRS-7910
PRS-7910 5
The signal synthesis function is supported with the help of the configuration tool PRS-COMM.
Logical and mathematic operation of data such as AND, OR, NOT, XOR, +, -, x and ^ can be
proceed for the transmission to remote control center.
Command record and query
This device records all the commands and operations, which include control selection, control
execution, regulation, setting modification selection, setting modification execution, signal
reset, etc. All these records can be viewed and queried with filter.
History event record
This device automatically records the events during its service, which include self running
state change, alarm from connected IED, communication failure alarm, etc.
Double device redundancy strategy
Several device redundancy strategies are supported. The 2 devices are completely
electrically independent. Their power supplies, communication ports and programs run
independently. The inter-device exchange is realized by network connection.
Time synchronization
This device supports GPS (Global Positioning System) and BDS (BeiDou Navigation Satellite
System) timing signal reception.
This device provides both reception and transmission RS-485 ports for IRIG-B signal in order
to synchronize connected IEDs and to unify their clocks in one substation. It supports several
time synchronization formats, including IRIG-B, Pulse Per Second (PPS), network SNTP, etc.
On-line maintenance and monitoring
This powerful function enables the engineer to monitor the running status of this device
through network, including running information print, message display of Ethernet port and
serial port, on-field configuration, database view, virtual measurement, file transmission,
remote rebooting, etc. With all these advanced functions, the substation upgrade becomes
convenient.
Self-diagnostic
During service, the device keeps a full supervision on its software and hardware, once an
abnormality is found, the device will be self-blocked to ensure no maloperation is conducted,
meanwhile, an alarm will be sent out both digitally and hardware output as alarm. If the device
is dual equipped, at this time, if the abnormal device is on-duty then it will not only block itself
but also activate the backup device to take over all the tasks to ensure the substation is still
running normally. Meanwhile, the storage memory is checked regularly. If the storage memory
minimum threshold is reached, legacy data delete strategy will proceed automatically.
2.7 Features
High performance hardware architecture
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