PRS-7741 Bay Control Unit
The PRS-7741 relay is a microprocessor based Bay Control Unit (abbreviated as BCU)which is used for bay level controlling and monitoring in power grid.
It is suitable for application in Substation Automation System (abbreviated as SAS)with distributed control IEDs.
PRS-7741 is designed for controlling and monitoring switchgears such as circuit breaker,disconnector,and earthing switch.Additionally,it supports tap changer control for transformer and shunt reactor.
| ltem | Parameter |
|---|---|
| Performance | 32-bit high performance dual-core processor,internal high speed bus and intelligent I/O ports |
| Hardware | Modularized hardware design,flexibly configurable,easy extension |
| Interface | The human machine interface(HMI)with a small control module (a 320×240-dotLCD,a 16-key keypad and 30 LED indicators |
| Communication | Ethernet network,RS-485 serial ports.Communication protocol optional: IEC61850,IEC60870-5-103,DNP3.0 or ModBus. |
| Analog | Support the protocol IEC60044-8,IEC61850-9-2 and GOOSE,constantly measures and calculates voltage,current,power and frequency. |
| Recording | Fault and disturbance waves,operation reports,supervision,control opera- tion records and time tagged sequence of event. |
| Item | Parameter |
|---|---|
| Measurement | Conventional CT/VT sampling method with AC AI module in using electrical cable (24 samples per cycle) |
| Transducer input in DC for temperature,humidity,etc. | |
| Configurable | Programmable binary input Programmable binary output |
| Programmable software &hardware interlocking logic output Programmable LED indicators | |
| Supervision | PT Failure supervision |
| Current circuit supervision Self-diagnostic | |
| Device power supply supervision | |
| Even Recorder | Including 512 latest protection operation reports,51210 events,512 supervision events,128 control logs and 512 device logs |
| Synchronization | Supporting PPS,IRIG-B,PPM,SNTP,etc. |
