GE VERNOVA | CENTRALIZED BUS PROTECTION SYSTEM | MICOM P746
The MiCOM Agile P746 provides complete protection for MV and HV busbar configurations with up to 2 zones plus a check zone, and up to 18 terminals. The MiCOM Agile P746 provides a centralized one box or three box architecture and is very simple to use. as it does not need to be deeply engineered and supports easy operation and maintenance of busbars. The MiCOM Agile P746 protects busbar configurations at voltage levels up to extra-high voltage. Proven techniques and dynamic topology processing algorithms offer a combination of security, speed and sensitivity, with simple configuration for centralized architectures.
Application
The MiCOM P746 Agile centralized numerical busbar protection has been designed to protect a wide range of busbar configurations:- 1-box mode - P746 (Can be used with DIT or CIT applications)
- 3-box mode - one P746 per phase. (In the 3-box mode. the units are totally independent and not linked to each other and cannot be used with NCIT applications.)
The MiCOM P746 Agile can accommodate: Up to 2 zones plus a check zone for 1 or 3-box mode and up to 4 zones for dual 1 or 3-box modes:
- 1 VT, up to 6 CTs, 6 breakers and 12 isolators with the 1-box mode solution (with DIT and CIT)
- 2 VTs, up to 12 CTs, 12 breakers and 24 isolators with the dual 1-box mode solution (with DIT and CIT)
- 2 VTs, up to 18 CTs, 18 breakers and 36 isolators with the 3-box mode solution (OnIy CIT)
- 2 VTs, up to 36 CTs, 36 breakers and 72 isolators with the dual 3-box mode solution (Only CIT)
The MiCOM P746 Agile is associated with each CT location, usually one per incomer/feeder and one or two for each bus coupler/bus section. The P746 acquires the analog signals from the associated CT and the binary signals from the auxiliary contacts of the circuit breakers and isolators. The P746 also incorporates the main circuit breaker failure logic together with additional protection functions (dead zone, overcurrent. etc…). The P746. particularly useful in double busbar applications. allows a high number of opto inputs (up to 40) and relay Outputs (up to 32), function keys and Offers Ethernet a second rear port board option.
Key benefits
- Tripping time is independent of substation topology and number of terminals
- User-friendly software tools for scheme monitoring
- Built-in CT saturation proof breaker failure protection
- Compatible with both conventional and NCITs
- No internal batteries in GE Vernova-branded models – removes a maintenance item and eases air-freight logistics
- Advanced binary inputs comply with the harshest norms for surge withstand, plus the ESI 48-4 EB2 standard. Spurious wiring pickup is eliminated without the use of interposing relays, external resistors or time delays. Battery/wiring faults, switching noise, and induction from long parallel circuits are tolerated without mis-operation
- Harsh environment protection extends the life of the product
Protection & Control
In addition to the protection and control elements, the P746 provides a wide range of measurement, monitoring, post fault analysis and self-diagnostic features:- Trip circuit supervision (using PSL)• On-line measurement
- Plant Status monitoring
- 4 alternative settings groups
- Programmable logic (PSL)
- Sequence of event recording (SOE)
- Comprehensive fault records
- Comprehensive disturbance
- Recording (waveform capture)
- User configurable function keys &hotkeys
- User configurable tri-colour LEDs
- Local and remote communications ports
- Time synchronisation
- Fully Customizable menu texts
- Multi-level password protection
- Test facilities
- Power-up diagnostics and continuous self-monitoring of relay
- User friendly settings. analysis and monitoring software
Advanced Communications
- Wide range of supported protocols courier/K-Bus. IEC 60870-5-103. DNP 3.0 (EAI-485 or Ethernet) and IEC 61850
- Advanced IEC51850 Edition, 2 implementation with IEEE 1588 support
- Redundant communications with zero downtime using optional PRP/HSR technology
