2
Description of Relay
2.2.8
Commissioning Data
The 7UT51 can be placed in test mode to aid in
commissioning the transformer and protection system.
•
Restraint Values
-
3 Phases, Segregated
-
Ground Restraint (87N application)
•
Differential Values
-
3 Phases, Segregated
-
Ground Differential (87N application)
•
Phase Angle Relationship Between
-
Phases of Same Winding
-
Same Phases of Different Windings
-
Calculated Residual and Actual Ground
Currents
-
Actual Ground Current and Phase Currents
2.2.9
Data Acquisition
•
12 Samples per Cycle Sampling Rate
•
Event Log: 50 Events (1 s resolution)
•
3 Fault Logs: 80 Events per Log (1 ms resolution)
•
Real-Time Clock with Time Stamping
•
Waveform Capture: 8 Waveform Records
-
5 s Buffer Total
-
Selectable Pre/Post-Fault
-
Individual Record Maximum Duration
-
Internal or External Trigger or Both. (External
trigger may be used to initiate capture from
sudden pressure or other relay operations.)
-
Manual waveform capture via PC or front
panel
•
Battery Backup Memory for Data
16
2.2.10
Configuration & Analysis
Software (WinDIGSI
•
Windows-Based Graphical User Interface
•
Menu-Driven for Settings, Configuration, Metering,
Log Interrogation, & Waveform Viewing
•
Advanced Oscillographic Analysis Capability
•
COMTRADE Compatible (import, export, storage)
2.2.11
Data Communication Ports
•
Front RS-232 Communications Port (Engineer/
technician can access through PC.)
-
Selectable Data Rates to 19.2k Baud
-
IEC 870-5 Compliant Communication
Protocols
•
Rear RS-232 Communications Port Galvanically
Isolated Wire Port or Optional Fiberoptic (820nm)
Port
-
Selectable Data Rates to 19.2k Baud
-
IEC 870-5 Compliant Communication
Protocols
-
Substation RTU Applications (11 bit)
-
Modem Applications (10 bit)
2.2.12
Control
•
Programmable inputs, LEDs, alarm contacts & trip
contacts
•
External Trips with Timers
•
Process or Re-Transmit External Signals or
Commands
•
Combines External Signals into Alarm Processing
7UT51 v3
)
®
PRIM-2330C