Areva, Electronic Edition, 2005. — 8 pages.
Publication Automation-L3-P22x-BR-12.05-0810b-GB.
На английском языке.The MiCOM P22x protection relay range is designed for motor protection applications. A complete set of protection functions is performed on the measurement of current, voltage and temperature. In addition to these basic functions, the relay carries out a large number of other functions that enable it to protect and run the motor more effectively.
The reliability of the system is further enhanced via checks on bus voltage prior to start-up, supervision of trip-circuit wiring continuity and protection against circuit-breaker failure.
The MiCOM P22x protection relay range is particularly adapted to Oil refinery, chemical plant, metallurgy, glass and cement manufacturing, paper mills, electrical and mechanical engineering, food production, mining etc. It is also suitable for water treatment and in pumping stations as well as in steam power plants.Table of Contents:Customer Benefits.
Application.
Main Functions.
Functional Overview.
Protection Functions.
Short-Circuit (50/51).
Earth Fault (50N/51N).
Second Motor Protection Mode (48/49/49LR/50S/66).
CB Failure (50BF).
Limitation of the Number of Starts, Time between Starts (66).
Loss of Load (37).
Unbalance, Loss of Phase and Single Phasing (46).
Thermal Overload (49) - True RMS Base.
Undervoltage (27) / Overvoltage (59) / Re-acceleration Authorization (27 LV).
Latching of Output Relays (86).
Excessive Start Time (48) / Locked Rotor while Running or at Start-up (51LR).
Locked Rotor while Running or at Start-up (51S).
Anti-Backspin.
Presence of Bus Voltage Prior to Start-up.
Emergency Start-up.
Control Functions.
Independent Protection Setting Groups.
Programmable Scheme Logic (4 Basic Equations).
Trip Circuit Supervision.
CB Monitoring.
External Trips.
Shape of Start-up Current and Voltage.
Analogue Outputs.
Trip Cause Statistics.
Measurements and Recording Facilities.
Measurements.
Event Records.
Fault Records.
Disturbance Records.
User Interface.
Front Plate and Menus.
Dedicated and Programmable LEDs.
Push-Buttons and Function Keys.
Local and Remote Communication.
Software Support.
Hardware Description.
Case.
Weight.
