{PDF} Areva MiCOM P342-P344 – Generator Protection Relays. Short Technical Description

Areva, Electronic Edition, 2006. ? 8 pages.
Publication Automation-L3-P34x-BR-01.06-0838b-GB.
?? ?????????? ?????.The MiCOM P342 is suitable for protection of generators which require cost effective high quality protection. Protection includes overcurrent, ground fault, neutral voltage displacement, sensitive or restricted ground fault, voltage dependent overcurrent or underimpedance, under and overvoltage, under and overfrequency, reverse, low forward or overpower, field failure, negative phase sequence thermal, negative phase sequence overcurrent and overvoltage, turbine abnormal frequency, thermal and overfluxing, as well as VT and CT supervision.
The MiCOM P343 is suitable for protection of larger or more important generators, providing generator differential, 100% stator ground fault via a 3rd harmonic measuring technique, pole slipping and unintentional energisation at standstill protection in addition to the features of the P342.
The P344 is similar to the P343 but includes a second neutral voltage input for ground fault / interturn protection.Table of Contents:Customer Benefits.
Application.
Global Functions.
Functional Overview.
Main Protection Functions.
Generator Differential (P343/4 Only).
Interturn (Split Phase) Differential (P343/4 Only).
Interturn (Residual Overvoltage).
100% Stator Ground Fault 3rd Harmonic Method (P343/4 Only).
Phase Overcurrent.
Standard Ground Fault.
Sensitive Ground Fault.
Wattmetric.
Restricted Ground Fault.
Voltage Dependent Overcurrent/Underimpedance.
Neutral Displacement/Residual Overvoltage.
Under/Overvoltage.
Under/Overfrequency.
Turbine Abnormal Frequency.
Power Protection.
Loss of Field.
Negative Phase Sequence Thermal.
Negative Phase Sequence Overcurrent.
Negative Phase Sequence Overvoltage.
Overfluxing.
Unintentional Energisation at Standstill (P343/4 Only).
Pole Slipping (P343/4 Only).
Resistance Temperature Detectors (RTDs).
Thermal Overload.
Blocked Overcurrent Logic.
Analog (Current Loop) Inputs and Outputs (CLIO).
Supervisory Functions.
Circuit Breaker Failure Protection.
Voltage Transformer Supervision.
Current Transformer Supervision.
Plant Supervision.
Trip Circuit Monitoring.
Circuit Breaker State Monitoring.
Circuit Breaker Condition Monitoring.
Control.
Programmable Scheme Logic.
Independent Protection Settings Groups.
Control Inputs.
Information Interfaces.
Local Communication.
Rear Communication.