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General| Type | Feeder Protection Relay |
|---|---|
| Rated Frequency | 50/60 Hz |
| Weight | Approx. 1.5 kg |
| Communication Protocols | IEC 61850, Modbus RTU, DNP3 |
| Protection Functions | Overcurrent, Earth fault, Thermal overload, Under/Over voltage, Under/Over frequency |
| Enclosure | IP20 |
Describes the Local Human-Machine Interface (LHMI) for setting, monitoring, and controlling the IED.
Details the predefined user categories for LHMI and WHMI with their respective rights and default passwords.
Explains the chronological record of system activities for reconstruction and examination of events and changes.
Covers the range of communication protocols supported, including IEC 61850, IEC 60870-5-103, and Modbus.
Details analog input settings for phase currents, residual current, and phase voltages, including units, steps, defaults, and descriptions.
Covers settings related to user authorization, including local override, remote override, and different user roles.
Details settings for binary inputs, including threshold voltage, input oscillation level, and input oscillation hysteresis.
Explains the IED's self-supervision system that continuously monitors software and electronics for fault conditions.
Describes the detection of internal IED faults, disabling protection operation, and activating the self-supervision output contact.
Describes the support for six setting groups, each containing parameters categorized as group settings.
Details the IED's capacity to store and analyze fault records, including fundamental or RMS current values.
Explains the configuration of binary inputs, including parameters for filter time, inversion, and oscillation suppression.
Describes how the filter time eliminates debounces and short disturbances on a binary input, and how it is set for each input.
Describes the available binary outputs used for tripping, control actions, and indicating signals.
Explains the use of power output contacts for controlling breakers and energizing trip/lockout relays.
Explains the RTD and mA analog input module for monitoring and metering, including scaling and supervision functions.
Details how inputs accept current or resistance type signals and are configured via the Input mode setting.
Describes how each RTD/mA input can be scaled linearly to construct a linear output function.
Explains the functionality to monitor the input measurement chain and report circuitry breaks or values outside limits.
Describes how each input sample is validated before being fed into the filter algorithm.
States that RTD and mA inputs are calibrated at the factory and monitor for circuitry breaks.
Indicates if the measured value exceeds or falls below set limits, providing range information.
Details the CONTROL function block for managing local/remote control, based on R/L button and binary inputs.
Explains how to restore the IED file system to the original factory state, including default settings and configuration files.
Covers the three-phase non-directional overcurrent protection function, including identification, function block, functionality, operation principle, and timer characteristics.
Details the three-phase non-directional overcurrent protection function, including identification, function block, functionality, and operation principle.
Explains the three-phase directional overcurrent protection function, covering identification, function block, functionality, operation principle, and measurement modes.
Describes the three-phase directional overcurrent protection function, including identification, function block, functionality, operation principle, and measurement modes.
Details the thermal protection function for feeders, cables, and distribution transformers, including identification, function block, functionality, and operation principle.
Explains the thermal overload protection function for power transformers with two time constants, covering identification, function block, functionality, and operation principle.
Describes the JAMPTOC function for protecting motors in stall or mechanical jam situations during the running state.
Explains the LOFLPTUC function used to detect a sudden load loss as a fault condition.
Details the MPTTR function for protecting electric motors from overheating, based on a thermal model.
Covers earth-fault protection, including non-directional and directional types.
Explains the non-directional earth-fault protection function for feeders.
Details the directional earth-fault protection function for feeders, including identification, function block, functionality, and operation principle.
Describes the INTRPTEF function for permanent and intermittent earth faults in distribution and sub-transmission networks.
Explains the EFPADM function for selective earth-fault protection in various network types.
Details the HAEFPTOC function used instead of traditional earth-fault protection in networks with low fundamental frequency components.
Covers differential protection, including line differential and transformer differential protection.
Describes the LNPLDF function for phase segregated line differential protection of distribution network lines and cables.
Explains the TR2PTDF function for protecting two-winding transformers and generator-transformer blocks.
Details the LREFPNDF function based on the numerically stabilized differential current principle.
Describes the HREFPDIF function for restricted earth-fault protection of generators and power transformers.
Covers unbalance protection functions.
Explains the NSPTOC function for protecting electric motors from phase unbalance.
Details the PDNSPTOC function used for detecting unbalance situations caused by broken conductors.
Describes the PREVPTOC function used to detect reversed phase connection to a three-phase motor.
Covers voltage protection functions.
Explains the PHPTOV function for protecting power system elements from excessive voltages.
Details the PHPTUV function used to disconnect devices damaged by low voltage conditions.
Describes the ROVPTOV function used for earth-fault protection in networks where residual overvoltage can reach non-acceptable levels.
Explains the NSPTOV function used to detect negative sequence overvoltage conditions.
Details the PSPTUV function used to detect positive sequence undervoltage conditions.
Covers the FRPFRQ function for protecting network components against abnormal frequency conditions.
Explains the LSHDPFRQ function for performing load shedding based on underfrequency and rate of change of frequency.
Details the ARCSARC function for detecting arc situations in air insulated metal-clad switchgears.
Describes the STTPMSU function for protecting motors from excessive starting time and locked rotor conditions.
Explains the MAPGAPC function used as a general protection with flexible measuring and setting facilities.
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