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General| Current Rating | 1 A or 5 A |
|---|---|
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Standard | IEC 60255 |
| Rated Frequency | 50 Hz or 60 Hz |
| Frequency | 50/60 Hz |
| Protection Functions | Overcurrent, earth fault |
| Overcurrent Protection Stages | Up to 4 stages (Definite time and Inverse time) |
| Setting Ranges (Earth Fault) | 0.02 - 2.0 x In |
| Time Characteristics | Definite Time |
| Burden (Current Circuit) | < 0.1 VA at In |
| Burden (Voltage Circuit) | < 0.1 VA at Vn |
| Communication Protocols | IEC 61850 |
| Communication Interfaces | RS485, Ethernet |
| Display | LCD |
| Ingress Protection | IP54 (Front) |
| Mounting | DIN rail mounting |
Identifies the specific relays applicable to this manual.
Explains the common platform design across the 7SR5 series.
Details the digital processing, galvanic isolation, and measurement capabilities.
Describes current and voltage input types, configurations, and connections.
Details the types, programmability, and functionality of binary I/O.
Explains USB and RS485 serial communication interfaces.
Covers redundant Ethernet ports for remote communication.
Introduces the device's functions like protection, supervision, control, etc.
Details the device's dependency on analogue input configuration.
Explains the modular concept of Function Groups and Elements.
Describes the three startup modes and the process.
Explains the importance of time synchronization and its configuration.
Details the components and operation of the device's front panel.
Explains how to parameterize basic device operating functionality.
Covers configuration of all CT and VT inputs.
Describes the types and configuration of binary input functions.
Details the types, programming, and configuration of binary output functions.
Explains how stored data is categorized and managed.
Covers compatibility with control systems and PCs via various interfaces.
Explains the feature allowing users to input up to 16 logic equations.
Introduces configuration protection, supervision, control functions.
Summarizes available functions based on analogue inputs.
Explains how to enable/disable function groups and elements.
Describes blocking tripping during sustained heavy reverse load current flow.
Details detecting high flux values in transformers and V/f characteristics.
Explains monitoring permissible voltage and decoupling systems on supply loss.
Covers parameters for single-phase undervoltage protection.
Explains detecting loss of current flow and protecting pumps.
Details detecting negligible current flow in the system earth connection.
Describes detecting 1-phase or 2-phase short circuits and protecting machines.
Explains detecting open circuit primary conductors and providing alarms.
Covers monitoring symmetrical positive sequence voltage and unbalance.
Provides thermal overload protection parameters and curves.
Details short circuit detection and high-speed overcurrent protection.
Covers instantaneous/time-delayed earth fault protection.
Explains calculated instantaneous/time-delayed earth fault protection.
Details time overcurrent protection for short circuit detection and coordination.
Covers time-delayed earth fault detection and coordination.
Provides parameters for calculated time-delayed earth fault protection.
Monitors neutral point voltage displacement and phase unbalance.
Covers parameters for single-phase overvoltage protection.
Provides discriminative graded protection based on fault current direction.
Monitors CB status and issues backup trip signal if CB fails to operate.
Detects open circuit CT connections and provides alarms.
Detects loss of voltage supply due to VT fuse operation and provides alarms.
Monitors wiring integrity of CB close coil and alarms open circuits.
Monitors wiring integrity of CB trip coil and alarms open circuits.
Blocks operation of selected functions during transformer switch-in conditions.
Covers open/close control, status monitoring, counters, and alarms.
Details CB open/close control, status monitoring, and operation counters.
Explains that measurands are recorded from analogue inputs.
Lists various measured quantities like current, voltage, frequency, power, energy.
Contains notes on specific instrument measurements and settings.
Outlines general procedures and precautions for commissioning and maintenance.
Details testing of binary inputs and outputs.
Explains how to check phase sequence and its impact on directional protection.
Checks proper connection and direction of current and voltage transformers.
Verifies correct polarity of earth current and voltage for directional earth faults.
Details procedures for testing circuit breaker operation and related signals.
Covers testing the integration and operation of CB failure protection.
Aligns configuration settings with transformer vector group and earthing for correct operation.
Focuses on testing polarity connection of earth point current transformers.
Details procedures for testing each protection function using secondary injection.
Outlines testing procedures for supervision functions.
Explains testing of logic equations and their interaction with other functions.
Provides general electrical and operational data for the device.
Lists parameters and values for the 21LB load blinder function.
Details common settings and characteristics for overexcitation protection.
Lists parameters for 3-phase undervoltage protection.
Provides parameters for single-phase undervoltage protection.
Details parameters for phase undercurrent protection.
Lists parameters for measured earth fault undercurrent detection.
Covers definite and inverse time negative-sequence overcurrent parameters.
Details settings for detecting broken conductors based on current ratios.
Covers parameters for sequence overvoltage protection.
Provides thermal overload protection parameters and curves.
Lists parameters for instantaneous phase overcurrent protection.
Details parameters for 3-pole CB failure protection.
Lists parameters for measured instantaneous earth fault protection.
Provides parameters for calculated instantaneous earth fault protection.
Lists parameters for time-delayed phase overcurrent protection.
Covers time-delayed earth fault detection and coordination.
Provides parameters for calculated time-delayed earth fault protection.
Lists parameters for voltage-dependent overcurrent protection.
Details parameters for neutral voltage displacement protection.
Covers parameters for single-phase overvoltage protection.
Lists parameters for CT supervision using current reference.
Details parameters for VT supervision.
Lists parameters for directional overcurrent protection.
Covers parameters for directional earth fault protection.
Details parameters for sensitive directional earth fault detection.
Provides parameters for calculated directional earth fault protection.
Lists parameters for frequency protection.
Details parameters for detecting inrush current.
Covers parameters for detecting overfluxing via 5th harmonic.
Details parameters for high-impedance restricted earth fault protection.
Lists parameters for biased transformer differential protection.
Covers parameters for highset transformer differential protection.
Provides product descriptions and order numbers for relays and accessories.
Illustrates CT connections for a 2-winding transformer.
Illustrates VT configuration settings and connections.
