Siemens Reyrolle 7SR10 Overcurrent and Earth-Fault Protection Relay

ARP IMPEX supplies and exports Siemens Reyrolle 7SR10 Overcurrent and Earth-Fault Protection Relays for medium-voltage feeders, industrial switchgear, compact substations and electrical distribution projects. We supply the relay against the required Siemens article number and technical configuration.

The Siemens Reyrolle 7SR10 Argus is a numerical protection relay used for phase overcurrent, earth-fault and feeder protection. It can be used as the main protection relay for incoming and outgoing feeders or as backup protection for transformers, motors, generators and busbar systems.

The range includes non-directional models for straightforward radial distribution systems and directional models for ring networks, parallel feeders and systems where fault current can flow from more than one direction. Models with voltage inputs can also provide voltage, frequency, power and directional protection functions.

The 7SR10 combines protection, circuit-breaker control, measurement, fault recording and communication in one compact device. This makes it suitable for new protection panels as well as the replacement of older numerical or electromechanical relays.

Buyers looking for a Siemens Reyrolle 7SR10 relay supplier in India can send the complete ordering code, CT and VT details, auxiliary voltage, communication requirement and quantity for price and availability.

Technical Specifications

• Brand: Siemens
• Product family: Reyrolle Argus
• Series: 7SR10
• Product type: Numerical overcurrent and earth-fault protection relay
• Main application: Feeder protection and backup protection
• Available versions: Non-directional and directional
• Common models: 7SR1002, 7SR1003 and 7SR1004
• Current inputs: Four CT inputs
• CT secondary options: 1 A and 5 A
• Voltage inputs: Available on directional models
• Binary inputs: Model-dependent configurations
• Binary outputs: Model-dependent configurations, including relay health contact
• Protection characteristics: Definite-time and inverse-time curves
• Display: Backlit LCD
• Indication: Fixed and programmable front LEDs
• Local communication: Front USB port
• Remote communication: RS485 available on selected versions
• Communication protocols: IEC 60870-5-103, Modbus RTU and DNP3 serial, depending on the model
• Setting groups: Multiple setting groups, depending on the version
• Circuit-breaker control: Local and remote open/close control
• Mounting: Flush-mounted panel construction
• Configuration software: Siemens Reydisp software
• Auxiliary supply: Depends on the selected ordering code
• Optional protection: Conformal-coated versions are available for selected requirements

The exact number of binary inputs, outputs, communication ports and protection functions depends on the complete Siemens part number.

Available Siemens Reyrolle 7SR10 Models

Siemens Reyrolle 7SR1002

The 7SR1002 is a non-directional overcurrent and earth-fault relay for standard feeder and backup protection duties. It suits panels that need basic protection, circuit-breaker control and a limited number of binary inputs and outputs.

Siemens Reyrolle 7SR1003

The 7SR1003 provides non-directional overcurrent and earth-fault protection with additional binary inputs and outputs. It is selected where the panel requires more breaker-status contacts, alarms, interlocks or external trip signals.

Siemens Reyrolle 7SR1004

The 7SR1004 includes current and voltage inputs. It provides directional overcurrent and earth-fault protection along with voltage, frequency and power-related functions.

This version is commonly considered for ring distribution networks, parallel feeders, interconnected systems and installations with captive or renewable power generation.

Main Protection Functions

Depending on the selected version, the Siemens Reyrolle 7SR10 can provide:

• Instantaneous phase overcurrent protection
• Time-delayed phase overcurrent protection
• Earth-fault protection
• Sensitive earth-fault protection
• Directional overcurrent protection
• Directional earth-fault protection
• Thermal overload protection
• Negative-phase-sequence protection
• Broken-conductor detection
• Undercurrent protection
• Cold-load pickup
• Circuit-breaker failure protection
• Trip-circuit supervision
• Closing-circuit supervision
• Protection lockout
• External trip initiation
• Undervoltage and overvoltage protection on applicable models
• Frequency and power protection on applicable models

Directional, voltage and power functions are available only on suitable models with voltage inputs. The protection package should always be checked against the complete ordering code.

Features

• Combines overcurrent and earth-fault protection in one relay
• Non-directional and directional versions are available
• Suitable for feeder protection and equipment backup protection
• Works with 1 A or 5 A protection CT circuits
• Definite-time and inverse-time curves support relay coordination
• Sensitive earth-fault protection is available for low fault-current applications
• Cold-load pickup helps prevent unnecessary trips when restoring a feeder
• Thermal monitoring helps protect against prolonged loading
• Negative-sequence protection identifies phase imbalance
• Broken-conductor protection helps detect open-phase conditions
• Multiple setting groups suit changing network operating conditions
• Circuit-breaker open and close control is available from the relay
• LCD provides access to measurements, settings and fault information
• Programmable LEDs give clear trip and alarm indication
• Front USB access simplifies commissioning and data retrieval
• RS485 communication is available for SCADA and remote monitoring
• Event, fault and waveform records help with post-trip analysis
• Compact construction suits new panels and retrofit projects
• Conformal-coated models are available for demanding environments

Applications

Siemens Reyrolle 7SR10 Overcurrent and Earth-Fault Relays are commonly used for:

• Medium-voltage incoming feeders
• Medium-voltage outgoing feeders
• Industrial electrical distribution panels
• Utility distribution substations
• Compact substations
• Cable feeder protection
• Overhead-line feeder protection
• Ring distribution networks
• Parallel feeder systems
• Transformer backup protection
• Motor backup protection
• Generator backup protection
• Busbar backup protection
• Captive power plants
• Solar and wind power substations
• Oil and gas electrical networks
• Refineries and petrochemical plants
• Steel and cement plants
• Mining and mineral-processing facilities
• Water and wastewater plants
• Railway and infrastructure power systems
• Protection-panel retrofit projects
• Replacement of older protection relays

The relay is suitable for buyers requiring a numerical overcurrent relay for MV switchgear, an earth-fault protection relay for industrial substations or a directional feeder protection relay for ring networks.

Selecting the Correct Siemens 7SR10 Relay

The Siemens 7SR10 should not be selected only by the series name. The required model depends on whether the application needs directional protection, voltage inputs, additional binary contacts or remote communication.

For proper selection, check:

• Complete Siemens article number
• Non-directional or directional protection requirement
• System voltage
• Feeder or backup-protection application
• CT ratio and CT secondary current
• VT ratio, where applicable
• Auxiliary supply voltage
• Number of binary inputs and outputs
• Sensitive earth-fault requirement
• Circuit-breaker control requirement
• Trip- and close-circuit supervision requirement
• Communication protocol
• RS485 communication requirement
• Conformal coating requirement
• Quantity and delivery country

For replacement enquiries, share a clear photograph of the existing relay nameplate, the complete Siemens part number and the available wiring or setting information.

Siemens Reyrolle 7SR10 Supplier and Exporter in India

ARP IMPEX is an independent supplier and exporter of Siemens Reyrolle protection relays in India. We supply Reyrolle 7SR10 Overcurrent and Earth-Fault Relays for switchgear manufacturers, panel builders, EPC contractors, utilities and industrial maintenance companies.

Buyers searching for a Siemens 7SR10 overcurrent relay exporter, a Reyrolle feeder protection relay supplier, a Siemens 7SR1004 directional relay or an MV earth-fault protection relay can send the exact ordering code for quotation.

For price and availability, share:

• Complete Siemens part number
• Required relay model and configuration
• CT, VT and auxiliary supply details
• Communication requirement
• Required quantity
• Delivery location or destination country