Siemens SIPROTEC 5 7SX85 Universal Protection Relay

Siemens SIPROTEC 5 7SX85 Universal Protection Relay Suppliers,Exporters in India

ARP IMPEX is a supplier and exporter of Siemens SIPROTEC 5 7SX85 Universal Protection Relays in India. We handle requirements for transmission and distribution lines, utility substations, industrial power networks, protection-panel upgrades and replacement of existing Siemens numerical relays.

The Siemens SIPROTEC 7SX85 is a modular protection and control relay for power networks at different voltage levels. It can be configured for feeder protection, overhead-line and cable protection, line differential protection, motor and generator protection, and other substation applications.

Unlike a relay designed for one fixed duty, the 7SX85 can be built around the actual project requirement. The analogue inputs, binary contacts, communication modules and protection functions depend on the selected Siemens configuration.

For line protection projects, the relay can combine distance protection, line differential protection, earth-fault protection and circuit-breaker control. Applicable configurations also support single-pole and three-pole tripping, making the range suitable for different transmission and distribution schemes.

The 7SX85 can also cover motor, generator, feeder and backup protection requirements. This gives utilities and industrial users the option of using one relay platform across several panels while selecting different functions for each application.

Siemens DIGSI 5 is used for relay settings, logic and commissioning. IEC 61850 communication is available for integration with substation control and automation systems.

Buyers looking for Siemens SIPROTEC 5 7SX85 Relays can share the complete Siemens article number for price, availability and export quotation.

Technical Specifications

• Brand: Siemens
• Product family: SIPROTEC 5
• Model: 7SX85
• Product type: Modular universal numerical protection relay
• Main use: Protection, control and monitoring
• Network application: Transmission and distribution power systems
• Line protection: Distance and line differential protection on applicable configurations
• Tripping arrangement: Single-pole or three-pole, depending on the scheme
• Analogue inputs: Depend on the selected hardware
• Binary inputs and outputs depend on the ordered configuration
• Auxiliary supply: AC or DC, depending on the article number
• Engineering software: Siemens DIGSI 5
• Communication: Serial, Ethernet or fibre-optic options
• IEC 61850: Available on applicable configurations
• Control functions: Circuit-breaker control and switchgear interlocking
• Logic: User-programmable automation and control logic
• Recording: Fault, event and disturbance records
• Construction: Modular hardware arrangement

The exact protection functions, communication modules and input/output arrangement should be checked against the complete Siemens MLFB or article number.

Main Protection Functions

Depending on the ordered configuration, the Siemens SIPROTEC 7SX85 can provide:

• Directional and non-directional overcurrent protection
• Earth-fault protection
• Distance protection for overhead lines and cables
• Multi-ended line differential protection
• Motor and generator protection
• Undervoltage and overvoltage protection
• Underfrequency and overfrequency protection
• Load-shedding functions
• Synchrocheck and synchronising supervision
• Circuit-breaker failure protection
• Circuit-breaker control and interlocking
• Backup protection for transformers and busbars

The required functions should be confirmed before the quotation. A 7SX85 configured for multi-ended line differential protection will not have the same hardware and enabled functions as a relay selected for feeder or motor protection.

Features

• Combines protection, control and monitoring within one relay platform
• Suitable for transmission and distribution network applications
• It can protect overhead lines and underground cables
• Supports distance protection and line differential protection
• Multi-ended line protection is available on applicable configurations
• Single-pole and three-pole tripping options suit different network schemes
• Directional and non-directional protection functions are available
• Motor and generator protection can be included where required
• Voltage and frequency functions support network-management schemes
• Load shedding can be configured for utility and industrial power systems
• Synchrocheck supports controlled circuit-breaker closing
• Programmable logic supports switchgear control and interlocking
• DIGSI 5 is used for settings, engineering and commissioning
• IEC 61850 supports communication with modern substation systems
• Fault and disturbance records help engineers investigate relay operations
• Modular construction allows the device to match different project requirements
• Suitable for new installations, retrofit projects and protection-system upgrades
• Can be considered for replacement of older Siemens SIPROTEC relays

Applications

Siemens SIPROTEC 5 7SX85 Universal Protection Relays are commonly used for:

• Transmission-line protection
• Distribution-line protection
• Overhead power lines
• Underground cable feeders
• Multi-ended line differential schemes
• Distance protection schemes
• Medium-voltage substations
• High-voltage substations
• Utility power networks
• Industrial distribution systems
• Incoming and outgoing feeder panels
• Motor and generator protection
• Transformer backup protection
• Underfrequency load shedding
• Generator and grid synchronisation
• Renewable-energy feeder connections
• Switchgear control and interlocking
• Digital substation projects
  Protection-panel retrofit work
  Replacement of existing numerical relays

ARP IMPEX supplies Siemens SIPROTEC 7SX85 Relays for distance protection, line differential protection, feeder protection, motor and generator protection, and IEC 61850 substation projects.

Selecting the Correct Siemens 7SX85 Relay

The description “Siemens SIPROTEC 7SX85” does not identify a standard relay. Models can differ by analogue inputs, binary contacts, communication modules and enabled protection functions.

For an accurate quotation, share:

• Complete Siemens article number or MLFB
• Required quantity
• Destination country
• Communication requirement, where applicable

For replacement enquiries, also share clear photographs of the existing relay nameplate and terminal arrangement.

If the Siemens article number is unavailable, share the existing relay model and the main application, such as distance protection, line differential protection, feeder protection, motor protection or generator protection.

Siemens SIPROTEC 5 7SX85 Supplier and Exporter in India

ARP IMPEX supplies Siemens SIPROTEC 5 7SX85 Universal Protection Relays for utilities, switchgear manufacturers, EPC contractors, panel builders, power plants and industrial maintenance companies.

We handle enquiries for:

• Siemens SIPROTEC 5 7SX85 Universal Protection Relays
• Distance protection relays for overhead lines and cables
• Multi-ended line differential protection relays
• Transmission and distribution line protection relays
• Feeder protection and control relays
• Motor and generator protection relays
• Load-shedding and synchronising relays
• SIPROTEC relays with IEC 61850
• Replacement Siemens numerical relays
• Substation retrofit and modernisation requirements

The Siemens SIPROTEC 7SX85 price depends on the complete article number, selected hardware, protection functions, communication modules and ordered quantity.

Send the complete Siemens part number, required quantity and destination country for price, availability and export quotation.