Siemens SIPROTEC 5 7SA86 Distance Protection Relay

Siemens SIPROTEC 5 7SA86 Distance Protection Relay Suppliers,Exporters in India

ARP IMPEX is a supplier and exporter of Siemens SIPROTEC 5 7SA86 Distance Protection Relays in India. We handle requirements for overhead-line protection, underground cable circuits, transmission substations, industrial power networks, panel upgrades and replacement of existing Siemens relays.

The Siemens 7SA86 is a modular distance protection relay for lines that require fast three-pole fault clearance. It can be used on radial lines, circuits fed from one or both ends, parallel feeders and open or closed ring networks. Siemens specifies a minimum tripping time of 9 ms.

Unlike the compact 7SA82, the 7SA86 allows the panel designer to expand the current inputs, voltage inputs, binary contacts and communication interfaces. This makes it more relevant for larger line-protection panels where the project needs additional breaker contacts, alarms, interlocks or redundant communication channels.

Distance protection can serve as the main protection for the line or provide backup to a line differential scheme. The relay can also cover backup protection duties for transformers, generators, motors and busbars, depending on the selected function package.

The 7SA86 is not limited to straightforward phase-fault protection. Applicable configurations can detect earth faults in isolated and arc-suppression-coil networks, including intermittent and transient earth faults that may be difficult to identify with a basic overcurrent relay.

Fault-location functions help estimate the affected line section after a trip. Automatic reclosing, synchrocheck and breaker-control functions can also be included where the approved line-protection scheme requires them.

Siemens DIGSI 5 is used for relay settings, logic and commissioning. The relay has an integrated Ethernet interface and can accept up to four plug-in communication modules for IEC 61850 and other supported protocols.

For Siemens SIPROTEC 7SA86 price and availability, share the complete Siemens article number, required quantity and destination country.

Technical Specifications

• Brand: Siemens
• Product family: SIPROTEC 5
• Model: 7SA86
• Product type: Modular numerical distance protection relay
• Primary application: Protection of overhead lines and underground cables
• Main protection: Distance protection
• Trip arrangement: Three-pole tripping
• Minimum tripping time: 9 ms
• Distance measuring loops: Six independent measuring loops
• Standard hardware versions: 12 predefined variants
• Analogue inputs: 4 current/4 voltage or 8 current/8 voltage inputs
• Binary inputs: 5 to 31, depending on the hardware
• Binary outputs: 8 to 46, depending on the hardware
• Housing width: From one-third to two full 19-inch rack widths
• Hardware design: Modular and expandable SIPROTEC 5 construction
• Engineering software: Siemens DIGSI 5
• Communication: Integrated Ethernet with optional plug-in modules
• Communication modules: Up to four
• IEC 61850: Reporting and GOOSE communication
• Automatic reclosing: Three-pole reclosing on applicable configurations
• Control: Circuit-breaker control, synchrocheck and interlocking
• Recording: Fault, event, disturbance and power-quality records
• Environmental protection: Conformal-coated electronic modules

The actual input arrangement, display, housing size, auxiliary supply, communication ports and enabled protection functions depend on the complete Siemens MLFB.

Protection Functions

Depending on the ordered configuration, the Siemens SIPROTEC 7SA86 can provide:

• Phase and earth distance protection
• Classic distance-protection characteristics
• Reactance-method distance protection
• Impedance protection for transformer applications
• Directional overcurrent backup protection
• Sensitive earth-fault protection
• Intermittent and transient earth-fault detection
• Pulse-method ground-fault detection
• Power-swing blocking
• Out-of-step protection
• Current-transformer saturation detection
• Circuit-breaker failure protection
• Three-pole automatic reclosing
• Fault-location functions
• Arc protection
• Undervoltage and overvoltage protection
• Underfrequency load shedding
• Active- and reactive-power protection
• Synchrocheck and switching supervision
• Programmable tripping and interlocking logic

The model name alone does not confirm every protection function. The required function package must be checked against the complete Siemens ordering code.

Features

• Fast three-pole distance protection for electrical lines
• Suitable for overhead lines, underground cables and mixed routes
• Works on radial, parallel, ring and double-end-fed networks
• Modular inputs and outputs suit simple or complex panels
• Six independent distance-measuring loops
• Directional backup protection can be included
• Detects different types of earth faults in isolated and compensated networks
• Power-swing blocking helps avoid incorrect operation during grid disturbances
• Fault-location functions support faster line inspection
• Automatic reclosing is available for overhead-line applications
• Can work as a backup to line differential protection
• Up to four communication modules can be installed
• Supports communication with applicable SIPROTEC 4 and SIPROTEC 5 devices
• IEC 61850 options support modern substation automation
• Redundant communication using PRP or HSR is available
• PMU and basic power-quality functions can be included
• Conformal coating supports operation in demanding site conditions
• Suitable for new protection panels, extensions and relay replacement

Applications

The Siemens SIPROTEC 5 7SA86 Distance Protection Relay is used for:

• High-voltage transmission lines
• Medium-voltage distribution lines
• Overhead-line distance protection
• Underground cable protection
• Mixed overhead-line and cable routes
• Lines fed from one end
• Lines fed from two ends
• Parallel transmission lines
• Open ring networks
• Closed ring networks
• Meshed industrial power systems
• Utility transmission substations
• Utility distribution substations
• Industrial substations
• Captive power plants
• Grid interconnection lines
• Renewable-energy evacuation lines
• Transformer feeder backup protection
• Generator and motor backup protection
• Backup protection for line differential schemes
• Substation protection-panel expansion
• Replacement of older Siemens distance relays

The 7SA86 is a practical choice where a compact fixed-hardware relay does not provide enough inputs, outputs or communication interfaces. It is also relevant for utilities moving from older SIPROTEC line relays to a modular SIPROTEC 5 platform.

Siemens 7SA82, 7SA86 and 7SA87

The three models belong to the Siemens SIPROTEC distance protection range, but they cover different panel and tripping requirements.

• SIPROTEC 7SA82: Compact distance protection with fixed hardware and three-pole tripping
• SIPROTEC 7SA86: Modular distance protection with expandable hardware and three-pole tripping
• SIPROTEC 7SA87: Modular distance protection with one-pole and three-pole tripping

The 7SA86 is normally considered when the protection scheme requires expandable I/O, more communication options or a larger control arrangement, but does not require single-pole tripping.

Information Required for Quotation

For an accurate Siemens 7SA86 quotation, share:

• Complete Siemens article number or MLFB
• Required quantity
• Destination country
• Required communication interface, where specified

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

If the article number is unavailable, share the existing relay model and confirm whether the protected circuit is an overhead line, underground cable or mixed line route.

Siemens SIPROTEC 5 7SA86 Supplier and Exporter in India

ARP IMPEX supplies Siemens SIPROTEC 5 7SA86 Distance Protection Relays for utilities, EPC contractors, switchgear manufacturers, panel builders, power plants and industrial users.

We handle enquiries for Siemens 7SA86 distance protection relays, three-pole transmission-line relays, overhead-line protection, underground cable protection, IEC 61850 distance relays and replacement of existing Siemens numerical relays.

The Siemens SIPROTEC 7SA86 price depends on the complete article number, analogue inputs, binary I/O, housing size, communication modules, function package and ordered quantity.

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