Siemens SIPROTEC 5 7SA82 Distance Protection Relay

Siemens SIPROTEC 5 7SA82 Distance Protection Relay Suppliers,Exporters in India

ARP IMPEX is a supplier and exporter of Siemens SIPROTEC 5 7SA82 Distance Protection Relays in India. We supply against exact Siemens part-number requirements for transmission and distribution lines, utility substations, industrial power networks, protection-panel upgrades and replacement projects.

The SIPROTEC 7SA82 is selected where a line requires dedicated distance protection in a compact relay. It can protect overhead lines, underground cables and feeder circuits in medium-voltage and high-voltage systems.

This relay supports three-pole tripping and has a minimum tripping time of 19 ms. It is suited to radial lines, circuits fed from one or both ends, parallel lines and open or closed ring networks.

The distance-protection function identifies the faulted section from the measured current, voltage and line impedance. Several distance-protection methods are available, including classic distance protection, the reactance method and impedance protection for transformer applications. Directional overcurrent functions can provide backup protection when required.

The 7SA82 is also useful in isolated and compensated-neutral networks. Applicable configurations can detect steady, intermittent and transient earth faults through sensitive current, harmonic and admittance-based methods. This makes the relay relevant for industrial and utility systems where conventional earth-fault protection may not give enough selectivity.

Fault Locator Plus helps the maintenance team estimate the position of a fault, including on routes containing different line sections. Targeted automatic reclosing of overhead-line sections is also available through the AREC function.

Unlike the modular 7SA86 and 7SA87 models, the 7SA82 uses a compact, fixed hardware arrangement. It is a practical choice where four current inputs, four voltage inputs and the available binary contacts are sufficient for the approved protection scheme.

For Siemens SIPROTEC 7SA82 price and availability, send the complete Siemens article number, required quantity and destination country.

Technical Specifications

• Brand: Siemens
• Product family: SIPROTEC 5
• Model: 7SA82
• Product type: Numerical distance protection relay
• Primary use: Protection of overhead lines, cables and feeder circuits
• Voltage application: Medium-voltage and high-voltage systems
• Trip arrangement: Three-pole tripping
• Minimum tripping time: 19 ms
• Current inputs: Four CT inputs
• Voltage inputs: Four VT inputs
• Binary inputs: 11 or 23, depending on the hardware version
• Binary outputs: 9 or 16, depending on the hardware version
• Housing width: One-third of a 19-inch rack
• Display: Small or large front display
• Hardware construction: Compact, non-expandable base module
• Engineering software: Siemens DIGSI 5
• Board protection: Standard conformal coating
• Device access: Browser-based access to operating and diagnostic information
• Compatibility: Applicable interoperability with SIPROTEC 4 and SIPROTEC 5 line-protection devices

The 7SA82 does not accept the smaller SIPROTEC 5 expansion modules. The selected binary I/O, display, supply voltage, communication interface and protection functions must therefore be confirmed from the complete MLFB.

Available Protection Functions

The ordered Siemens 7SA82 configuration may include:

• Phase and earth distance protection
• Classic distance-protection characteristics
• Reactance-method distance protection
• Transformer impedance protection
• Directional phase overcurrent protection
• Directional earth-fault protection
• Sensitive earth-fault protection
• Intermittent earth-fault protection
• Teleprotection for distance protection
• Weak-infeed echo and tripping
• Circuit-breaker failure protection
• Power-swing blocking
• Out-of-step protection
• Automatic reclosing
• Synchrocheck
• Voltage and frequency protection
• Underfrequency load shedding
• Fault location
• Trip-circuit supervision
• Programmable control and interlocking

Some of these functions are optional. The model name “7SA82” alone does not confirm the complete protection package supplied in the relay.

Features

• Compact distance protection relay for MV and HV networks
• Protects overhead lines and underground cable circuits
• Suitable for radial, parallel, ring and double-end-fed networks
• Three-pole tripping for line fault protection
• Directional overcurrent protection for backup duties
• Sensitive earth-fault protection on applicable configurations
• The fault-location function helps identify the affected line section
• Automatic reclosing available for overhead-line applications
• Can provide backup protection for transformers, generators and motors
• Compatible with applicable SIPROTEC 4 and SIPROTEC 5 protection schemes
• Compact housing suits new panels and retrofit projects
• Conformal-coated electronics support demanding site conditions
• DIGSI 5 engineering and communication options
• Suitable for new installations and replacement requirements

Applications

Siemens SIPROTEC 5 7SA82 Distance Protection Relays can be used for:

• Medium-voltage line protection
• High-voltage line protection
• Overhead transmission lines
• Overhead distribution lines
• Underground cable circuits
• Mixed cable and overhead-line routes
• Radial feeder protection
• Lines supplied from one end
• Lines supplied from two ends
• Parallel line protection
• Open ring networks
• Closed ring networks
• Meshed industrial power networks
• Utility transmission substations
• Utility distribution substations
• Industrial substations
• Captive power plants
• Renewable-energy evacuation lines
• Transformer feeder backup protection
• Generator and motor backup protection
• Line differential backup protection
• Substation extension projects
• Distance-relay replacement projects

The 7SA82 is particularly relevant where the customer needs a compact Siemens distance protection relay with three-pole tripping, fault location and directional backup functions.

Siemens 7SA82, 7SL82 and 7SA87 Selection

These Siemens models serve different line-protection requirements.

The SIPROTEC 7SA82 provides compact distance protection with three-pole tripping.

The SIPROTEC 7SL82 combines line differential protection with distance protection. It is used when differential protection is required as the main protection method and distance protection is also needed within the same device.

The SIPROTEC 7SA87 is a modular distance-protection relay with both one-pole and three-pole tripping. It is more relevant for high-voltage transmission schemes requiring phase-selective operation and expandable hardware.

The correct model should follow the approved line-protection scheme. These devices should not be selected only by comparing their model numbers.

Details Required for a Siemens 7SA82 Quotation

For an accurate offer, please share:

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

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

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

Siemens SIPROTEC 5 7SA82 Supplier and Exporter in India

ARP IMPEX supplies Siemens SIPROTEC 5 7SA82 Distance Protection Relays for utilities, transmission companies, EPC contractors, panel builders, switchgear manufacturers, power plants and industrial users.

We handle enquiries for Siemens 7SA82 distance relays, three-pole line protection relays, overhead-line distance protection, cable protection, directional backup protection and replacement of existing Siemens numerical relays.

The Siemens SIPROTEC 7SA82 price depends on the complete article number, binary I/O arrangement, supply voltage, display, communication interface, enabled protection functions and ordered quantity.

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