Siemens SIPROTEC 5 7SJ82 Feeder and Overcurrent Protection Relay
Siemens SIPROTEC 5 7SJ82 Feeder and Overcurrent Protection Relay Suppliers,Exporters in India
ARP IMPEX is a supplier and exporter of Siemens SIPROTEC 5 7SJ82 Feeder and Overcurrent Protection Relays in India. We handle requirements for medium-voltage switchgear, feeder protection panels, industrial substations, utility networks, capacitor-bank panels and replacement of existing Siemens relays.
The Siemens SIPROTEC 7SJ82 is a compact numerical relay used mainly for feeder, line and overcurrent protection. It can be applied to incoming feeders, outgoing feeders, overhead lines, underground cables, parallel feeders and ring distribution networks.
Depending on the ordered configuration, the relay can provide directional and non-directional overcurrent protection, earth-fault protection, voltage and frequency protection, automatic reclosing, circuit-breaker failure protection and switchgear control. Siemens also provides functions for simple capacitor-bank protection and backup protection duties.
The 7SJ82 can detect earth faults in isolated and compensated-neutral networks. Applicable configurations support intermittent earth-fault detection and other methods used where a standard earth-fault element may not provide enough information.
The relay combines protection, control, measurement, event recording and communication in one device. Siemens DIGSI 5 is used for settings, logic and commissioning. IEC 61850 and other communication options are available, depending on the complete article number.
Different 7SJ82 versions can have different current and voltage inputs, binary contacts, displays and communication modules. Buyers should therefore share the complete Siemens MLFB or article number before requesting a quotation.
For Siemens SIPROTEC 7SJ82 price, availability or export quotation, send the complete part number, required quantity and destination country.
Technical Specifications
- Brand: Siemens
- Product family: SIPROTEC 5
- Model: 7SJ82
- Product type: Feeder and overcurrent protection relay
- Main applications: Feeders, lines and simple capacitor banks
- Network use: Medium- and high-voltage systems
- Protection direction: Directional and non-directional
- Current inputs: Four or eight CT inputs, depending on the hardware
- Voltage inputs: Available on applicable configurations
- Binary inputs and outputs depend on the selected hardware version
- Rated frequency: 50/60 Hz
- Display: Small or large front display, depending on the model
- Engineering software: Siemens DIGSI 5
- Communication: Ethernet, serial or fibre-optic options
- IEC 61850: Available for substation communication
- Control functions: Circuit-breaker control and switchgear interlocking
- Logic: Programmable automation and control logic
- Recording: Fault, event and disturbance records
- Housing: Compact, non-expandable base-module construction
- Mounting: Protection, control and switchgear panels
The exact analogue inputs, binary contacts, display, communication ports and protection functions depend on the complete Siemens ordering code.
Main Protection Functions
Depending on the selected configuration, the Siemens SIPROTEC 7SJ82 can provide:
- Directional phase overcurrent protection
- Non-directional phase overcurrent protection
- Directional and non-directional earth-fault protection
- Sensitive earth-fault protection
- Intermittent earth-fault detection
- Undervoltage and overvoltage protection
- Underfrequency and overfrequency protection
- Frequency-change protection for load shedding
- Automatic reclosing
- Circuit-breaker failure protection
- Arc protection
- Synchrocheck and switching supervision
- Active- and reactive-power protection
- Backup protection for transformers, generators and busbars
- Capacitor-bank overload and unbalance protection
The enabled functions depend on the ordered relay configuration. A basic overcurrent-protection model may not include the same voltage, communication or capacitor-bank functions as another 7SJ82 version.
Features
- Combines feeder protection, control and monitoring in one compact relay
- Suitable for incoming and outgoing medium-voltage feeders
- Supports both directional and non-directional protection schemes
- Can protect lines supplied from one or both ends
- Suitable for radial, parallel and ring distribution networks
- Detects earth faults in isolated and compensated-neutral systems
- Intermittent earth-fault functions are available for applicable networks
- Automatic reclosing can support overhead-line feeder applications
- Fault-location functions are available on selected configurations
- Voltage and frequency protection can support load-shedding schemes
- Circuit-breaker failure protection provides backup tripping
- Programmable logic supports control and interlocking requirements
- DIGSI 5 is used for relay settings and commissioning
- IEC 61850 supports modern substation automation projects
- Fault and disturbance records help investigate relay operations
- Different hardware versions suit basic and more complex panels
- Suitable for new switchgear, retrofit projects and relay replacement
Capacitor-Bank Protection
The SIPROTEC 7SJ82 can also be configured for the protection and monitoring of simple capacitor banks.
Applicable functions include:
- Capacitor-bank overcurrent protection
- Capacitor-bank overload protection
- Current-unbalance protection
- Peak-overvoltage protection
- Differential protection
The required capacitor-bank functions and input arrangement must be confirmed against the complete Siemens article number.
Applications
Siemens SIPROTEC 5 7SJ82 Feeder Protection Relays are commonly used for:
- Medium-voltage incoming feeders
- Medium-voltage outgoing feeders
- Overhead distribution lines
- Underground cable feeders
- Radial distribution networks
- Ring distribution systems
- Parallel feeder protection
- Lines supplied from one or two ends
- Industrial substations
- Utility distribution substations
- Captive power plants
- Renewable-energy feeder connections
- Isolated-neutral networks
- Compensated-neutral networks
- Underfrequency load-shedding systems
- Automatic switchover schemes
- Simple capacitor-bank protection
- Transformer backup protection
- Generator backup protection
- Busbar backup protection
- Protection-panel retrofit projects
- Replacement of older Siemens overcurrent relays
ARP IMPEX supplies Siemens 7SJ82 Relays for feeder overcurrent protection, earth-fault protection, MV line protection, capacitor-bank protection and IEC 61850 substation projects.
Selecting the Correct Siemens 7SJ82 Relay
The description “Siemens SIPROTEC 7SJ82” does not identify a standard configuration. The current and voltage inputs, binary contacts, display and communication interfaces may differ between models.
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 rear terminal arrangement.
If the Siemens part number is unavailable, share the existing relay model and the main application, such as feeder protection, line protection, earth-fault protection or capacitor-bank protection.
Siemens SIPROTEC 5 7SJ82 Supplier and Exporter in India
ARP IMPEX supplies Siemens SIPROTEC 5 7SJ82 Feeder and Overcurrent Protection Relays for switchgear manufacturers, EPC contractors, panel builders, utilities, power plants and industrial maintenance companies.
We handle enquiries for:
- Siemens SIPROTEC 5 7SJ82 Protection Relays
- Medium-voltage feeder protection relays
- Directional overcurrent relays
- Earth-fault protection relays
- Overhead-line and cable protection relays
- Capacitor-bank protection relays
- Protection relays with IEC 61850
- Siemens relays for industrial substations
- Replacement Siemens numerical relays
- Feeder protection-panel retrofit requirements
The Siemens SIPROTEC 7SJ82 price depends on the complete article number, input arrangement, enabled protection functions, communication modules and ordered quantity.
Send the complete Siemens part number, required quantity and destination country for price, availability and export quotation.
