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Siprotec-7SJ82
Overcurrent and feeder protection – SIPROTEC 7SJ82
- Stock status:
- In stock
- Manufacturer:
- Siemens
- Product code:
- Siprotec-7SJ82
Main documents
Related products
| Hardware | |
| transformers | 4 current transformers |
| voltage | 0 / 3 voltage transformers |
| Product family | mv digital protection relays power analyzersOther |
| binary inputs | 3 / 7 binary inputs (thresholds configurable using software) |
| Product | |
| binary outputs | 5 / 8 binary outputs (2 changeover) |
| life contact | 1 life contact |
| Pluggable | Pluggable current and voltage terminals. |
| time-overcurrent | Directional time-overcurrent protection, ground (67N) |
| Trip-circuit | Trip-circuit supervision (74TC) |
| Additional Product Information | |
| Forward-power | Forward-power, reverse-power protection (32) |
| Rate-of-voltage | Rate-of-voltage-change protection (27R/59R) |
| Rate-of-frequency | Rate-of-frequency-change protection (81R) |
| programmable | 9 programmable function keys |
| Secondary current transformer values | Secondary current transformer values (1 A / 5 A) settable using DIGSI |
| Binary input | Binary input thresholds settable using DIGSI (3 stages) |
| Pluggable | Pluggable current and voltage terminals |
| frequency | Rate-of-frequency-change protection (81R) |
| voltage | Rate-of-voltage-change protection (27R/59R) |
| reclosing | Automatic reclosing (79) |
| Voltage dependent | Voltage dependent inverse-time overcurrent protection (51V) |
| Directional | Directional intermittent ground fault protection (67Ns) |
Product Description
Siemens
Siemens, a global leader in the electrical and industrial automation sectors, is renowned for its high-quality products and solutions, ranging from electrical equipment and automation systems to energy management and telecommunications technologies.
With a strong focus on innovation, Siemens provides cutting-edge solutions that enhance operational efficiency, sustainability, and productivity across various industries. From advanced circuit breakers and switchgear to smart grid solutions, Siemens continues to shape the future of technology, delivering reliable and energy-efficient products that meet the evolving needs of businesses and industries worldwide.
Reyrolle Siemens protection relays are designed for reliable and efficient safeguarding of electrical distribution systems. Known for their precision, durability, and advanced technology, these relays ensure the highest standards of safety and protection in industrial and commercial applications.
Siprotec-7SJ82
The SIPROTEC-7SJ82 is an advanced, cost-effective, and compact overcurrent protection relay designed by Siemens. It is ideal for protecting feeders, lines, and capacitor banks in medium-voltage and high-voltage systems. With its flexibility and compatibility with the powerful DIGSI 5 engineering tool, the SIPROTEC-7SJ82 provides future-ready solutions for protection, control, automation, monitoring, and basic power quality (PQ) management.
Key Features and Specifications
- Comprehensive Overcurrent Protection: Suitable for feeders and lines across all voltage levels, ensuring reliable protection for various power system configurations, including star networks, parallel lines, and ring systems.
- Hardware Flexibility: The device offers different hardware configurations for binary inputs and outputs, accommodating various application requirements. It can be equipped with:
- 4 current transformers and 4 voltage transformers (optional)
- 11 or 23 binary inputs and 9 or 16 binary outputs
- Alternatively, 8 current transformers, 7 binary inputs, and 7 binary outputs
- Compact Design: The device features a 1/3 × 19-inch housing width, making it compact and easy to install in various setups. Available with large or small displays, it can be adapted to different operational needs.
Powerful Protection Functions:
- Short Circuit and Ground Fault Detection: Effectively detects and selectively trips short circuits in electrical equipment, handling infeed at one or two ends, as well as parallel lines and ring systems.
- Backup Protection: Provides backup protection for differential protection devices, safeguarding lines, transformers, generators, motors, and busbars.
- Capacitor Bank Protection: Monitors and protects simple capacitor banks to ensure stable operation.
- Reverse-Power Protection: Prevents reverse power flow, enhancing system reliability.
- Load Shedding: Supports automatic load shedding applications, ensuring stable power supply during peak demand or system imbalances.
- Automatic Switchover: Facilitates automatic switching between power sources, improving system resilience.
- Transformer Control: Can regulate or control two-winding transformers, providing flexibility in power management.
- Phasor Measurement Unit (PMU): Includes PMU capabilities for precise measurement of electrical quantities, aiding in system analysis and monitoring.
- Power Quality Monitoring: Capable of acquiring and recording power quality data in medium and low-voltage networks, ensuring consistent monitoring of network performance and stability.
The SIPROTEC-7SJ82 relay offers a robust and versatile solution for overcurrent and feeder protection, ensuring reliable and cost-effective operation across a range of voltage levels. Its modular design, hardware flexibility, and advanced monitoring capabilities make it a versatile tool for modern power system management. With intuitive configuration via DIGSI 5, the SIPROTEC-7SJ82 enables efficient setup, control, and maintenance, making it suitable for both utility and industrial applications.
Frequently Asked Questions
What is SIPROTEC used for?
✅ SIPROTEC devices, including SIPROTEC 5, are designed for advanced protection, control, monitoring, and measurement in electrical energy systems. With modular hardware, flexible software, and the powerful DIGSI 5 engineering tool, they provide unmatched reliability and efficiency in industrial automation and energy applications.
What is SIPROTEC 4?
✅ SIPROTEC 4 represents Siemens' benchmark in digital protection technology, offering reliable solutions for diverse industrial and energy applications. It remains a trusted choice for safeguarding electrical systems with precision and efficiency.
What is SIPROTEC 5?
✅SIPROTEC 5 is a state-of-the-art protection, automation, and monitoring system developed by Siemens for use in electrical power systems. Designed with modular hardware and software architecture, SIPROTEC 5 devices provide advanced solutions for protection, control, measurement, and system monitoring in medium- and high-voltage networks.
What is Reyrolle?
✅ Reyrolle, originally a British engineering company, revolutionized the power industry by manufacturing innovative switchgear for power stations worldwide. Today, Siemens continues its legacy through the Reyrolle product range, which provides robust and reliable protection relays for modern energy systems.
What is the function of a digital relay?
✅ A digital relay, like Siemens SIPROTEC models, uses advanced microprocessors to analyze power system voltages, currents, and other parameters. These relays detect faults in electrical systems or industrial processes, ensuring efficient protection and control.
What are the disadvantages of a digital relay?
✅ Digital relays, despite their precision and versatility, have some drawbacks. These include susceptibility to electromagnetic interference, higher power consumption, and the need for regular maintenance to avoid contact wear. However, SIPROTEC relays are engineered to mitigate many of these issues, ensuring superior performance and reliability.
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