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SIPROTEC-7SJ85
Overcurrent and feeder protection – SIPROTEC 7SJ85
- Stock status:
- In stock
- Manufacturer:
- Siemens
- Product code:
- SIPROTEC-7SJ85
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-7SJ85
The SIPROTEC-7SJ85 is a versatile and robust overcurrent protection relay, specifically designed for the protection of feeders, lines, and capacitor banks. With its modular structure and advanced engineering capabilities, this device provides comprehensive solutions for protection, control, automation, monitoring, and basic power quality (PQ) management across various voltage levels.
Key Features and Specifications
- Comprehensive Overcurrent Protection: The SIPROTEC-7SJ85 offers reliable protection for feeders and lines in all voltage ranges, making it a suitable choice for utility and industrial applications.
Modular Design and Hardware Flexibility:
5 predefined standard variants equipped with:
- 4 current transformers
- 4 voltage transformers
- 11 to 59 binary inputs
- 9 to 33 binary outputs
- The modular structure of the SIPROTEC 5 system allows for flexible adjustment and expansion of the I/O configuration. 1/6 expansion modules can be added as needed, enhancing its adaptability to different application scenarios.
- Available with a choice of large or small displays, or even without a display for applications where visual feedback is not required.
- Compact Housing: The device can be accommodated in a range of housing widths, from 1/3 × 19 inches to 2/1 × 19 inches, providing flexibility in panel installation and space utilization.
- Enhanced Safety: Features a range of powerful protection functions that ensure reliable operation and safeguard electrical systems against faults.
- User-Friendly Design: Offers intuitive device handling and straightforward software operation through the DIGSI 5 engineering tool, enabling efficient configuration and management of the protection system.
- Advanced Cybersecurity: Complies with NERC CIP and BDEW Whitepaper requirements, providing robust cybersecurity measures to protect against unauthorized access and ensure the integrity of the device and network.
- Reliable Performance Under Extreme Conditions: Designed for high availability, the SIPROTEC 7SJ85 uses a conformal coating on electronic boards, ensuring reliable operation even under harsh environmental conditions.
- Interoperability and Compatibility: Fully compatible with IEC 61850 Editions 1, 2.0, and 2.1, ensuring seamless integration with modern communication standards and simplifying network interoperability.
The SIPROTEC-7SJ85 relay combines advanced protection capabilities with flexibility and ease of use, making it an ideal solution for medium to high-voltage systems. With its ability to adapt to different configurations and applications, it provides a future-proof platform for power system protection and management, backed by Siemens’ expertise in reliable and secure engineering solutions.
Frequently Asked Questions
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 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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