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SIPROTEC-7SJ80
Overcurrent protection – SIPROTEC 7SJ80
- Stock status:
- In stock
- Manufacturer:
- Siemens
- Product code:
- SIPROTEC-7SJ80
Main documents
Related products
| Hardware | |
| transformers | 4 current transformers |
| Product Description | The SIPROTEC 7SJ80 relays can be used for feeder protection of high and medium-voltage networks with grounded, low-resistance grounded, isolated or a compensated neutral point. The relays have all the required functions to be applied as a backup relay to a transformer differential relay. |
| Product family | mv digital protection relays power analyzersOther |
| binary inputs | 3/7/11 binary inputs (thresholds configurable using software) |
| Product | |
| binary outputs | 5/8 binary outputs (2 changeover / form C contacts) |
| life contact | 1 life contact |
| Pluggable | Pluggable current and voltage terminals.Show prices |
| Inrush restraint | Inrush restraint |
| Trip-circuit | Trip-circuit supervision (74TC) |
| Additional Product Information | |
| Display | 6-line display |
| USB | USB front port |
| Ports | 2 additional communication ports |
| 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-7SJ80
The SIPROTEC-7SJ80 is a versatile relay designed for feeder protection in high and medium-voltage networks. It supports various grounding systems, including grounded, low-resistance grounded, isolated, or compensated neutral points. Additionally, it serves as an effective backup relay to transformer differential relays, ensuring robust protection across power systems.
Key Features and Specifications:
- Flexible Protection Functions: The SIPROTEC 7SJ80 allows users to create up to 20 additional protection functions, enabling specialized applications such as frequency change protection or reverse power protection.
- Integrated Control and Automation: It supports circuit breaker control and other switching devices. The relay includes automation functions, which can be customized through the programmable logic (CFC) feature. This allows for creating specific functions, such as switchgear automation and interlocking.
- User-Defined Messaging: Users can generate customized messages, improving monitoring and communication within the system.
Hardware Specifications:
- Current Transformers: Equipped with 4 current transformers.
- Voltage Transformers: Supports 0 or 3 voltage transformers.
- Binary Inputs: Configurable with 3, 7, or 11 binary inputs, adjustable through software for specific operational thresholds.
- Binary Outputs: Available with 5 or 8 binary outputs, including 2 changeover (form C) contacts**.
- Life Contact: Includes a dedicated life contact for system status monitoring.
- Pluggable Terminals: Features pluggable current and voltage terminals for easy installation and maintenance.
The SIPROTEC-7SJ80 relay is designed to be highly adaptable, making it suitable for diverse protection schemes and applications. Its advanced features and flexibility enable users to tailor the relay for specific needs, enhancing the overall efficiency and safety of power networks.
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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