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SIPROTEC-7SK80
Overcurrent protection – SIPROTEC 7SJ80
- Stock status:
- Call for availability
- Manufacturer:
- Siemens
- Product code:
- SIPROTEC-7SK80
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
The SIPROTEC-7SK80 is a multi-functional motor protection relay specifically designed to protect asynchronous motors of various sizes. It ensures reliable operation and offers comprehensive functionality to safeguard motors in industrial and energy distribution applications. Additionally, it can be utilized as a backup relay for transformer differential protection, enhancing system security and reliability.
Key Features and Specifications:
- Flexible Protection Functions: The relay supports up to 20 user-defined protection functions, allowing for custom configurations, such as frequency change protection and reverse power protection.
- Automation and Control: It provides control over circuit breakers and other switching devices. The integrated **programmable logic (CFC) allows users to develop custom automation functions, including switchgear interlocking and other user-specific needs.
- User-Defined Messaging: Custom messages can be created for enhanced system communication, aiding in real-time monitoring and control.
Hardware Specifications:
- Current Transformers: Supports 4 current transformers.
- Voltage Transformers: Configurable with 0 or 3 voltage transformers.
- Binary Inputs: Offers 3 or 7 binary inputs, with software-configurable thresholds to adapt to different scenarios.
- Binary Outputs: Equipped with 5 or 8 binary outputs, including 2 changeover contacts.
- RTD Inputs: Optionally available with 0 or 5 RTD inputs, enabling additional monitoring.
- Life Contact: Includes a life contact for monitoring the relay’s operational status.
- Pluggable Terminals: Features pluggable current and voltage terminals for convenient installation and maintenance.
Motor and Transformer Protection:
- Motor Protection: The SIPROTEC 7SK80 is designed to protect induction-type asynchronous motors, ensuring smooth operation by safeguarding against various electrical anomalies.
- Transformer Protection: It serves as a backup protection device for transformers, incorporating features like inrush current suppression to prevent unnecessary trips during startup phases.
Summary
The SIPROTEC-7SK80 combines robust motor protection, flexible configuration options, and advanced automation features, making it ideal for diverse industrial and energy applications. Its adaptability and comprehensive design allow for effective system integration, ensuring safety and efficiency in motor operations and broader power distribution networks.
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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