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SIPROTEC-7SJ85
Overcurrent and feeder protection – SIPROTEC 7SJ85
- Stock status:
- In stock
- Manufacturer:
- Siemens
- Product code:
- SIPROTEC-7SJ85
Main documents
| 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
Which is Better: Schneider or Siemens Circuit Breakers?
When comparing Schneider and Siemens circuit breakers, both brands offer unique strengths and advantages, making them top choices in the industry.
✅ Both Schneider and Siemens circuit breakers are excellent choices for protecting electrical systems. Schneider excels in versatility and precision engineering, while Siemens is known for its exceptional build quality and innovation. The choice between the two depends on specific needs and preferences, ensuring reliable protection and performance for any electrical system.
What are the three types of miniature circuit breaker?
✅Miniature Circuit Breakers (MCBs) are essential for protecting electrical circuits from overcurrents and short circuits. There are three primary types of MCBs: Type B, Type C, and Type D. Each type is designed to respond to different levels of electrical surges in various settings.ft starters minimize the initial surge of power during startup by gradually increasing the voltage supply. This controlled power-up process prevents the motor from overheating, reducing the risk of temporary shutdowns and significantly extending the lifespan and durability of the motors.
What's the difference between type B and C MCBs?
✅Type B devices are engineered to trip when fault currents reach 3-5 times the rated current (In). For instance, a 10A Type B device will trip at 30-50A. Type C devices, on the other hand, are designed to trip at fault currents of 5-10 times In, which means a 10A device will trip at 50-100A. Lastly, Type D devices are intended to trip at fault currents of 10-20 times In, so a 10A device will trip at 100-200A.
What size is a Schneider 3 pole MCB?
✅ The product dimensions are (W) 54mm x (H) 85mm x (D) 77.5mm, and it weighs 0.31kg. It adheres to the IEC 60529 standard, offering a degree of protection rated at IP20 and IP40 when enclosed.
What is the Full Name of MCBs?
✅MCB Full Form - Miniature Circuit Breaker
✅Miniature Circuit Breaker
The full form of MCB is Miniature Circuit Breaker. An MCB is a type of electronic switch that operates automatically. It detects issues within a circuit by identifying excessive current flow, providing protection by interrupting the circuit to prevent damage.
What Are Miniature Circuit Breakers?
✅ Miniature Circuit Breaker (MCB) - Definition, Types, and Uses
A Miniature Circuit Breaker (MCB) is a safety device equipped with an electro-mechanical mechanism that automatically interrupts the flow of excessive current in a circuit. Unlike fuses, MCBs can be reset and reused without manual replacement, enhancing safety and convenience in electrical systems.
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