In today’s modern world, a steady and uninterrupted supply of electricity is vital for numerous industries and everyday life.  To ensure the smooth functioning of power distribution systems, it is essential to have robust protection measures in place. Siemens introduces the state-of-the-art 7SR45 Reyrolle Overcurrent Protection Relay, a groundbreaking solution that guarantees the utmost reliability in power distribution networks. This advanced relay offers a comprehensive set of features and intelligent functionalities to effectively combat overcurrent scenarios, safeguarding electrical assets, and minimizing costly downtime.  In this blog post, we will explore the key features and Functions of the Siemens 7SR45 Reyrolle relay, highlighting its role in ensuring a secure and efficient power distribution system. But before we delve into the details, let’s understand the importance of reliable overcurrent protection and its significance in the realm of power distribution.

Brief About Siemens 7SR45 Reyrolle Overcurrent Protection Relay

Introducing the cutting-edge Reyrolle 7SR45 Argus relay, a highly advanced self-powered/dual-powered non-directional overcurrent and earth fault protection device. This innovative relay is designed with state-of-the-art hardware technology, offering a range of options tailored to specific requirements. These options include variations in current transformer (CT) compatibility, binary input/output configuration, power supply, and communication settings. The 7SR45 Reyrolle relay is equipped with cutting-edge features and intelligent functionalities that make it a preferred choice for power distribution systems. Its non-directional overcurrent protection capability allows for swift and accurate detection of overcurrent events, regardless of the current’s direction. This ensures timely intervention and minimizes the risk of electrical faults, such as short circuits or equipment failures.

The Reyrolle 7SR45 digital relay offers comprehensive protection against both definite time and inverse time overcurrent and earth fault incidents, guaranteeing high sensitivity with a minimum operating setting of 0.2 times the rated value for phase overcurrent protection. This relay is powered by current transformers (CTs) and can also be connected to an external auxiliary power source to enhance security. Moreover, it features a communication port that allows seamless integration with SCADA systems. The relay’s compact design, which does not require drawing out, conveniently places the navigation keys, LCD display, and a front USB port on the front fascia, ensuring user-friendly operation.

Features Of Siemens Reyrolle 7SR45 Numerical Relay:

• Self-powered / auxiliary powered
• 10 fault records
• 100 event records
• Password protection
• Self-monitoring
• Overcurrent protection functions (instantaneous and delayed)
• Relay integration via Reydisp Evolution PC Software
• Sensitivity of 20% nominal current
• Serial interface

Hardware

• 4 current transformer with 1 A or 5 A Inputs
• Up to 4 binary Inputs and 4 binary outputs
• 2 latched binary outputs, 1 changeover and 1 normally open
• 1 pulsed output
• 2 case options for mounting in various RMU’s

User Interface

• 16 character x 2 line backlit LCD
• Menu navigation keys
• 9 predetermined LED?s for easy use
• Mechanical flag
• Front USB interface
• Optional rear RS485 communication port

Protection Functions Of 7SR45 Reyrolle Overcurrent Protection

• 50 Instantaneous overcurrent – phase
• 50G Instantaneous earth fault – measured
• 50N Instantaneous earth fault – calculated
• 51 Time delayed overcurrent – phase
• 51G Time delayed earth fault – measured
• 50LC Line check/switch onto fault (SOTF)
• 51N Time delayed earth fault – calculated

Ancillary Functions

• 49T High speed external trip via binary input
• 68 Protection function blocking/Inrush current blocking
• 86 Lockout

Communications

• IEC 60870-5-103
• MODBUS RTU

Conclusion

In conclusion, the Siemens 7SR45 Reyrolle Overcurrent Protection Relay is a vital component in ensuring reliable power distribution. With its advanced features and functions, including definite time and inverse time overcurrent and earth fault protection, this relay offers exceptional sensitivity with a minimum operating setting of 0.2 times the rated value for phase overcurrent protection. Its CT-powered design, along with the option for an external auxiliary supply and a communication port for SCADA integration, provides added security and seamless monitoring capabilities. Furthermore, the compact non-draw-out design, with convenient front access to navigation keys, an LCD display, and a front USB port, makes it incredibly user-friendly. Invest in the Siemens 7SR45 Reyrolle Non-directional Overcurrent Protection Relay to ensure efficient and dependable power distribution in your system.

The 7SR45 Reyrolle Overcurrent Protection Relay is a well-established solution that improves the effectiveness and dependability of electric power systems, guaranteeing the secure and effective functioning of industrial installations. Our offerings extend beyond energy assessment, as we provide a diverse array of tailor-made solutions for industries and panel builders. Reach out to us at +917506112097 or send us an email detailing your requirements at [email protected]. We specialize in a wide range of products, including a selection of Siemens auxiliary relays renowned for their exceptional quality and reliability. To explore our collection of Siemens Numerical Relays further, Please Click here.