Siemens Reyrolle 7SR120 Relay – Overcurrent and Feeder Protection

The Siemens Reyrolle Argus 7SR120 Directional Protection Relay is a reliable and advanced solution designed to ensure safe and efficient operation of power systems. Built with numerical protection technology, this relay provides accurate measurement and dependable performance for directional overcurrent (OC) and earth fault (EF) protection. With its 1/4xI and 3xV inputs, the 7SR120 Argus offers precise monitoring, fault detection, and selective tripping, making it an essential choice for industrial, utility, and commercial applications.

In Mumbai’s growing industrial and power distribution sector, the Siemens Reyrolle Argus 7SR120 is trusted for its durability, flexibility, and easy integration into modern electrical networks. Its user-friendly interface, advanced communication protocols, and proven Siemens engineering make it a preferred choice for substations, feeders, and protection panels.

As an authorized Siemens Reyrolle relay supplier in Mumbai, we provide genuine products, competitive pricing, and fast delivery to meet your project requirements. Our technical team ensures complete support from product selection and installation guidance to after-sales service—so you can rely on seamless protection and long-term performance.

Function

Protection Functions

• Undercurrent (37)
• Broken Conductor (46BC)
• Negative Phase Sequence Overcurrent (46NPS)
• Thermal Overload (49)
• Overcurrent (50, 51)
• Earth Fault (50G, 50N, 50SEF, 51G, 51N, 51SEF)
• Directional Control of Overcurrent & Earth Fault (67)
• High Impedance REF (64H)
• Under/Over Voltage (27/59)
• Negative Phase Sequence Voltage (47)
• Voltage Controlled Overcurrent (51V)
• Neutral Voltage Displacement (59N)

Supervision Functions

• CT Supervision (60CTS)
• Trip & Close Circuit Supervision (74T/CCS)
• VT Supervision (60VTS)
• Inrush Detector (81HBL2)
• Circuit Breaker Fail (50BF)

Control Functions

• Auto Reclose (79)

Monitoring Functions

• Primary/Secondary Current, Phases and Earth Direction
• Primary/Secondary Line and Phase Voltages
• Apparent Power and Power Factor
• Real and Reactive Power
• W Hr & VAr Hr – Forward and Reverse
• Historical Demand Record
• Positive Phase Sequence (PPS) Voltage & Current
• Negative Phase Sequence (NPS) Voltage & Current
• Zero Phase Sequence (ZPS) Voltage

Main Features

• Cold Load Settings
• Four Settings Groups
• Password Protection (2 levels)
• User Programmable Logic
• Self Monitoring
• Circuit Breaker Trip Counter and Timer
• Fault, Event and Waveform Records

Whether you are an EPC contractor. A panel builder, or utility provider in Mumbai. The Siemens Reyrolle Argus 7SR120 offers the right balance of protection, reliability, and cost-effectiveness.

Buy Siemens Reyrolle Argus 7SR120 Relay in Mumbai today from a trusted supplier and secure your power systems with proven Siemens technology.