Siemens Siprotec 4 SIPROTEC 7SD5 Protection Relay

Siemens Siprotec 4 SIPROTEC 7SD5 – 4xI 4xV, text or graphical display, up to 6 ends, Distance Protection, 1-/3-pole tripping.

The Siemens SIPROTEC 7SD5 relay is a high-performance line differential and distance protection solution. Additionally, now available in Mumbai for industrial and utility applications. Designed for fast and reliable tripping, it supports both single-pole and three-pole configurations. Moreover, it makes it ideal for transmission line protection and multi-terminal setups.

Equipped with 4xI and 4xV inputs, the SIPROTEC 7SD5 can handle up to six line ends, providing precise and adaptive protection for complex power networks. The relay features a graphical and text display, allowing easy monitoring, configuration, and operation for engineers and operators.

Trusted for high-speed and accurate line differential and distance protection, this relay ensures industrial reliability and safety. Customers in Mumbai can benefit from local delivery and expert support, making it the perfect choice for energy utilities, industrial facilities, and transmission network operators.

Key Features:

• Line differential and distance protection
• 4xI and 4xV inputs, up to 6 ends
• 1-/3-pole tripping configuration
• Graphical and text display for easy monitoring
• Multi-terminal support for complex network protection
• Fast and reliable tripping
• Available with expert support and delivery in Mumbai

Siprotec 7sd5 Relay Control Functions

• Commands for control of circuit-breakers (isolators)

Monitoring Functions

• Self-supervision of relay and protection data (R2R) communication
• Trip circuit supervision (74TC)
• Measured-value supervision
• Oscillographic fault recording
• Event logging/fault logging
• Switching statistics

Front Design

• User-friendly local operation
• PC front port for relay setting
• Function keys and 14 LEDs f. local alarm

Communication Interfaces

• 2 serial protection data (R2R) interfaces for ring and chain topology
• Front interface for connecting a PC
• System interface for connection to a control system via various protocols
  • IEC 61850 Ethernet
  • IEC 60870-5-103
  • PROFIBUS-FMS/-DP and DNP 3.0
• Rear-side service/modem interface
• Time synchronization via IRIG-B or DCF77, or system interface

Siemens SIPROTEC 4 leads the way in integrating protection, control, measurement, and automation functions in one device. The homogenous system platform, the unique DIGSI 4 engineering program, and extensive experience of more than a million successfully operating devices in the field worldwide.