The SIPROTEC 7SD82 line differential protection has been specifically designed particularly for the cost-optimised and compact protection of lines in medium and high-voltage systems. With its flexibility and the high-performance DIGSI 5 engineering tool, the SIPROTEC 7SD82 device offers future-oriented solutions for protection, control, automation, monitoring, and Power Quality – Basic.

At a glance

• Differential protection for medium and high-voltage applications
• Interoperability of SIPROTEC 4 and SIPROTEC 5 line protection devices
• 3-pole, minimum tripping time 19 ms
• Inputs and outputs
  • 4 current transformers, 4 voltage transformers, 11 or 23 binary inputs, 9 or 16 binary outputs
• Two different structures for binary inputs and outputs available in 1/3 base model, available with large or small display

Benefits

• Compact and low-cost overcurrent protection
• Safety due to powerful protection functions
• User-friendly design for easy handling of devices and software
• Cybersecurity according to NERC CIP and BDEW Whitepaper requirements (such as logging security-related events and alarms)
• Highest availability even under extreme environmental conditions by standard coating of the modules
• Full compatibility between IEC 61850 Editions 1, 2.0 and 2.1

Applications

• Line protection for all voltage levels with 3-pole tripping
• Phase-selective protection of overhead lines and cables with single-ended and multi-ended infeed of all lengths with up to 6 line ends
• Transformers and compensating coils in the protection zone
• Detection of ground faults in isolated or arc-suppression-coilground power systems in star, ring, or meshed arrangement
• Serial protection communication with SIPROTEC 5 and SIPROTEC 4 devices over different distances and physical media, such as optical fibre, two-wire connections, and communication networks
• Phasor Measurement Unit (PMU)
• Detection and recording of power-quality data in the medium voltage and subordinate low-voltage power system