Siemens SIPROTEC 5 Compact 7SK82 Motor Protection Relay

The Siemens SIPROTEC 5 Compact 7SK82 is a compact and cost-effective motor protection relay designed for small to medium-sized motors in industrial and utility applications. Built on the proven SIPROTEC 5 platform, it delivers reliable and fast protection while maintaining a simplified and space-saving design.

The relay provides essential motor protection functions, ensuring safe operation and protection against electrical and thermal faults. It is ideal for applications where standard protection is required with a compact footprint, making it suitable for panel installations with limited space.

With its predefined hardware configuration, the 7SK82 offers easy selection, quick installation, and simplified commissioning. It supports modern communication protocols and integrates seamlessly into digital substations and industrial automation systems.

Main Function

• Motor Protection (Small to Medium Motors)

Tripping

• 3-pole tripping
• Fast and reliable fault isolation

Technical Specifications

Protection & Functional Features

• Motor protection for:
  • Small motors
  • Medium-sized motors
• Protection functions include:
  • Thermal overload protection
  • Overcurrent protection
  • Earth fault protection
  • Negative sequence (unbalance) protection
  • Stall and locked rotor protection
• Ensures:
  • Safe startup and operation
  • Protection against overheating and electrical faults

Hardware & Compact Design

• Compact, fixed hardware design (non-modular)
• Predefined configuration for easy selection
• Typical configuration:
  • CT inputs: 4
  • VT inputs: 4
  • Binary inputs: ~11
  • Binary outputs: ~9
• Space-saving design for compact panels
• Cost-effective solution for standard applications

Communication & Protocols

• IEC 61850 compliant
• GOOSE messaging support
• Supports:
  • Modbus TCP
  • Standard communication interfaces
• Enables integration into automation systems

Engineering & Software

• Configurable via DIGSI 5
• Simplified parameterization and commissioning
• Standard application templates for quick setup

Advanced Features

• Reliable protection based on SIPROTEC 5 technology
• Basic monitoring and diagnostic functions
• Suitable for standard motor protection needs

Applications

• Industrial motor protection
• Pumps, fans, and compressors
• Manufacturing plants
• Small to medium motor-driven systems
• Utility auxiliary systems