Siemens SIPROTEC 5 7KE85 Fault Recorder & Power Quality Measurement Unit

The Siemens SIPROTEC 5 7KE85 is a powerful and flexible fault recorder and power quality measurement device designed for comprehensive monitoring of electrical power systems. Built on the advanced SIPROTEC 5 platform, it enables accurate recording, analysis, and evaluation of disturbances across the entire energy value chain, from generation to distribution.

The 7KE85 combines fault recording, Phasor Measurement Unit (PMU), and power quality monitoring in a single device. It captures high-resolution analog and binary data during system events such as short circuits, voltage fluctuations, and switching operations. This allows engineers to analyze faults, improve system performance, and enhance grid reliability.

With support for IEC 61869-9 process bus (Sampled Values) and IEC 61850 communication, the relay integrates seamlessly into modern digital substations. Its modular design and flexible configuration make it suitable for utilities, industrial plants, and critical infrastructure.

The device is engineered using the DIGSI 5 platform, providing easy configuration, advanced automation, and detailed analysis tools. With built-in cybersecurity and high data accuracy, the SIPROTEC 5 7KE85 ensures reliable and secure monitoring of complex power systems.

Technical Specifications / Features

Fault Recording & Monitoring

• High-performance fault recorder for disturbance analysis
• Records analog and binary signals with high precision
• Event-based and continuous recording (fast-scan & slow-scan)
• Sequence-of-events (SOE) recording for system tracking
• Supports COMTRADE format for data analysis

Power Quality Measurement

• Power quality analysis as per IEC 61000-4-30
• Monitoring of voltage dips, harmonics, and frequency variations
• Enables long-term trend and performance analysis

Phasor Measurement Unit (PMU)

• Integrated PMU functionality (IEEE C37.118 compliant)
• Real-time synchrophasor measurement
• Wide-area monitoring and grid stability analysis

System & Application Features

• Suitable for MV, HV, and EHV systems and power plants
• Monitors:
  • Short circuits and fault conditions
  • Power quality disturbances
  • Generator dynamics and switching operations
• Enables root cause analysis and system optimization

Hardware & Design

• Modular SIPROTEC 5 architecture
• Up to:
  • 40 analog channels
  • 43 binary inputs
  • 33 binary outputs
• High sampling rate (1 kHz to 16 kHz)
• Large internal storage (~16 GB) for data recording
• Conformal coating for harsh environments

Communication & Integration

• IEC 61850 compliant (digital substation ready)
• Supports IEC 61869-9 Sampled Values (process bus)
• Ethernet-based communication with GOOSE messaging
• Time synchronization via IEEE 1588 (PTP), IRIG-B, SNTP
• Integration with DIGSI 5 and SICAM analysis tools

Cybersecurity & Reliability

• Role-based access control (RBAC)
• Secure firmware and communication protocols
• Reliable data storage and archiving even during power loss

Additional Features

• Flexible trigger logic (analog, binary, GOOSE-based)
• Trend and continuous recording for long-term monitoring
• Lossless data compression for efficient storage
• Easy configuration and operation via DIGSI 5