IEEE PC37.111/D4, Jan 2012 is a draft standard for Common Format for Transient Data Exchange, widely known as COMTRADE, in power systems. It addresses how transient and disturbance records are organized so they can be shared and interpreted consistently across equipment and software. For engineers working with power, energy, and related components or systems, this document helps support reliable data exchange, analysis, and comparison of event records during testing, commissioning, and fault investigation.

About IEEE PC37.111/D4, Jan 2012

This draft standard defines a common technical framework for transient data exchange in electrical power applications. IEEE PC37.111/D4, Jan 2012 is relevant where disturbance recordings must be exchanged without ambiguity between relays, recorders, analysis tools, and engineering teams. By focusing on the COMTRADE format, it supports a more consistent way to capture waveform and event information, which can improve interoperability and reduce interpretation issues when reviewing system behavior or comparing measurements from different sources.

Where is IEEE PC37.111/D4, Jan 2012 used?

IEEE PC37.111/D4, Jan 2012 is typically used in power-system environments where transient records are collected and reviewed, such as substations, protection engineering workflows, and utility troubleshooting. It is relevant to relaying, disturbance monitoring, and fault analysis tools that depend on a common file structure for exchanging captured data. The standard also supports testing and validation activities in electrical equipment and system studies where consistent record formats are important for comparing results across platforms.

Importance in practice

In practice, this standard helps reduce errors when transient data moves between devices, software, and technical teams. IEEE PC37.111/D4, Jan 2012 supports more consistent compliance checking, record review, and post-event analysis by giving users a shared format for exchange. That can improve confidence in fault investigations, protection performance assessment, and acceptance testing. For organizations handling power-system disturbance data, a clear common format also helps limit conversion problems and supports more dependable engineering decisions.

• COMTRADE transient data exchange
• Power-system disturbance records
• Protection and fault analysis
• Interoperable data handling
• Draft standard, inactive status