1. Key Functions of Fault Recorder Panel​

​​(1) Fault Recording & Analysis​
          Captures voltage/current waveforms during short-circuit, grounding, or line-break faults.
          Records pre-fault and post-fault data (seconds to minutes) for root cause analysis.

​​(2) Protection Device Verification​
          Logs relay and circuit breaker operation sequences to validate protection schemes (e.g., ANSI/IEEE C37.111 compliance).

​​(3) Power Quality Monitoring​
          Detects harmonics, voltage sags/swells, and frequency deviations per ​IEC 61000-4-30.

​2. Core Features of Fault Recorder Panel​

​​(1) Multi-Channel High-Speed Sampling​
          Supports simultaneous acquisition of analog (voltage/current via ​PT/CT) and digital inputs (breaker status, relay signals).
          Sampling rates range from ​kHz to MHz​ for transient analysis.

​​(2) Triggered Recording​
          Auto-activates upon thresholds (overcurrent, voltage distortion, frequency deviation) per ​IEEE 1344.

(3) Data Storage & Compression​
          Employs ​FIFO (First-In-First-Out) buffering; prioritizes fault data storage in ​COMTRADE format (IEEE C37.111)​.

​​(4) Time Synchronization​
          Uses ​GPS/IEEE 1588 (PTP)​​ or ​IRIG-B​ for μs-level synchronization across substations.

​​(5) HMI & Connectivity​
          Features touchscreen/buttons for waveform replay, setting adjustments, and report generation.
          Exports data via ​Ethernet, USB, or fiber optics​ to ​SCADA/EMS systems.

​3. Working Principle of Fault Recorder Panel​

​​(1) Signal Acquisition​
          ​PT/CT Isolation: Steps down HV/high-current signals to low-level inputs.
          ​A/D Conversion: Analog signals are filtered, amplified, and digitized by ​16-bit+ ADCs.

​​(2) Data Processing​
          ​Trigger Logic: Real-time monitoring via ​FPGA/DSP; triggers recording upon fault detection.
          ​Buffer Memory: High-speed ​RAM​ temporarily stores sampled data.

​​(3) Storage & Output​
          Timestamped data saved in ​COMTRADE​ format for compatibility .
          Supports ​IEC 61850​ communication for seamless grid integration.

​​(4) Redundant Power Supply​
          Dual feeds (AC/DC) ensure uninterrupted operation during faults.