Overhead Transient Recorder Type Remote Fault Indicator
JYL-ZT
The JYL-ZT Transient Recorder Type Fault Indicator consists of a collection unit and an aggregation unit. The collection unit has the capability of fault waveform recording and low-power wireless networking, which allows it to upload fault information to the aggregation unit via a local wireless network. Subsequently, the aggregation unit reports the fault information in real-time to the main station positioning system, where the main station processes the information and completes the graphical location display.
Main functions and characteristics

1) High-Resistance Ground Fault Detection: By employing high-precision waveform recording technology, it captures the faint transient signals of high-resistance ground faults, achieving highly sensitive detection.

2) High-Precision Sampling: Utilize high-speed sampling technology (typically at the MHz level) to record the transient current and voltage waveforms at the moment of fault occurrence.

3) Fault Waveform Recording: Preserve the complete waveform data before and after the fault for subsequent analysis and fault diagnosis.

4) Multi-Channel Waveform Recording: Support synchronous waveform recording of multiple signals (such as three-phase current, zero-sequence current, voltage, etc.), providing comprehensive fault information.

5) Fault Distance Estimation: Based on waveform data and combined with line parameters, it estimates the distance to the fault point.

6) Remote Transmission of Waveform Data: Upload detailed information such as fault waveforms, fault types, and fault times to the backend system for further analysis.

7) Fault Data Recording: Record data such as the time, type, and waveform of the fault occurrence for subsequent analysis and fault diagnosis.

8) Fault Type Identification: Automatically identify fault types (such as short circuit, ground fault, line break, etc.) through waveform data and intelligent algorithms.

9) Fault Cause Analysis: Assist in analyzing the causes of faults (such as lightning strikes, tree contact with lines, etc.) by combining waveform characteristics and historical data.

Technical parameter
  • 1. Applicable Occasions
    1) Applicable Voltage: 6 - 35 kV
    2) Neutral Grounding Mode: Suitable for various grounding modes
    3) Applicable Conductor Types: Overhead insulated and bare conductors ranging from 35 mm² to 240 mm²
  • 2. Power Supply
    1) Main Power Supply: Line-derived power (1A, 3A or 5A for full-function operation)
    2) Backup Power Supply: Single-use lithium battery 3.6V/8.5Ah (Optional for other specifications); Supercapacitor endurance operation time>12 hours
  • 3. Power Consumption
    Static: ≤80 µA
  • 4. Telemetry Accuracy
    Current: 0-200A, Measurement Accuracy: ±1A; 200A - 600A, Measurement Accuracy: ±0.5%
  • 5. Sampling Frequency
    Fault Waveform Recording: ≤12.8 kHz
  • 6. Fault Detection
    1) Identifiable Fault Types: Phase-to-phase short circuit, various types of single-phase ground faults; transient faults and permanent faults
    2) Minimum Reclosing Identification Time: 0.2s
  • 7. Line Status Indication
    1) Indication Type: High-brightness LED, 360° omnidirectional
    2) Continuous Flashing Time After Power Loss: >2000 h
    3) Fault Reset Method: Timed automatic reset, with a time configurable range of 1 to 48 h; automatic reset upon power restoration and remote manual reset
  • 8. Local Communication Method
    1) Frequency Band: 430–480 MHz
    2) Communication Distance: >50 m
    3) Transmission Power Consumption: <25 mA@+10 dBm
    4) Reception Power Consumption: <3 mA
    5) Communication Rate:150 kbps
  • 9. Mechanical Characteristics
    1) Weight: <1.5Kg
    2) Degree of Protection: IPX7
  • 10. Operating Environment
    1) Operating Temperature: -40°C - 70°C
    2) Humidity: 10% - 100%
  • 11. Service Life
    1) Operating Life: >8 years
    2) Mean Time Between Failures (MTBF): ≥70 000 h
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