Overhead External Signal-Type / Transient Characteristic-Type Remote Fault Indicator JYW/Z-HD
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Product Description
Product Overview
Currently, most distribution networks employ small-current grounding systems. When a single-phase ground fault occurs in such systems, the fault current is low and the fault characteristics are complex, making line selection and fault location for single-phase ground faults a persistent technical challenge in distribution network operation. Accurately identifying the grounded line and pinpointing the faulted section while maintaining continuous power supply remains a critical issue. The signal source detection method—specifically, the asymmetric current method—operates on the principle of leveraging the unique characteristics of single-phase ground faults in small‑current grounding systems: by detecting and analyzing the distinctive features of the asymmetric current signals generated on the faulted line, it enables both fault line selection and fault location.
Product Standards
Q/GDW436-2010 Technical Specifications for Distribution Line Fault Indicators
DL/T1157-2019 Technical Specifications for Distribution Line Fault Indicators
DL/T721-2013 Distribution Automation Remote Terminal
GB/T17626.2 Electromagnetic Compatibility – Testing and Measurement Techniques – Electrostatic Discharge Immunity Test
GB/T17626.3 Electromagnetic Compatibility – Testing and Measurement Techniques – Radio Frequency Electromagnetic Field Radiation Immunity Test
GB/T17626.5 Electromagnetic Compatibility Testing and Measurement Techniques – Test for Immunity to Fast Transient Pulse Groups
GB/T17626.8 Electromagnetic Compatibility – Testing and Measurement Techniques – Power Frequency Magnetic Field Immunity Test
GB/T17626.9 Electromagnetic Compatibility Testing and Measurement Techniques – Immunity Test to Pulse Magnetic Fields
GB/T17626.10 Electromagnetic Compatibility – Testing and Measurement Techniques – Immunity Test to Damped Oscillatory Magnetic Fields
Technical Features
1. The industry has applied the Roche loop to this type of indicator, resulting in good test linearity that is unaffected by wire diameter, thereby ensuring testing accuracy.
2. The energy‑harvesting module uses rust‑resistant, high‑permeability materials and is combined with a low‑power system design to ensure full‑function operation without batteries when the primary current is 2 A.
3. The system power supply adopts a three‑tier architecture featuring CT-based power extraction, capacitors, and a single-use lithium battery, ensuring reliable operation of the device around the clock.
4. The data acquisition unit features a high protection rating, withstands temperature shocks and prolonged immersion in water, ensuring reliable long‑term outdoor operation.
5. Both the aggregation unit and the acquisition unit can be remotely managed wirelessly.
Main Technical Parameters
Electromagnetic Compatibility Characteristics | Insulation resistance | ≥10 MΩ |
|
Power supply | Working power supply | AC 220V or 100V | |
Rated value | Current transformer | 5A, Power Consumption < 1.0 VA/Phase | |
Protection Performance Parameters | Instantaneous protection range | (20%~2000%) × In is continuously adjustable with a resolution of 0.01 A. | |
Protection Level | Stainless Steel 304 Outdoor Enclosure | No lower than IP54 | |
Mean Time Between Failures | Mean Time Between Failures | No less than 80,000 hours | |
Keywords:
Overhead External Signal-Type / Transient Characteristic-Type Remote Fault Indicator JYW/Z-HD
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East of the 22nd Avenue and south of Fengda Road, Zhengzhou Economic and Technological Development Zone
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