Especialisadong Solusyon sa Voltage Transformer para sa High-Speed Railway AT Power Supply System: Pinaka-Importante ang Malakas na EMI Immunity

18yrs 500-1000 employees 108000m²+m² US$150,000,000+ China

Especial na Solusyon sa Voltage Transformer para sa High-Speed Railway AT Power Supply System: Nakatuon sa Malakas na EMI Immunity

Ang electromagnetic environment sa high-speed railway AT (Auto-Transformer) power supply system mahalagang komplikado. Ang malakas na electromagnetic interference (EMI) direktang nakakaapekto sa accuracy ng pagsukat ng voltage transformers ug reliability sa sistema. Kini nga solusyon nakatuon sa karon nga core challenge pinaagi sa pagbuhat og dedicated voltage transformer nga naghimo sa 27.5kV single-phase power supply standard, nagpadala og solid nga foundation alang sa energy metering ug relay protection sa high-speed railways.

Pangunahong Teknolohikal nga Breakthrough: Triple Defense Laban sa EMI Storms

μ-Metal Alloy Triple Electromagnetic Shield:

Structure: Gigamit ang tulo ka independent na inner, middle, ug outer shielding shells gihimo gikan sa high-permeability μ-metal alloy.
Efficacy: Efektibong absorb/block ang low-frequency strong magnetic field interference gikan sa 27.5kV overhead contact line ug high-frequency transient EMI gikan sa system switching operations. Ang core sensing element efektibong giprotektahan, nagensure sa signal purity.

27.5kV Dedicated Single-Phase Structural Design:

Precise Matching: Ang magnetic circuit ug windings gi-deeply optimized alang sa 27.5kV power-frequency single-phase characteristics, nageliminate sa phase-to-phase crosstalk effects ug nagehance sa absolute accuracy sa single-point measurement.
Stability: Special materials ug processes nagsiguro sa pagreduce sa core saturation risk, nagguarantee sa transient response speed ug waveform reproduction capability.

Vibration Resistance Enhancement (5-200Hz, 2g Acceleration):

Simulation-Driven: Gigamit ang FEA (Finite Element Analysis) aron simularon ang complex vibration spectra sa trackside locations (kasama ang characteristic vibrations gikan sa mga passing CRH trains).
Reinforcement Solution: Ang internal core components gigi-secure pinaagi sa elastic silicone potting. Ang external housing gigamit ang high-strength alloy ug anti-vibration structural elements, nagensure nga zero connection loosening/displacement sa long-term mechanical impact aron consistent accuracy.

CRH Standard Communication Interfaces (RJ45 + TNC):

Dual Assurance: Ang RJ45 interface nagprovide og standardized digital communication batas sa mature Ethernet physical layer. Ang redundantly designed TNC interface (coaxial connector) nagensure og highly reliable transmission sa critical analog/digital signals sa extreme interference.
Immunity Capability: Ang interface circuits may built-in multi-layer EMC protection (TVS, filtering). Ang ports compliant sa rigorous IEC 61000-4 series standards for surge ug EFT immunity.

Key Performance Indicators: Hardware Commitment to Accuracy & Reliability

Parameter	Performance Indicator	Test Standard / Notes
Rated Voltage	27.5kV / √3V (Phase Voltage)	-
Accuracy Class	0.2S	Complies with GB/T 20840.1 / IEC 61869-1
Temperature Drift	≤ ±0.002%/K	Stability throughout full operating range (-40℃ ~ +70℃)
Electrical Fast Transient (EFT)	4kV (Peak)	Meets IEC 61000-4-4 Level 4
Power Frequency Withstand	Per GB/T 20840 / IEC standards	-
Partial Discharge	≤ 10pC @ 1.2 Ur	IEC 60270

Environmental Resilience: The Robust Guardian at Trackside

Protection Class: IP65 - Comprehensive protection against dust ingress ug high-pressure water jets, impervious sa rain, snow, wind, ug sand.
Operating Temperature: -40℃ ~ +70℃ - Wide-temperature materials ug special processes selected aron suportahan ang extreme seasonal climate challenges sa tanang rehiyon sa China, nagensure sa consistent performance.
Installation: Designed for trackside pole o compact substation environments, featuring a compact structure for easy installation ug maintenance.

07/07/2025

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