Overview
Multi-core twisted shielded round wire is a specialized cable design combining multiple insulated conductors twisted together and wrapped in a conductive shielding layer. This construction balances flexibility with effective electromagnetic interference (EMI) protection, making it ideal for data transmission and sensitive instrumentation. Common in industrial automation and telecommunications, these wires typically feature copper conductors for optimal conductivity, with shielding options ranging from braided metal to foil layers. The round cross-section ensures uniform shielding coverage compared to flat cables.
Structure and Working Principle
The wire's core consists of individually insulated conductors (usually 7-19 strands) twisted in a helical pattern to minimize crosstalk. A dielectric layer separates these from the outer shielding, which may be spiral-wound or braided for flexibility. Shielding works via the Faraday cage principle: external EMI is absorbed by the conductive layer and grounded, while internal signals remain contained. Twist ratios and shielding coverage (typically 85-95%) determine performance at different frequencies.
Key Features
1. EMI/RFI Protection: Reduces signal degradation in electrically noisy environments like factories. 2. Flexibility: The twisted design allows repeated bending without conductor fatigue. 3. Durability: Outer jackets (often PUR or PVC) resist oils, abrasion, and UV exposure. Shielding effectiveness is measured in decibels (dB), with high-performance variants offering 60-100 dB attenuation. Temperature ratings commonly range from -40°C to 105°C depending on materials.
Application Areas
Primary applications include: - Industrial Ethernet (PROFIBUS, EtherCAT) - Robotics and servo motor connections - Medical imaging equipment - Aerospace avionics In automotive systems, these wires transmit sensor data while resisting ignition noise. For audio systems, they prevent hum in balanced microphone lines. Military specifications often require dual-layer shielding for critical communications.
Maintenance and Precautions
Regularly inspect for shield integrity using continuity testers. Frayed shielding drastically reduces effectiveness. Avoid compression fittings that may crush the dielectric layer. When terminating, ensure proper grounding of the shield at one end to prevent ground loops. Use strain reliefs at connection points to prevent conductor fatigue. In corrosive environments, specify tinned copper shields for longevity.
B2B Procurement Guide
Key specifications to confirm: 1. Conductor size (AWG) and strand count 2. Shielding type (foil, braid, or composite) 3. Compliance standards (e.g., UL 2547, MIL-DTL-17) 4. Minimum bending radius (typically 5-10x cable diameter) Bulk buyers should request sample testing for attenuation and flex life. MOQs for custom configurations often start at 1,000 meters. Lead times vary by shielding complexity – standard designs ship in 2-4 weeks.
Related Manufacturers
- 主营：电线电缆、特种电缆、船用电缆、石油平台电缆
- 主营：二手中央空调回收、充电桩回收、变压器回收、发电机组回收、电缆线回收、空调回收、整厂设备回收、食品设备回收、电脑回收、电池回收、电子产品销毁、化工厂设备拆除、机房电池回收、电子设备回收、拆除业务、机房设备回收、制药厂拆除回收、电镀厂设备回收、制药设备回收
- 主营：注塑机、直燃机、废电缆、电力电房、回收空调、二手箱变、水冷柜机、电缆电线、二手电柜、电缆回收、变压器拆除、变电站回收、电缆线回收、二手电缆线、配电房设备、螺杆式空调、二手发电机、二手配电柜、电子厂设备、二手压铸机、高压配电室、制药厂设备
- 主营：机组空调、中央空调、电缆回收、电缆线回收、二手设备收购、酒店设备回收、溴化锂机组回收、变压器回收、发电机回收、工厂设备回收、工厂整体回收
- 主营：四氟板、密封填料、戈尔盘根、油浸石棉、密封材料、四氟弹性带、泥状软填料、陶瓷纤维带、石墨接地线、柔性接地电缆、高压石墨盘根、法兰滤网垫片、硅酸铝纤维绳、陶瓷纤维防火布、柔性石墨复合板
- 主营：扭转疲劳试验机、电子万能试验机、材料扭转试验机、线材扭转缠绕试验机、弯曲试验机、卧式拉力机、疲劳试验机、压力试验机、冲击试验机
- 主营：铝排、铝管、铝棒、多股铜丝、铝丝、铜管、铜棒、铜排、铜丝、铜板、耐候板、纯铁棒、纯铁板、无缝铝管、锻造铝管、保温铝板、花纹铝板、镀膜铝丝、铝镁合金丝、黄铜带、黄铜棒、黄铜管、黄铜排、铜套、瓦楞铝板
- 主营：电缆轴盘、电线电缆盘、钢盘电线盘、铁木圆线盘电缆盘、出口盘线缆盘具、铁木盘电缆线盘、电缆铁木盘、实木电缆盘
- 主营：拉伸试验机、万能试验机、拉力试验机、多通道疲劳试验机、线材缠绕试验机、缠绕扭转试验机、压缩弯曲试验机、弹簧试验机、弹簧拉压试验机、疲劳试验机、弹簧疲劳试验机、减震器疲劳试验机、万能拉力试验机、压力试验机、扭转试验机、线材扭转试验机、材料扭转试验机、电子扭转试验机、反复弯曲试验机
- 主营：[]
- 主营：拉力试验机、扭力试验机、扭转试验机、多通道疲劳试验机、弹簧疲劳试验机、拉簧拉伸测试机、反复弯曲试验机、弹簧扭力测试机、钢筋弯曲试验机、链条疲劳试验机、传动轴扭转试验机、绝缘子弯曲扭转试验机、5KN拉力机、万能材料拉力试验机、悬架簧疲劳试验机、汽车转向杆总成疲劳、电液伺服疲劳试验机