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high flexibility flat cable

15 Min Read
Non-earthed IT (Isolated Terra) power systems represent a deliberate design choice in heavy industrial applications—particularly in port machinery, mining equipment, and large festoon crane systems—where operational continuity is paramount. Unlike the grounded (TN or TT) systems standard in most commercial buildings, IT systems are engineered to tolerate single-phase earth faults without automatic shutdown. 非接地IT(隔离接地)电源系统代表了重工业应用中的一个刻意设计选择——特别是在港口机械、采矿设备和大型自动供电起重机系统中——其中运营连续性至关重要。与大多数商业建筑中标准的接地(TN或TT)系统不同，IT系统经过设计，可以在单相接地故障时继续运行而不需要自动断电。
Technical Department
on05/03/2026

Earth Fault Protection: The Need for 3.3/3.3kV Rating on German Flat PROTOLON Cables

Non-earthed IT (Isolated Terra) power systems represent a deliberate design choice in heavy industrial applications—particularly in port machinery, mining equipment, and large festoon crane systems—where operational continuity is paramount. Unlike the grounded (TN or TT) systems standard in most commercial buildings, IT systems are engineered to tolerate single-phase earth faults without automatic shutdown. 非接地IT(隔离接地)电源系统代表了重工业应用中的一个刻意设计选择——特别是在港口机械、采矿设备和大型自动供电起重机系统中——其中运营连续性至关重要。与大多数商业建筑中标准的接地(TN或TT)系统不同，IT系统经过设计，可以在单相接地故障时继续运行而不需要自动断电。
21 Min Read
The PVC-FLACH-CY 5X4X0.5mm² shielded flat control cable has a minimum dynamic bending radius of 72–108 millimeters when calculated across standard industrial practice. This specification is expressed as a ratio to the cable's physical thickness, which in this case is 7.2 millimeters. The 72–108mm range corresponds to 10–15 times the cable thickness (10× T to 15× T, where T represents thickness). However, for equipment that will experience millions of flexure cycles over its operational lifetime—such as festoon systems on overhead cranes or umbilical lines on material handling equipment—Feichun's engineering team recommends 110 millimeters as the practical standard, which equals approximately 15.3× the cable thickness. This conservative specification provides a meaningful safety margin that protects against the cumulative effects of repeated flexing, preventing both immediate mechanical failure and the gradual degradation of the copper shield wires that could compromise electromagnetic compatibility performance.
Technical Department
on04/03/2026

Minimum Dynamic Bending Radius for PVC-FLACH-CY 5X4X0.5mm² Shielded Control Cable: Complete Design Guide

The PVC-FLACH-CY 5X4X0.5mm² shielded flat control cable has a minimum dynamic bending radius of 72–108 millimeters when calculated across standard industrial practice. This specification is expressed as a ratio to the cable’s physical thickness, which in this case is 7.2 millimeters. The 72–108mm range corresponds to 10–15 times the cable thickness (10× T to 15× T, where T represents thickness). However, for equipment that will experience millions of flexure cycles over its operational lifetime—such as festoon systems on overhead cranes or umbilical lines on material handling equipment—Feichun’s engineering team recommends 110 millimeters as the practical standard, which equals approximately 15.3× the cable thickness. This conservative specification provides a meaningful safety margin that protects against the cumulative effects of repeated flexing, preventing both immediate mechanical failure and the gradual degradation of the copper shield wires that could compromise electromagnetic compatibility performance.