Copper‑Core XLPE‑Insulated Copper‑Wire‑Braided‑Shielded Variable‑Frequency Power Cables

Product Name: Copper‑Core Cross‑Linked Polyethylene Insulated Copper‑Wire‑Braided‑Shielded Variable‑Frequency Power Cable

Models: BPYJVP, ZR‑BPYJVP

Application: Variable‑frequency power cables are specially engineered for electrical connection between variable‑frequency power supplies and variable‑frequency motors, which constitute the core power‑transmission link of frequency‑conversion drive systems. Meanwhile, this series of cables can also be deployed for general‑purpose power transmission and distribution circuits with a rated voltage of 1 kV or below. In modern industrial production, variable‑frequency drive technology has been widely adopted to regulate motor speed, reduce energy consumption, improve production‑process control accuracy and lower equipment‑operation costs. Nevertheless, frequency converters generate high‑frequency harmonic interference during operation. Ordinary power cables cannot effectively suppress such electromagnetic disturbance, which may lead to unstable motor operation, signal distortion, premature insulation ageing and faults of surrounding sensitive electronic equipment. Our shielded variable‑frequency cables solve these typical problems through a professional‑grade shielding structure, creating a reliable power‑supply channel between frequency‑conversion control units and driven motors.

These cables are particularly well‑suited for papermaking, metallurgy, metal processing, mining, railway transportation, food‑processing and other industrial sectors. In papermaking plants, variable‑frequency cables deliver stable power for speed‑regulated driving motors of paper‑making machines, conveyor rollers and pulping‑process equipment, ensuring uniform running speed and consistent finished‑paper quality. Within metallurgical workshops, they serve high‑temperature production lines and rolling‑mill drive motors, resisting thermal radiation and mechanical vibration. Metal‑processing workshops rely on these cables for lathes, cutting machines and automated processing equipment whose rotating speed needs frequent adjustment. In mining sites, variable‑frequency drive systems control belt conveyors, hoisting machinery and underground ventilation equipment, requiring cables with strong anti‑interference capability and high mechanical reliability. Railway‑related projects use this cable series for traction‑auxiliary equipment, speed‑regulating systems and workshop production lines. Food‑processing factories deploy variable‑frequency cables on mixer, conveyor, refrigeration and packaging equipment, supporting stable and hygienic industrial‑production operation.

Operating Conditions: 

1. Rated voltage U0/U: 0.6/1 kV

2. The maximum permissible long‑term operating temperature of cable conductor is 90 °C; under short‑circuit conditions, the peak conductor temperature shall not exceed 250 °C

3. Ambient temperature during cable laying shall not be lower than 0 °C; for fixed‑installation laying, the minimum ambient temperature shall be ‑10 °C

4. The minimum allowable bending radius of the cable shall be no less than 15D (D stands for the outer diameter of cable, in mm)

The above‑mentioned operating‑condition specifications are formulated according to the electrical properties of cross‑linked polyethylene insulation, shielding‑layer material characteristics and practical‑site construction experience. The 0.6/1 kV rated‑voltage design covers most low‑voltage variable‑frequency drive‑system demands in industrial workshops. The long‑term conductor temperature limit of 90 °C reflects the excellent thermal‑resistance performance of XLPE insulation. When short‑circuit faults occur in the circuit, huge instantaneous current generates sharp heat accumulation; the upper‑limit temperature of 250 °C defines the safety threshold within which the cable can withstand short‑term thermal shock without permanent insulation damage. As for laying‑temperature requirements, installation below 0 °C may reduce the flexibility of insulation and shielding materials. Bending and pulling operations under excessively cold conditions may produce invisible micro‑cracks. Fixed‑laid cables are allowed for construction at ‑10 °C because once installed and fixed in place, they no longer suffer repeated bending stress. The strict minimum‑bending‑radius requirement of 15 times the cable outer diameter protects the copper‑wire braided shield layer from fracture, deformation and performance degradation, maintaining the integrity of electromagnetic‑shielding function throughout installation and long‑term operation.

Service Characteristics: 

1. Models BPYJVP12R‑TK and ZR‑BPYJVP12R‑TK adopt Class‑5 flexible stranded copper conductors complying with GB/T 3956‑2008. Fine‑wire flexible‑stranded design greatly improves cable flexibility, making installation easier inside equipment cabinets, cable trenches and narrow‑space wiring routes. Flexible conductors also endure repeated vibration and slight displacement of variable‑frequency motor terminals, lowering the risk of conductor fatigue fracture.

2. Cross‑linked polyethylene (XLPE) insulation provides outstanding temperature resistance and weather‑proof performance. After cross‑linking treatment, polyethylene material is transformed from thermoplastic into thermosetting polymer, which will not soften and flow under long‑time high‑temperature load. This property effectively slows down insulation ageing and extends cable service life.

3. Low transfer impedance brings excellent electromagnetic‑compatibility performance. The copper‑wire braided shielding layer forms a uniform conductive protective barrier. Low transfer‑impedance design can efficiently restrain high‑frequency harmonic noise generated by frequency converters, preventing interference signals from leaking outwards to disturb nearby sensors, control‑signal cables and precision instruments.

4. Low operating‑capacitance characteristic reduces reactive‑power loss produced by high‑frequency signals. In variable‑frequency circuits, high‑frequency components will generate capacitive‑coupling loss between conductors. Our low‑capacitance design cuts down such energy consumption, reduces leakage current and improves the overall energy‑saving effect of the variable‑frequency drive system.

5. Excellent anti‑interference and low‑emission performance realizes two‑way electromagnetic protection. On the one hand, the shielding layer prevents external electromagnetic‑field noise from intruding into the power circuit and affecting the normal operation of variable‑frequency motors. On the other hand, it suppresses electromagnetic radiation generated inside the cable, avoiding signal pollution to surrounding equipment. This two‑way shielding function is extremely critical for industrial sites densely covered with automation‑control lines.

6. Symmetrical three‑core structural design delivers better transmission performance compared with four‑core cables. Balanced‑symmetrical conductor layout optimizes current distribution inside the cable, reduces unbalanced impedance loss, weakens circulating‑current loss and improves the stability of power supply for variable‑frequency loads. This optimized‑structure solution is specially tailored for variable‑frequency motor‑power‑supply scenarios.

Wide‑Ranging Industrial Applications and National‑Key‑Project Deployment

Benefiting from reliable electrical‑transmission capacity, powerful electromagnetic‑shielding performance and stable adaptability to complex industrial environments, our variable‑frequency power‑cable products are extensively applied in metallurgy, electric power, energy, chemical industry, construction, shipbuilding, transportation and many other sectors, and have been adopted for numerous national key engineering projects. In metallurgical‑production bases, these cables provide variable‑frequency power supply for smelting‑auxiliary equipment and rolling‑drive motors. Within power‑industry facilities, they are used for fan, water‑pump and air‑conditioner variable‑frequency energy‑saving renovation projects inside power plants and substations. New‑energy‑energy‑development sites deploy variable‑frequency cables for wind‑turbine pitch‑control drive systems and photovoltaic‑station auxiliary‑equipment speed‑regulating circuits. Chemical industrial parks select this cable series for frequency‑conversion power loops of chemical‑reactor agitators and process‑flow delivery pumps.

For the construction sector, variable‑frequency cables are used for elevator‑drive systems, large‑ventilation‑fan speed‑regulation circuits and water‑supply‑pump energy‑saving control in high‑rise buildings and industrial plants. Ship‑building yards adopt our variable‑frequency cables for workshop hoisting‑equipment and marine‑auxiliary machinery drive systems. Highway, railway and urban‑rail transit‑transportation projects install these cables in tunnel‑ventilation variable‑frequency control loops and station‑building electromechanical equipment. Besides general industrial usage, our variable‑frequency cables have participated in many national‑level key infrastructure‑construction programs, delivering high‑reliability power‑transmission support for large‑scale industrial upgrading, energy‑conservation‑emission‑reduction reconstruction and intelligent‑manufacturing‑base construction.

Enterprise Strength and Nation‑Wide Service Network

Supported by advanced automated‑production workshops, professional‑shielding‑performance testing laboratories and a complete quality‑management system, our full‑range cable products maintain stable and trustworthy quality, enjoying great popularity all over China. We have built long‑term‑cooperative relationships with industrial‑equipment manufacturers, engineering‑construction contractors, automation‑system integrators and power‑grid‑related‑enterprises across provinces. To deliver fast, targeted and full‑lifecycle customer services, our company has established a mature localized‑service network. Permanent service offices have been set up in Tangshan, Shanghai, Xi’an, Shandong, Xinjiang and other core‑industrial regions. Our regional‑service teams provide pre‑sales technical consultation, variable‑frequency‑cable‑model‑selection guidance, on‑site construction‑specification training, laying‑quality inspection and comprehensive after‑sales maintenance support. Whenever customers encounter problems concerning bending‑radius control, shielding‑layer grounding requirements or installation techniques, local engineers can respond rapidly and offer practical solutions. By combining high‑performance variable‑frequency cables with efficient regional services, our enterprise keeps supplying safe, interference‑free and durable power‑transmission solutions for industrial‑automation customers and national‑key‑project developers nationwide.