2YSLCYK-JB 0.6/1 kV Symmetrical VFD Cable

2YSLCYK-JB cable with a symmetrical 3+3 layout

2YSLCYK-JB is a 0.6/1 kV screened motor power cable for frequency-converter-fed three-phase drives. This page covers the black PVC, 3+3 construction: three phase conductors and three smaller protective-earth conductors distributed symmetrically around them. That layout gives the buyer a defined alternative to a conventional four-core motor cable when the equipment design calls for a split protective-earth arrangement.

The symmetrical assembly and overall foil-plus-braid screen support control of common-mode interference in the drive connection. PE insulation provides a low-capacitance design, which is relevant when assessing the electrical loading of longer motor leads. Actual performance depends on the converter, motor, cable length and termination system, so the cable must be selected as part of the complete drive installation.

• Specify the complete configuration: record the phase cross-section and each of the three earth-core cross-sections.
• Check the earthing concept: the selected design considers the protective conductors together with the screening braid.
• Plan for the route: use the size data and installation limits to review glands, bending space and permitted movement.
• Compare like-for-like replacements: match the core layout and sheath construction as well as the model marking.

Model suffix conventions vary between cable families; the 3+3 arrangement specified here is the ordering reference. Browse the industrial cable range for other motor-power and control constructions.

Construction

Three large phase cores and three smaller PE cores form the symmetrical 2YSLCYK-JB assembly. Both EMC screens surround the complete core group.

Protective-earth and screen design

The specified earth-core sections and the copper braid form part of the selected earthing concept. Check the complete protective circuit and fault duty when comparing a substitute. The three smaller PE cores must not be treated as three full-size phase conductors, and the braid is an EMC screen rather than a steel armour layer.

Applications

The symmetrical 3+3 construction serves VFD-to-motor power connections where the drive design specifies distributed protective-earth conductors and overall screening.

• Motor connections in paper-processing machinery.
• Chemical-process plant and heavy industrial drive systems.
• Fixed routes in dry, damp or wet areas, including outdoor routes using the black-sheath design.
• Occasional non-automated movement within the specified radius and temperature limits.

Drive-system selection

Confirm motor-lead length and the converter manufacturer's limits before choosing the cross-section. The capacitance table helps compare the selected configuration; filters, bonding and motor-bearing protection remain system-design decisions.

Use broad circumferential screen termination according to the drive and motor instructions. Review the braided cable shielding guide when planning the screen connection. This construction is intended for occasional free movement without compulsory guidance; continuous drag-chain cycling or torsion requires a cable documented for that duty.

Choosing between related motor cables

This page specifies the black-sheath 3+3 arrangement. The related 2YSLCYK-J uses four equal-size cores and one PE core, while 2XSLCYK-J uses XLPE insulation. The transparent-sheath 2YSLCY-JB range is a separate construction. Retain the full configuration on the order rather than relying on suffixes alone.

Specifications

Symmetrical 3+3 size data

Nominal reference-design dimensions and approximate weights are shown below. Confirm finished values for the selected order. Each G value is the cross-section of one of the three green/yellow PE cores, not their combined area.

Current figures are reference ratings at 30 °C. Verify permissible current against the installation method, grouping, ambient conditions and drive duty. Copper index is a commercial reference quantity and is separate from the finished cable weight.

Electrical characteristics by configuration

Capacitance and inductance are stated at 800 Hz. Transfer impedance is stated at 30 MHz. These reference values support comparison of the selected cable size; they do not define a universal maximum motor-lead length.

Standards

These references describe the conductor, insulation, sheath and test basis of the specified 3+3 design.

The official IEC 60228 conductor standard explains conductor classification and resistance requirements. Specify the required inspection records with the final phase-and-earth configuration.