We know that cables come in both high-voltage and low-voltage varieties. Today, we'll focus on high-voltage cables. High-voltage cables are a type of power cable, used for transmitting power between 1 kV and 1000 kV, and are primarily used for power transmission and distribution. There are numerous types of high-voltage cables, and their nomenclature is quite complex, so let's take a look.
Common Cable Model Descriptions and Applications
1) Copper Core
NA-YJV, NB-YJV, XLPE insulated, PVC sheathed, Class A(B) fire-resistant power cables can be installed indoors, in tunnels, and in ducts where fire resistance is required.
NA-YJV22, NB-YJV22, XLPE insulated, steel-tape armored, PVC sheathed, Class A(B) fire-resistant power cables are suitable for underground installation where fire resistance is required, but are not suitable for installation in ducts.
NA-VV and NB-VV PVC insulated and sheathed Class A(B) fire-resistant power cables can be installed indoors, in tunnels, and in ducts where fire resistance is required.
NA-VV22 and NB-VV22 PVC insulated, steel-tape armored, and PVC-sheathed Class A(B) fire-resistant power cables are suitable for underground installation where fire resistance is required, but are not suitable for installation in ducts.
WDNA-YJY23 and WDNB-YJY23 XLPE insulated, steel-tape armored, and polyolefin-sheathed Class A(B) halogen-free, low-smoke fire-resistant power cables are suitable for underground installation where both halogen-free, low-smoke, and fire resistance are required, but are not suitable for installation in ducts.
2) Copper Core and Aluminum Core
ZA-YJV, ZA-YJLV, ZB-YJV, ZB-YJLV, ZC-YJV, ZC-YJLV, and Class A (B, C) flame-retardant power cables with cross-linked polyethylene insulation and PVC sheath can be installed indoors, in tunnels, and in ducts where flame retardancy is required.
ZA-YJV22, ZA-YJLV22, ZB-YJV22, ZB-YJLV22, ZC-YJV22, and ZC-YJLV22, Class A (B, C) flame-retardant power cables with cross-linked polyethylene insulation and steel tape armor and PVC sheath, are suitable for underground installation where flame retardancy is required but are not suitable for installation in ducts.
ZA-VV, ZA-VLV, ZB-VV, ZB-VLV, ZC-VV, ZC-VLV, and PVC insulated, PVC sheathed, Class A (B, C) flame-retardant power cables can be installed indoors, in tunnels, and in ducts where flame retardancy is required.
ZA-VV22, ZA-VLV22, ZB-VV22, ZB-VLV22, ZC-VV22, and ZC-VLV22, PVC insulated, steel-tape armored, and PVC sheathed, Class A (B, C) flame-retardant power cables are suitable for underground installation where flame retardancy is required, but are not suitable for installation in ducts.
WDZA-YJY, WDZA-YJLY, WDZB-YJY, WDZB-YJLY, WDZC-YJY, WDZC-YJLY, and Class A (B, C) flame-retardant power cables with cross-linked polyethylene insulation and polyolefin sheath can be installed indoors, in tunnels, and in ducts where flame retardancy, halogen-free, and low-smoke properties are required.
WDZA-YJY23, WDZA-YJLY23, WDZB-YJY23, WDZB-YJLY23, WDZC-YJY23, and WDZC-YJLY23
Cross-linked polyethylene insulated, steel-tape armored, and polyolefin sheathed Class A (B, C) flame-retardant power cables are suitable for underground installation where flame retardancy, halogen-free, and low-smoke properties are required. They are not suitable for installation in ducts.
VV and VLV are copper (aluminum) core PVC insulated and sheathed power cables. They are installed indoors, in tunnels and ducts, or on outdoor racks. They are not subject to pressure or mechanical forces.
VY and VLY are copper (aluminum) core PVC insulated and polyethylene sheathed power cables.
VV22 and VLV22 are copper (aluminum) core PVC insulated, steel-tape armored, and polyethylene-sheathed power cables. They are installed indoors, in tunnels, cable trenches, and directly buried in the soil. They can withstand pressure and other external forces.
VV23 and VLV23 are copper (aluminum) core PVC insulated, steel-tape armored, and polyethylene-sheathed power cables.
Nomenclature Principles for High-Voltage Cable Models
The full nomenclature of wires and cables is often complex, so a simple name (usually a category name) combined with the model specification is sometimes used instead. For example, "low-voltage cable" refers to all plastic-insulated power cables rated at 0.6/1 kV. The spectrum of wires and cables is relatively complete. It can be said that as long as the standard model specifications of wires and cables are written, the specific product can be clearly identified. However, its complete naming has the following principles:
1. Content included in the product name
(1) Product application or size category name
(2) Product structure material or type;
(3) Important features or additional features of the product
Basically, the naming is carried out in the above order. Sometimes, in order to emphasize important or additional features, the features are written at the beginning or before the corresponding structural description.
2. Order of structural description
The product structure description is from the inside to the outside: conductor-->insulation-->inner sheath-->outer sheath-->armor type.
3. Simplification
Under the condition that it will not cause confusion, some structural descriptions are omitted or abbreviated. For example, aluminum conductors are not allowed in automotive wires and soft wires, so the conductor material is not described.
Example:
Rated voltage 8.7/15kV flame-retardant copper core, XLPE insulation, steel tape armor, PVC sheathed power cable
"Rated voltage 8.7/15kV" - Application/voltage level
"Flame retardant" - Feature emphasized
"Copper core" - Conductor material
"XLPE insulation" - Insulation material
"Steel tape armor" - Armor material and type (double steel tape intermittently wrapped)
"PVC sheath" - Inner and outer sheath materials (inner and outer sheath materials are the same, omitting the inner sheath material)
"Power cable" - Product category
In real life, high-voltage cables are certainly not used. However, in our daily lives, we constantly enjoy the convenience they bring us. Cables and wires are used in not only industrial development but also in communications and other fields. They are important products that promote development, so it is useful to gain some knowledge about them.
