Definition of high voltage wires and cables
High-voltage cable is a type of power cable. The main types of medium and high voltage cables are: fire-resistant, flame-retardant, steel tape armored YJV, VV, YJLV, and VLV cables. It refers to the power cable used to transmit between 1kv and 1000kv, and is mostly used for power transmission and distribution.

Types of high-voltage cables
The main types of medium voltage cables are YJV cables, VV cables, YJLV cables, and VLV cables.
YJV cable full name: XLPE insulated, PVC sheathed power cable (copper core)
VV cable full name: PVC insulated poly, vinyl chloride sheathed power cable (copper core)
YJLV cable full name: XLPE insulated, PVC sheathed aluminum core power cable
Full name of VLV cable: PVC insulated, PVC sheathed aluminum core power cable
Due to the excellent electrical conductivity of copper conductors, more and more projects use copper core power cables as the main road of the power supply system. However, there are fewer applications of aluminum-core power cables, especially in the higher-voltage power system, the more copper-core cables are selected.

The structure of high-voltage cables
The components of a high-voltage cable from the inside to the outside include: conductor, insulation, inner sheath, filler (armor), and outer insulation. Of course, armored high-voltage cables are mainly used for underground burying, which can resist high-strength compression on the ground and prevent damage from other external forces.

Types and uses of high-voltage cables
NA-YJV, NB-YJV: XLPE insulated, PVC sheathed Class A (B) fire-resistant power cable. It can be installed indoors, tunnels and pipelines that require fire resistance.

NA-YJV22, NB-YJV22: XLPE insulated, steel tape armored, PVC sheathed Class A (B) fire-resistant power cable. It is suitable for laying in the ground when fire resistance is required, but not suitable for laying in pipelines.

NA-VV, NB-VV: PVC insulated, PVC sheathed Class A (B) fire-resistant power cable. It can be installed indoors, tunnels and pipelines that require fire resistance.

NA-VV22, NB-VV22: PVC insulated, steel tape armored, PVC sheathed Class A (B) fire-resistant power cable. It is suitable for laying in the ground when fire resistance is required, but not suitable for laying in pipelines.


WDNA-YJY23, WDNB-YJY23: XLPE insulated, steel tape armored, polyolefin sheathed A(B) halogen-free low-smoke fire-resistant power cable. It is suitable for laying in the ground when halogen-free, low-smoke and fire resistance are required, but not suitable for laying in pipelines.

ZA-YJV, ZA-YJLV, ZB-YJV, ZB-YJLV, ZC-YJV, ZC-YJLV: XLPE insulated, PVC sheathed A (B, C) flame-retardant power cable. It can be laid in indoors, tunnels and pipelines where flame retardancy is required.

ZA-YJV22, ZA-YJLV22, ZB-YJV22, ZB-YJLV22, ZC-YJV22, ZC-YJLV22: XLPE insulated, steel tape armored, PVC sheathed Class A (B, C) flame-retardant power cable. It is suitable for laying in the ground when flame retardant is required, but not suitable for laying in pipelines.

ZA-VV, ZA-VLV, ZB-VV, ZB-VLV, ZC-VV, ZC-VLV: PVC insulated and sheathed PVC sheathed Class A (B, C) flame-retardant power cables. It can be laid in indoors, tunnels and pipelines where flame retardancy is required.

ZA-VV22, ZA-VLV22, ZB-VV22, ZB-VLV22, ZC-VV22, ZC-VLV22: PVC insulated, steel tape armored, PVC sheathed Class A (B, C) flame-retardant power cables . It is suitable for laying in the ground when flame retardant is required, but not suitable for laying in pipelines.

WDZA-YJY, WDZA-YJLY, WDZB-YJY, WDZB-YJLY, WDZC-YJY, WDZC-YJLY: Cross-linked polyethylene insulated, polyolefin sheathed Class A (B, C) flame-retardant power cable. It can be installed in indoors, tunnels and pipelines that require flame retardant, halogen-free and low-smoke.
WDZA-YJY23, WDZA-YJLY23, WDZB-YJY23, WDZB-YJLY23, WDZC-YJY23, WDZC-YJLY23: XLPE insulated, steel tape armored, polyolefin sheathed Class A (B, C) flame-retardant power cable. It is suitable for laying in the ground when flame retardant, halogen-free and low-smoke are required, but not suitable for laying in pipelines.
VV, VLV: Copper (aluminum) core PVC insulated, PVC sheathed power cable. Laying indoors, tunnels and pipelines or outdoor bracket laying, not subject to pressure and mechanical external force
VY, VLY: Copper (aluminum) core PVC insulated and PE sheathed power cable
VV22, VLV22: Copper (aluminum) core PVC insulation, steel tape armor, and PVC sheath for electric power. Cables are laid indoors, tunnels, cable trenches and directly buried soil, the cables can withstand pressure and other external forces

VV23, VLV23: copper (aluminum) core PVC insulated, steel tape armored, polyethylene sheathed power cable

Use characteristics of high-voltage cables
This product is suitable for fixed laying lines for power transmission and distribution with AC rated voltage of 35KV and below. The maximum long-term working temperature of the cable conductor is 90 degrees, and the maximum temperature of the cable conductor does not exceed 250 degrees when short-circuited (the longest time does not exceed 5S).

UHV cable
1.8kV and below are low voltage cables; 3.6KV~35KV are medium voltage cables; 35KV~110KV are high voltage cables; 110~220KV is UHV cable;
UHV cable is a kind of power cable that has emerged with the continuous development of cable technology. UHV cables are generally used as the central hub in large-scale power transmission systems. They are a high-voltage cable with high technical content and are mainly used for long-distance power transmission.