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LSZH LiHCH Screened Control Cable Flexible Steel Wire Braid Armoured Cable-CU/XLPE/CWBS/PVC Cable
LSZH LiHCH Screened Control Cable Flexible Steel Wire Braid Armoured Cable-CU/XLPE/CWBS/PVC Cable

LSZH LiHCH Screened Control Cable Flexible Steel Wire Braid Armoured Cable-CU/XLPE/CWBS/PVC Cable

The cables are also commonly referred to as LSZH cables or halogen free cables. They often have flame retardant properties, making them flame retardant low smoke (FR-LS) cables.

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Application Construction Characteristics Parameter Related Products

APPLICATION

 

Unlike PVC Cable and those made of other compounds which produce vast amounts of dense black smoke, toxic fumes and acid gas when exposed to fire, LSZH cables produce very low levels of smoke and toxic fume and no acid gases. They are essentially halogen free cables. They are therefore often specified indoors, especially in public areas, and in other hazardous environments and poorly ventilated areas. This includes cars, aircraft, railway carriages and ships. LSZH sheathed cables are commonly used across tunnels and underground rail networks.

CONSTRUCTION

 

 

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• Conductor: Copper, class 1, 2, solid, stranded round conductor
• Insulation: Cross-linked polyethylene XLPE
• Filler: Non-hygroscopic material
• Binder: Non-hygroscopic material
• Inner sheath:Low SmokeZero Halogen LSZH
• Armour: Galvanized steel tape or steel wire
• Outer sheath: Low Smoke Zero Halogen LSZH

• Rated Voltage:300/500V, 450/750V, 0.6/1kV

CHARACTERISTICS

 

Characteristics of Low Smoke Zero Halogen (LSZH) Control Cables

1. Basic Definition & Common Models

Typical models: WDZ-KYJY, WDZ-KYJVP, WDZ-KYJVP2, WDZ-KYJY22, WDZ-KYJY32
Conductor: Copper core
Insulation & sheath: Low smoke zero halogen polyolefin compound (no chlorine, bromine or other halogen elements)
Core positioning: Environment-friendly fire-safety control cable for densely populated public buildings

2. Main Advantages

(1) Zero halogen, non-toxic & non-corrosive combustion fumes

No halogen substances in raw materials. When burning, it will not release toxic hydrogen chloride, bromide and corrosive acid gas, unlike PVC cables.
  • Avoids poisoning and respiratory injury to evacuation personnel during fire;
  • Prevents corrosion damage to precision equipment, circuit boards, monitoring instruments and emergency power systems.

(2) Ultra-low smoke density for clear evacuation visibility

Generates far less white thin smoke during combustion compared with PVC. High light transmittance of smoke ensures clear escape routes, reduces stampede risks in fire accidents, and meets strict smoke density standards for subway, hospital and tunnel projects.

(3) Excellent thermal performance of XLPE/PO insulation

  1. Long-term allowable operating temperature: 90°C; short-circuit withstand temperature up to 250°C, higher ampacity than PVC insulated control cables of the same cross-section.
  2. Outstanding thermal aging resistance, stable insulation performance in high-temperature power distribution rooms and densely laid cable tunnels.

(4) Superior wide-range environmental adaptability

  1. Good weather & UV resistance: Resists sunlight aging, pulverization and cracking, suitable for outdoor exposed cable tray laying.
  2. Excellent low-temperature toughness: Remains flexible at -40°C without hardening or cracking, applicable to cold northern open-air and underground projects.
  3. Strong resistance to moisture, dilute acid, alkali and mineral oil, stable operation in damp pipe galleries and light chemical workshops.

(5) Optional flame retardant & fire-resistant grades

  • WDZ: Low smoke zero halogen flame retardant, slows flame spread to avoid fire chain reaction;
  • WDZN: Low smoke zero halogen fire-resistant, maintains normal circuit transmission under specified fire temperature for 90/180 minutes, critical for emergency lighting, fire alarm, smoke exhaust and elevator control circuits.

(6) Complete structural series for diverse laying demands

  • Unarmored type (WDZ-KYJY): Indoor cable trays, control rooms;
  • Copper braided shield (WDZ-KYJVP): Suppress low-frequency magnetic interference near transformers;
  • Copper tape shield (WDZ-KYJVP2): Excellent anti-high-frequency interference for inverter automation lines;
  • Steel tape armored (WDZ-KYJY22): Anti-extrusion, anti-rodent, for horizontal direct burial;
  • Steel wire armored (WDZ-KYJY32): High tensile resistance, for vertical shafts and suspended overhead laying.

(7) Long service life

Low smoke zero halogen polyolefin material resists oxidation and chemical erosion far better than PVC, extending the cable’s service life by 10–15 years in underground or outdoor environments.

3. Disadvantages

(1) Higher raw material & production cost

Special modified polyolefin materials and complex extrusion processes raise costs significantly. LSZH control cables cost 40%~70% more than equivalent PVC KVV series cables, increasing overall project investment.

(2) Harder texture, larger minimum bending radius

LSZH insulation and sheath have higher hardness than soft PVC. It requires a larger bending radius during installation, not suitable for ultra-narrow cabinet wiring with frequent sharp bending.

(3) Inferior oil resistance compared to PVC

Long-term immersion in high-concentration hydraulic oil or engine oil will cause slight swelling of LSZH sheath. For heavy oil-polluted workshops, oil-resistant customized LSZH or rubber-sheathed cables are required.

(4) Poor self-extinguishing performance without flame retardant modification

Ordinary non-flame-retardant low smoke zero halogen cables will continue burning when exposed to open fire. Flame retardant grade (WDZ) must be selected for public building fire protection systems.

4. Applicable Scenarios

  • Densely populated public areas: Subways, hospitals, schools, shopping malls, high-rise residential & office buildings;
  • Traffic infrastructure: Road tunnels, railway tunnels, underground comprehensive pipe galleries, airport terminals;
  • Precision equipment rooms: Data centers, computer rooms, intelligent monitoring centers;
  • Fire emergency circuits: Fire alarm linkage, emergency lighting, fire elevator, smoke exhaust fan control loops;
  • Underground enclosed spaces with high evacuation safety requirements.

5. Unsuitable Scenarios

  • Low-budget ordinary factory indoor cabinet control without fire & environmental protection requirements;
  • Equipment wiring requiring repeated frequent flexible bending movement;
  • Workshop areas with long-term heavy oil immersion without customized oil-resistant sheath.

STANDARD

 

 

IEC 60227

IEC 60502-1

IEC 60332

EN 50525

EN 50288

EN 50575

BS 5308

VDE 0281

CSA C22.2

AS/NZS 5000.3

NUMBER OF CORE AND CROSS SECTION OVERALL DIAMETER COPPER WEIGHT APPROX. CABLE WEIGHT STANDARD LENGTH
(mm2) (mm) (kg/km) (kg/km) (mt)
2 x 0,22 4,20 11 26 100/500/1000
3 x 0,22 4,30 13 29 100/500/1000
4 x 0,22 4,70 15 39 100/500/1000
5 x 0,22 5,00 17 44 100/500/1000
6 x 0,22 5,30 22 50 100/500/1000
8 x 0,22 5,60 25 61 100/500/1000
10 x 0,22 6,70 30 79 100/500/1000
12 x 0,22 7,10 35 90 100/500/1000
14 x 0,22 7,40 40 100 100/500/1000
16 x 0,22 7,70 45 104 100/500/1000
18 x 0,22 8,00 50 110 100/500/1000
20 x 0,22 8,30 52 121 100/500/1000
NUMBER OF CORE AND CROSS SECTION OVERALL DIAMETER COPPER WEIGHT APPROX. CABLE WEIGHT STANDARD LENGTH
(mm2) (mm) (kg/km) (kg/km) (mt)
3 x 0,34 4,80 20 36 100/500/1000
4 x 0,34 5,20 25 46 100/500/1000
5 x 0,34 5,60 31 56 100/500/1000
6 x 0,34 5,90 34 63 100/500/1000
8 x 0,34 6,20 38 76 100/500/1000
12 x 0,34 7,90 51 109 100/500/1000
14 x 0,34 8,20 60 120 100/500/1000
16 x 0,34 8,70 68 132 100/500/1000
18 x 0,34 9,20 75 144 100/500/1000
20 x 0,34 9,60 84 161 100/500/1000
NUMBER OF CORE AND CROSS SECTION OVERALL DIAMETER COPPER WEIGHT APPROX. CABLE WEIGHT STANDARD LENGTH
(mm2) (mm) (kg/km) (kg/km) (mt)
3 x 0,50 5,60 21 54 100/500/1000
4 x 0,50 6,20 27 67 100/500/1000
5 x 0,50 6,90 31 78 100/500/1000
6 x 0,50 7,40 36 90 100/500/1000
7 x 0,50 7,40 42 98 100/500/1000
8 x 0,50 7,70 45 104 100/500/1000
10 x 0,50 9,60 56 135 100/500/1000
12 x 0,50 9,70 68 150 100/500/1000
14 x 0,50 10,10 75 164 100/500/1000
16 x 0,50 10,70 83 185 100/500/1000
18 x 0,50 11,20 95 203 100/500/1000
20 x 0,50 11,60 102 217 100/500/1000
NUMBER OF CORE AND CROSS SECTION OVERALL DIAMETER COPPER WEIGHT APPROX. CABLE WEIGHT STANDARD LENGTH
(mm2) (mm) (kg/km) (kg/km) (mt)
3 x 0,75 6,10 30 67 100/500/1000
4 x 0,75 6,70 35 81 100/500/1000
5 x 0,75 7,40 43 99 100/500/1000
6 x 0,75 8,00 51 109 100/500/1000
7 x 0,75 8,00 56 115 100/500/1000
8 x 0,75 8,40 64 128 100/500/1000
10 x 0,75 10,20 80 162 100/500/1000
12 x 0,75 10,50 94 184 100/500/1000
14 x 0,75 11,00 107 206 100/500/1000
16 x 0,75 11,60 120 230 100/500/1000
18 x 0,75 12,60 143 267 100/500/1000
20 x 0,75 13,00 155 285 100/500/1000
NUMBER OF CORE AND CROSS SECTION OVERALL DIAMETER COPPER WEIGHT APPROX. CABLE WEIGHT STANDARD LENGTH
(mm2) (mm) (kg/km) (kg/km) (mt)
3 x 1 6,70 37 80 100/500/1000
4 x 1 7,20 46 95 100/500/1000
5 x 1 7,90 56 114 100/500/1000
6 x 1 8,50 66 131 100/500/1000
7 x 1 8,50 74 140 100/500/1000
8 x 1 9,20 83 160 100/500/1000
10 x 1 10,90 104 195 100/500/1000
12 x 1 11,30 121 222 100/500/1000
14 x 1 12,20 139 262 100/500/1000
16 x 1 12,40 156 291 100/500/1000
18 x 1 13,60 175 326 100/500/1000
20 x 1 14,00 195 350 100/500/1000
NUMBER OF CORE AND CROSS SECTION OVERALL DIAMETER COPPER WEIGHT APPROX. CABLE WEIGHT STANDARD LENGTH
(mm2) (mm) (kg/km) (kg/km) (mt)
3 x 1,5 7,10 48 93 100/500/1000
4 x 1,5 7,70 61 111 100/500/1000
5 x 1,5 8,50 75 136 100/500/1000
6 x 1,5 8,70 88 158 100/500/1000
7 x 1,5 8,70 100 170 100/500/1000
8 x 1,5 9,80 113 194 100/500/1000
10 x 1,5 12,20 151 248 100/500/1000
12 x 1,5 12,50 166 283 100/500/1000
14 x 1,5 13,10 191 321 100/500/1000
16 x 1,5 13,90 216 363 100/500/1000
18 x 1,5 14,50 245 402 100/500/1000
20 x 1,5 15,50 268 437 100/500/1000

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Huili Cable Co., Ltd. (formerly Luohe Huili Cable Co., Ltd. and Luohe Cable Factory) was founded in 1989 and was renamed Huili Cable Co., Ltd. on September 14, 2024. The company's registered capital is RMB 200 million.

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