Mineral insulated Fire resistance cable
YTTW cable is designed for aboveground applications.
Engineered to replace conduit and wire applications, this
all-in-one cable assembly offers fewer installation steps.
The copper metallic sheath protects the conductors from damage
before,during and after installation and provides overall
flexibility not available with a conduit.
Rated working voltage:
– Light Duty: 500 V
– Testing Voltage (50 Hz): 2500 V - 15 min
– Heavy Duty: 750 V
– Testing Voltage (50 Hz): 2000 V - 15 min
— Flame Retardant
— High Operating Temperatures
— LSOH Halogen-free
— Great Mechanical Strength
— Competitive Installed Cost
— Public Places |
Our YTTW cables provide outstanding electrical and fire-proof
properties, and are halogen free.
The design, construction and testing are compliant with
international standard IEC60502 and testing standard EN 50200
(PH-90),with standing temperatures of 840 °C for 90 minutes, which
means they are capable of remaining in working order despite the
most extreme fire conditions. Hence they are known as FIRE
RESISTANT cables.
This type of cable is made up of single and multi-cores 600/1000V
cables Service Temperature 90°C Emergency Overload Temperature
105°C Short-Circuit Temperature 250°C
Installation of these cables is essential in safety circuits
(detection and alarm circuits,evacuation and fire-fighting
systems).
|
STANDARDS: | National | International |
| Construction | GB/T 12706 | IEC 60502 |
| Non fire-propagating | GB/T 18380.3 | IEC 60332-3 |
| Low opacity of smoke emitted | GB/T 17651.2 | IEC 61034-2 |
| Fire-resistant | GB/T 12666.6 | IEC 60331 |
| Low acidity and corrosiveness of gases | GB/T 17650.2 | IEC 60754-2 |
| Halogen free | GB/T 17650.2 | IEC 60754-1 |
| Non flame-propagating | GB/T 18380.1 | IEC 60332-1-2 |
Cable structure | Conductor | Stranded copper conductor class 2 |
| Insulation | mica tape1, flame retardant |
| Filler | Glass yarns |
| core wraping | Core wrapping with glass-fibre tape as flame-protection |
| Sheath | Corrugated Copper |
| Outer covering (Optional) | Anticorrosion Outer Sheath PVC |
USAGE CHARACTERISTICS| Service Temperature | 90°C |
| Emergency Overload Temperature | 105°C |
| Short-Circuit Temperature | 250°C |
| Laying Temperature | should not be lower than 0°C |
| Minimum bending radius when laying | Single core: r = 6 x cable outer diameter |
| Sheath colour | The standard color is orange, other colors are available. |
3+1 CORENominal
cross
Section | Nominal insulation thickness | Thickness of metallic sheath | Outer Diameter approx. | Ampacity | Voltage drop
cos μ= 0,8 |
| mm2 | mm | mm | mm | A | V/A.km |
| 3×16+1×10 | 1.0 | 0.80 | 16.56 | 85 | 2.54 |
| 3×25+1×16 | 1.0 | 0.90 | 19.77 | 118 | 1.59 |
| 3×35+1×16 | 1.1 | 1.00 | 22.18 | 150 | 1.16 |
| 3×50+1×25 | 1.2 | 1.00 | 25.87 | 192 | 0.85 |
| 3×70+1×35 | 1.2 | 1.00 | 29.81 | 228 | 0.59 |
| 3×90+1×50 | 1.2 | 1.00 | 34.04 | 273 | 0.43 |
Notes:
Ampacities based on 90°C conductor temperature and 40°C ambient
temperature according to IEC 287 standard
The voltage drop based on conductor temperature 90°C is on the high
side calculated only for reference
When the cable adopt compressed cores, diameter of cable should be
95% of normal diameter, diameter of metallic sheath should be
adjusted correspondingly. When enhancing the insulation, outer
diameter of cable is increased for about 5%.
1 Glass cloth reinforced Muscovite mica tape
2 Current ratings in Ampere (A) up to 30° C ambient temperature
