PAS BS 5308 Part 1 Type 2 SIL/OS/LSZH/SWA/LSZH (Fire Resistant) Cable
APPLICATION
Publicly Available Standard (PAS) BS 5308 cables are designed to
carry communication and control signals in a variety of installation
types including those found in the petrochemical industry. The
signals can be of analogue, data or voice types and from a variety
of transducers such as pressure, proximity or microphone. Part 1
Type 2 cables are designed where a greater degree of mechanical
protection is required or where there is direct burial at a suitable
depth. Suitable for fire resistant installations.
CHARACTERISTICS
Rated Voltage :Uo/U: 300/500V
Rated Temperature:
Fixed: -40ºC to +80ºC
Flexed: 0ºC to +50ºC
Minimum Bending Radius: 12D
CONSTRUCTION
Conductor
0.5mm² - 0.75mm²: Class 5 flexible copper conductor
1mm² and above: Class 2 stranded copper conductor
Insulation: Silicone rubber ceramic type
I. Overview
BS 5308 Part 1 Type 2 SIL/OS/LSZH/SWA/LSZH (Fire Resistant) Cable is a high - performance cable designed for multiple - aspect requirements. It plays a vital role in construction, industry, and transportation.
II. Structural Composition
(I) Silicone (SIL) Insulation Layer
Good Insulation
SIL offers high - quality insulation. Its stable molecular structure prevents current leakage, ensuring efficient power transfer at various voltages for equipment operation.
Temperature and Weather Resistance
It can withstand a wide temperature range and has good weatherability, suitable for different environments.
(II) Outer Separation Layer (OS)
External Protection
OS protects the cable's interior from external substances like moisture and chemicals, maintaining its electrical and mechanical properties.
Stress Management
It buffers and distributes stress when the cable is under pressure, preventing internal damage.
(III) Low - Smoke Zero - Halogen (LSZH) Sheath Layer
Fire - resistant and Green
In a fire, LSZH emits little smoke and no toxic gases, aiding evacuation and being eco - friendly.
Mechanical Protection
It provides some mechanical protection against common damages.
(IV) Steel Wire Armour (SWA)
Mechanical Strength
SWA offers strong mechanical protection against external forces like soil pressure or equipment collisions.
Electromagnetic Shielding
It shields against electromagnetic interference, enhancing signal transmission quality.
III. Performance Characteristics
(I) Fire - resistant Performance
Fire - resistance
The cable can maintain circuit integrity in a fire due to its structure and LSZH layer, ensuring key equipment operation.
Flame Spread Control
It can limit flame spread, improving building safety.
(II) Electrical Performance
Efficient Transmission
SIL's properties allow for efficient power transmission, reducing loss during long - distance transfer.
Insulation Reliability
SIL and OS ensure stable insulation in complex electrical environments.
(III) Environmental Adaptability
Low - Smoke Zero - Halogen Advantage
In populated areas, its low - smoke zero - halogen feature protects lives and the environment during a fire.
Wide - range Tolerance
It can adapt to various environmental conditions without significant performance impact.
(IV) Mechanical Performance
Strength and Toughness
SWA and SIL give the cable strength and toughness to withstand external forces during laying.
Bending Performance
It can be bent without severely affecting internal performance.
IV. Application Fields
Construction Field
Used in high - safety - requirement circuits in buildings for fire - protection and safety.
Industrial Field
Transmits power and signals in industrial environments with complex conditions.
Transportation Field
Applied in transportation hubs to improve fire - safety and ensure facility operation.
V. Installation and Maintenance
(I) Installation Points
Laying Method Selection
Can be laid in various ways. Different methods need to consider relevant factors to avoid damage.
Bending Radius Control
The cable's bending radius must be controlled to avoid internal layer damage.
(II) Maintenance Precautions
Regular Visual Inspection
Regularly check the cable's appearance, especially LSZH and SWA. Repair damage timely.
Electrical Performance Detection
Regularly test electrical performance. If abnormal, find the fault cause and repair or replace as needed.