The armored cables are cables surrounded by a metal braid. This braid is generally in red copper or tinned copper. Cables of this type are very resistant to external electromagnetic interference.
Structure
The armored cables are mainly composed of conductors, of insulation, shielding and outdoor sheath.
Driver : Part responsible for the transmission of electric current, generally made of metallic materials such as copper or aluminum.
Insulating : Surround the driver to isolate the electrical loads, providing support and protection. Materials insulator currents include PVC, the XLPEs, the EP, etc.
Screen : Reduces electromagnetic interference, generally composed of metal leaves, trellis or braids. The screen strengthens cable shielding capacity, effectively reducing the impact of electromagnetic interference on the cable signal.
Sheath : Located on the external surface of the cable, It protects the cable against mechanical damage and various threats.
Furthermore, Construction of high-voltage armored cables includes an internal semiconductor layer and an external semiconductor screen, which help to homogenize the electric field in the conductive soul and insulation and to improve the characteristics of electromagnetic compatibility (CEM) cable.
Principe
The principle of the armored cable is based on the use of a shielding layer that wraps the signal lines inside the cable. This shielding layer is made up of conductive materials such as metal leaves or braids. It forms an electromagnetic barrier, effectively preventing external electromagnetic fields from entering the cable or internal signals to escape.
When external electromagnetic waves cross The armored cable, The shielding layer acts like a wall, referring electromagnetic waves, preventing them from entering the cable. This effectively reduces interference suffered by internal cable signals.
The armored cable shielding layer forms an armor with the ground. So, When external electromagnetic interference disrupt the armored cable, Disturbing signals are concentrated on the shielding layer, then dissipated in the earth, thus preserving the integrity of internal cable signals.
The design of an armored cable also requires taking into account factors such as the choice of shielding materials, The shape of the shielding layer structure, and the grounding method of the shielding layer compared to the driver. A judicious choice of these factors can improve the efficiency of cable shielding, thus preventing disruptive signal leaks and internal signal leaks.
Classification
Depending on the different shielding methods and types of construction, armored cables can be divided into several types :
Steel band armored cable
The armored steel strip cable uses a steel strip and a copper sheet as a shielding layer, capable of effectively resisting electromagnetic interference (EMI), Adapted to petrochemical sectors, rail vehicles, and electrical engineering.
Armored cable with high density polyethylene insulation and corrugated copper sheath
This integrated shielding cable uses a wavy copper strip and polyethylene as insulation and sheath, Adapted to the transmission of indoor and outdoor signals.
Armored cable by copper sheet
The armored cable by copper sheet uses a copper strip and a copper sheet as a shielding layer, capable of effectively resisting electromagnetic interference (EMI) and radio frequencies (RFI), Suitable for robotics areas, industrial control and communications.
Armored cable by torsade copper wires
The armored cable by torsade of copper wires uses twisted copper wires and aluminum sheet as a shielding layer, Adapted to the transmission of low -power signals, in telecommunications, among others.
Aluminum armored cable
Aluminum armored cable uses aluminum sheet as a shielding layer, Suitable for safety areas, electric engineering, etc.
The armored cable has a wide variety of shielding methods and construction types. Thanks to the different shielding methods and the structural design, The armored cable can effectively protect external interference signals while transmitting electrical signals in order to improve the stability and reliability of the transmission. For different application scenarios, We can choose the appropriate armored cable according to its characteristics.
Advantage
Deletion of interference
When transmitting signals, external electromagnetic interference can affect signals. Armored cables using shielding technology can effectively delete such interference, thus improving the quality and reliability of the transmission of signals. In particular in the field of industrial control, Armored cables can effectively prevent electromagnetic interference affecting the transmission of sensors and actuator signals, thus improving the stability and precision of the entire control system.
Improvement of the quality of transmission of signals
Armored cables can effectively reduce the attenuation and distortion of signals during transmission, thus guaranteeing the quality of the transmission of signals. This is particularly important in audio and video transmission, where armored cables can ensure the clarity and stability of audio and video signals, improving the user experience.
Improved equipment reliability
In the field of industrial control and electronic equipment, the stability and accuracy of the signals are key indicators of the reliability of the equipment. The use of armored cables can effectively improve the reliability and stability of equipment, thus reducing equipment failures and maintenance costs.
Adaptability to complex environments
The armored cables have a good anti-interference capacity, which can operate in complex environments such as those with strong electromagnetic radiation, high temperatures and high pressures, thus meeting the needs of use in various special conditions.
Use characteristics
Armored cables should be used with nominal voltage de U0/U 3,6/6KV ;
The long -term operating temperature of the cable driver is 90 ° C ;
The minimum cable curvature radius is 6 times the diameter of the cable ;
Cables should not be exposed to sunlight for long periods ;
The lower soul of the cable must be well put to the earth.
Applications
The armored cables are suitable for the transmission of data and electricity in complex electromagnetic environments, such as the fields of computer science, communications, industrial control, medical equipment, Communication equipment, etc.
Communications field
Armored cables are widely used in the fields of communications, such as telephone lines, IT network cables, Data transmission cables, etc. These transmission lines require high stability and data transmission quality, that armored cables can provide by providing better protection and support, thus guaranteeing a higher quality of transmission.
Medical equipment
Medical equipment generally requires the connection of various sensors, Monitors and instruments. In medical applications, The reliability and accuracy of data transmission are crucial. Armored cables can provide stable and reliable data transmission, reducing interference and noise. In medical equipment, armored cables are used for the transmission and monitoring of signals.
Industrial control field
In the field of industrial control, armored cables are widely used in sensor control systems, actuators, computer vision and robots, among others.
Aerospace domain
In the aerospace field, Aircraft and satellites must often operate for long periods in changing environments, requiring stable data transmission. The armored cables offer high -quality data transmission protection, guaranteeing the reliability and stability of data transmission in various extreme environments.
In summary, armored cables play a role in reducing interference and noise, and are widely used in the fields of communications, medical, aerospace, etc. With the advancement of technology and social development, The use of armored cables will continue to become widespread. ZMS undertakes to produce high quality armored cables. Do not hesitate to contact us !