The XLPE insulated control cable is suitable for signal transmission, control and measurement systems of electrical instrumentation and distribution equipment with rated voltages of 450/750V and below in industrial and mining enterprises such as metallurgy, electric power and petrochemical industry. The XLPE insulated flame-retardant control cable has the function of preventing the fire from spreading in the cable circuit and avoiding the expansion of fire accidents to reduce losses. The cross-linked PVC insulated flame-retardant control cable is characterized by the cable that can keep the cable line running normally within a certain period of time under the condition of burning, in order to facilitate evacuation of the crowd and rescue of important facilities. XLPE insulated halogen-free low-smoke control cable is suitable for electrical instruments with AC rated voltage of 450/750V and below in industrial and mining enterprises such as metallurgy, electric power, petrochemical industry. The signal transmission, control and measurement system of power distribution equipment has flame retardant. , low smoke and other properties.
Product performance standards
GB/T19666-2005 General rules for fire-retardant and fire-resistant wires and cables
GB/T9330.3-2008 rated voltage 450/750V and XLPE insulated control cable
1. Rated voltage
The rated voltage U0/U of the cable is expressed as follows:
Where: U0: the effective value of the voltage between any main insulated conductor and "ground" (metal shield, metal sleeve
or surrounding medium).
U: Voltage rms value between any two-phase conductor of a multi-core cable (wire) or single-core cable (wire) system.
2. Conductor rated working temperature
The maximum rated operating temperature of the cable conductor is 70 ° C short circuit (maximum duration does not exceed 5 s) the maximum
temperature of the cable conductor does not exceed 150 ° C
3. Laying the ambient temperature
The ambient temperature during wire laying should not be lower than 0 °C, otherwise it needs to be preheated beforehand.
4. Install the bending radius
a) The cable without armor layer shall be not less than 6 times the outer diameter of the cable;
b) Cables with armor or copper tape shielding structure shall be not less than 12 times the outer diameter of the cable;
c) The flexible cable with shield structure shall be not less than 6 times the outer diameter of the cable.
5. Cable transportation and storage requirements
The cable reels are not allowed to lay flat. It is strictly forbidden to drop the cable tray with cables from the height during transportation. It is strictly forbidden to damage the cable mechanically. If the cable needs to be used in sections, the cable head must be sealed with a waterproof cap after the
cable is segmented to prevent water ingress.
The conductor shall comply with the provisions of GB/T3956. The surface of the conductor shall be smooth and free of oil, without burrs, sharp edges and single lines protruding or broken.
The insulation should be tightly packed onto the conductor and should be easily peeled off without damaging the insulator, conductor or plating.
3. Metal shielding
Shielded cable should have copper tape shield or copper wire braided shield outside the cable core
4. Isolation sleeve
It is extruded on the core with polyvinyl chloride (PVC).
The metal core cable is made of galvanized steel or galvanized steel. The metal strip is wrapped by a double-layer gap, and the wire is twisted
by multiple concentrics.
6. Outer sheath
PVC insulated control cable, extruded on armor, metal shield or cable core with PVC sheathing material or polyethylene sheathing material.
7. Finished cable logo
The outer sheath surface of Chenpin cable is printed with a continuous mark of the name, model, rated voltage, number of cores,
nominal cross section and meter number.
Product model, specification
1 Product model
Common models of products are shown in Table 1
2. Product specifications
The rated voltage of the product, the nominal cross section of the conductor conductor and the number of cores are shown in Table 2.
Main technical performance of the product
1. The conductive core is divided into three types: the first one is a solid conductor (A), the second is a stranded conductor (B) is suitable for fixed
laying; the third is a stranded soft conductor (R), suitable for moving Required soft cable.
2. Conductor structure and DC resistance should meet the requirements of Table 3.
3. Insulation core identification can use color mark or digital mark, insulation resistance should meet the requirements of Table 7.
4. The insulated core should be subjected to the power frequency spark test, and the effective value of the test voltage is 6kv;
5 The cable can withstand AC 50HZ, 3000V, 5min withstand voltage test;