Product Usage

The PVC insulated control cable is suitable for electrical instrumentation, signal transmission, control and measurement systems of electrical distribution equipment with rated voltages of 450/750V and below in industrial and mining enterprises such as metallurgy, electric power and petrochemical industry. Used for monitoring circuits and protection circuits.

Product implementation standard   GB/T 9330.2-2008

Use characteristics

1. Rated voltage

The rated voltage of the cable is expressed as follows:

U0/U=450/750V

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. In the case of a short circuit (maximum duration not exceeding 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.

product structure

1. Conductor

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.

2. Insulation

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 cables shall be shielded by copper tape or wire braided outside the core.

4. Isolation sleeve

It is extruded on the cable core with polyvinyl chloride (PVC).

5. Armored

Multi-core cables are available in 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 the finished cable is printed with a continuous mark of the name, model, rated voltage, number of cores, nominal cross section and number of meters.

Product model, specification

1. Product model

The commonly used models of the products are shown in Table 1.

Main technical performance of the product

1. Conductive core is divided into three types, the first one is solid conductor (A), the second is stranded conductor (B) is suitable for fixed laying; the third is stranded soft conductor (R), suitable for moving Required soft cable.

2. Conductor structure and DC resistance should comply with 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;