Control cable MDZ

Control cable MDZ is a PVC insulated and PVC sheathed control cable suitable for use in industrial and mining enterprises, energy and transportation departments, and for controlling and protecting circuits with AC rated voltage below 450/750 volts.

Performance difference:

Control cables have characteristics such as resistance to damage and can be laid in tunnels or cable trenches. [1] Power cables are used in the backbone of the power system to transmit and distribute high-power electrical energy. Control cables directly transmit electrical energy from the distribution points of the power system to the power connection lines of various electrical equipment and appliances. The rated voltage of power cables is generally 0.6/1kV and above, while control cables are mainly 450/750V. When producing power cables and control cables of the same specifications, the insulation and sheath thickness of power cables is thicker than that of control cables.

（1） Control cables belong to electrical equipment cables, and power cables are two of the five major categories of cables.

（2） The standard for control cables is 9330, and the standard for power cables is GB12706.

（3） The color of the insulation core of control cables is generally black with white lettering, and low-voltage power cables are generally color coded.

（4） The cross-sectional area of control cables generally does not exceed 10 square meters, while power cables are mainly used for transmitting electricity and are generally large in cross-section.

Due to the reasons mentioned above, the specifications of power cables can generally be larger, up to 500 square meters (the range that conventional manufacturers can produce), and there are relatively few manufacturers that can produce even larger cross-sections. On the other hand, the cross-section of control cables is generally smaller, generally not exceeding 10 square meters.

In terms of the number of cable cores, power cables are generally 5 cores according to the requirements of the power grid, while control cables are used for transmitting control signals and have a larger number of cores. According to the standard, there are 61 cores, but they can also be produced according to user requirements.

Performance characteristics:

1. DC resistance: 20 ℃, 0.4mm copper wire, less than or equal to 148 Ω/km, 0.5mm copper wire, less than or equal to 95 Ω/km.

2. Insulation electrical strength: no breakdown between conductors at 1kV for 1 minute, and no breakdown between conductors and shields at 3kV for 1 minute

3. Insulation resistance: Each core wire is grounded with the remaining cores, and the control cable is greater than 10000M Ω· km, while the HYAT cable is greater than 3000M Ω· km.

4. Working capacitance: average value 52 ± 2nF/km

5. Remote Crosstalk Defense: The average power of the specified combination at 150kHz is greater than 69dB/km.