Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, and so on. They are all composed of single or multiple strands of wire and insulation, which are used to connect electrical circuits, electrical appliances, etc.
According to the system of photovoltaic power station, the cable can be divided into DC cable and AC cable, which are classified as follows according to the different uses and use environments:
1. DC cable
(1) Tandem cables between components.
(2) Parallel cables between strings and between strings and DC distribution boxes (combiner boxes).
(3) The cable between the DC distribution box and the inverter.
The above cables are all DC cables, which are laid outdoors and need to be moisture-proof, sun-proof, cold-resistant, heat-resistant, ultraviolet-resistant, and chemically resistant to acid and alkali in some special environments.
2. AC cable
(1) The connecting cable from the inverter to the step-up transformer.
(2) The connecting cable from the step-up transformer to the power distribution device.
(3) The connecting cable from the power distribution device to the power grid or the user.
This part of the cable is an AC load cable, which is laid in the indoor environment and can be selected according to the general power cable selection requirements.
