Rubber Wires And Cables Improve The Reliability Of The System
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The cables used in the low-voltage DC transmission part of the photovoltaic power generation system have different requirements for the connection of different parts due to the different use environment and technical requirements. The factors considered are: insulation performance, heat resistance, flame retardant performance, aging performance, wire diameter specifications, etc. The specific requirements are as follows:
1. The connecting cable between the solar cell module and the module is generally connected with the connecting cable connected to the module junction box. When the length is not enough, a special extension cable can be used. According to the different component power, this connection cable has three specifications: cross-sectional area 2.5m㎡, 4.0m㎡, 6.0m㎡. This kind of connecting rubber wire and cable adopts double-layer insulation sheath, which has superior anti-ultraviolet, waterproof, ozone, acid and salt corrosion resistance, superior all-weather performance and abrasion resistance.
2. For the connecting cable between the battery and the inverter, it is required to use a multi-strand flexible wire that has passed the UL test and connect it as close as possible. Choosing short and thick cables can reduce loss, improve efficiency, and improve system reliability.
3. The connection rubber wires and cables between the battery array and the controller or DC junction box also need to use UL tested multi-strand flexible wires, and the cross-sectional area specification depends on the maximum output current of the array.
The cross-sectional area of each part of the rubber wire and cable should be determined according to the following principles: Generally, the rated current of the connecting cable between the solar cell module and the module, between the battery and the battery, and between the AC load is the maximum continuous working current of each cable. 1.25 times; the rated current of the connecting cable between the solar cell array and the array, between the battery (group) and the inverter is generally 1.5 times the maximum continuous working current of each cable.