Choosing the type of control cable requires consideration of multiple factors, including the number of cores, usage environment, mechanical strength requirements, fire resistance and flame retardant characteristics of the cable.
Core selection: For cables with less than 8 cores, 1.5mm cables are usually selected for external pipeline laying, mainly considering mechanical strength. Multi core cables can choose a specification of 1.0mm. When wiring inside the instrument cabinet, a 0.75mm cable can be selected. Considering the small signal current of the instrument, a 0.5mm cable is also acceptable, but the main consideration is mechanical strength.
Model selection: There are various types of control cables, including KVV, KVV22, KVVP, KVVP2, KVVP2-22, KVVR, KVVRP, etc. These models are distinguished based on different insulation materials, sheath materials, and whether shielding is required. In addition, according to the flame retardant and fire-resistant characteristics, the name of the control cable will be prefixed with ZC, ZR, NH, ZCN, etc. For example, the flame retardant C-grade KVV will be named ZC-KVV, the flame retardant KVV will be named ZR-KVV, and the fire-resistant KVV will be named NH-KVV or ZCN-KVV 2.
Special environmental considerations: For special environments or applications that require special protection, cable models with specific protective measures can be selected, such as armored models such as KVV22, KVVP22, etc. These models usually have higher fire resistance and can withstand direct flame combustion for a certain period of time without short circuits or faults.
Material selection: In addition to the common PVC insulated and sheathed cables mentioned above, there are also control cables that use special materials such as silicone rubber or fluoroplastic insulated and sheathed, such as KGGP2, KFGP, etc. These cables usually have better high temperature resistance and are suitable for high temperature environments
