Selection criteria for chemical process instrument cables
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What specifications should be chosen for the signal wires, 24V power supply, 220V power supply, and buried galvanized pipe cables?
There are conduit pipes, so armor is not required; ordinary cables can be used, and it is best to lay them beneath the permafrost layer. It is recommended to use a power supply with 2*2.5mm2 or 3*2.5mm2 wires; a shielded version is preferable ； The recommended signal cable is ZR-(ia)-DJYVP 1*2*1.5mm2 (flame-retardant copper-core, polyethylene-insulated, PVC-sheathed, copper wire braided twisted-shielded cable).
Signal cable: DJYVP1*2*1.0; 220V power cable: KVV3*1.5 or ZR-KVV3*1.5
For digital signal wires: ZRC-KVVP – number of cable cores * 1.5; for analog signal wires: ZRC-DJYPVP – number of signal groups * number of cable cores * 1.0. For 24V power supply: ZRC-KVV-3 * 1.5; for 220V power supply: ZRC-KVV-3 * 1.5/2.5. An armored layer is required when burying the cables without galvanized pipes, while it is not necessary when using galvanized pipes