Tell me what specifications are used for your 4–20mA instrument cables
Thread Content
Could you tell me what specifications are used for the 4–20mA instrument cables? Has anyone used ZR-KVVPR cables for instruments, and how is that experience?
Here, we use ZR-KVVRP for all instrument signal cables; available in 2*1.5, 3*1.5, and 8*1.5 configurations, including those used in DCS and SIS systems. We have not used KVVPR before; the ‘K’ designation refers to the control cable series. If it is a shielded flexible cable, it should be similar to KVVRP. Some cable manufacturers use rather chaotic naming conventions for their products
The original poster’s question is equivalent to saying nothing; it cannot be answered! The selection of cables depends on many factors such as the transmission distance, explosion-proof environment, fire protection requirements, capacitive reactance and inductive reactance requirements, as well as the cable routing environment.
KVVPR has total shielding, while KVVRP has partial shielding; there is a difference
The KVVRP we purchased is fully shielded; I’m not familiar with KVVPR. I’ve seen computer cables that are double-shielded, but I’ve never used control cables with such shielding
Normally, RP1.5 square is sufficient
Things like DDZC-DJYP3VP3(B), YP, VP – it’s hard to tell them apart.
The regular DJYVP is 1*2*1.5mm2; for those with flame-retardant requirements, use ZR version, and for high-temperature resistance, there are special versions
Low smoke, low halogen; flame-retardant; copper core with multi-strand stranding; polyethylene insulation; polyvinyl chloride sheath; aluminum/plastic composite tape for shielding – split/shielded design; DCS intrinsically safe cable
This post was last edited by gaiyin47 on 2021-4-23 at 11:13. For ZR-KVVPR flame-retardant (ZR) control (K) cables with a shielded (P) soft (R) construction, this model is suitable. Single-core wires are usually 2*1.5 or 3*1.5, with wire diameters of 1.0mm2 and 1.5mm2, depending on the distance between the locations. Generally, for a distance of over 200 meters from the factory, 1 mm2 is sufficient. It’s better to use 1.5mm2, as it results in lower impedance and less voltage drop. Don’t worry about the cable model; they vary from manufacturer to manufacturer. Submit your request and have the manufacturer provide you with the models.