Can a compensation wire be used as a regular signal wire?
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Hello everyone. The warehouse management in my company is rather chaotic. Recently, when goods were being dispatched, I found that my more than 1,000 meters of shielded compensation wire (model: ZR-KX-FVP) was missing; I have no idea who took it. I checked the areas where thermocouples are installed, and none of those locations had my specific model of compensation wire installed there. So I wonder if it’s possible that the electrical personnel don’t understand how to use compensation wires, and have used them as ordinary control cables, power cables, or telephone lines? ? ? Is it possible? Is it okay to use them interchangeably like this? Is there any difference in how compensation wires transmit current or voltage signals compared to other ordinary shielded copper-core cables?
Compensation wires are special wires made of alloy copper; based on the model you provided, it is nickel-chromium-nickel-silicon, which has a relatively high resistance and tends to generate a lot of heat when in use. It is recommended to find and replace it as soon as possible to avoid greater losses.
When a compensation wire is used as a regular wire, it is equivalent to inserting a thermocouple into the circuit; if there is a temperature difference at both ends of the compensation wire, a thermoelectric potential will be generated. If this potential is used to transmit control signals, additional errors will occur, leading to incorrect display and control； If used as a power source, the high resistance will cause severe heating, which may lead to accidents~~~
It cannot be used as a regular cable.
It must never be used as a substitute for cables; since it is made from special materials, it functions like a thermocouple. Using it for transmitting signals from instruments can lead to significant signal errors, and when used to carry electrical current, it can cause the wires to overheat or short-circuit, thereby easily resulting in production accidents. It is recommended to identify and replace it as soon as possible.
Sure, that won’t work. Compensation wires serve to extend the electrodes, and they must never be used together with ordinary cables.
What was said upstairs is all very accurate; I express my support. I won’t repeat it again
In many cases, thermocouples do not require compensation wires; for example, with a Type B thermocouple where the hot end is at 1500° and the temperature at the terminal is 50°, the temperature difference when using a compensation wire versus not using one is only 0.2°. Compensation wires can also be used as signal wires; there is no problem using them for 4-20mA signals. They can be used as power lines as long as the load power is not too high, but they must never be used as signal wires for thermistors. The principle is that the load resistance must be large enough to be used.
Hehe, someone took it away to be used as wire.
It can’t be used as a signal wire, right? One of my colleagues placed it incorrectly; there’s a short circuit on that end, and there’s a 100-ohm resistor on this end
There is no issue with transmitting 4-20mA signals