When interference due to high voltage(or high current)..?
Because i have this problem where in some analog signals the current increases due to interference and other the current decreases
Answer:
Bad engineering. The instrument signal wires need to be routed so that they do not have the problem of being to close to such interference sources.
The changing of the intensity of the magnetic fields in the high voltage wires is the source of the problem. Extra voltage is being induced into your control circuit. There are only 3 things to do, change to a computer based system that can discriminate against the interference, put up with it, and the errors it causes, or move the signal wires. You might try using ferrite chokes at the transmitter, controlled device(s) recorders, power supply. The ferrite chokes might resolve the issues. Try this first, you might be the hero that your management is needing.
The best solution to this sort of thing is to use twisted pair cable. Proven every time. It is the secret as to how Ethernet is routed through existing building telephone cabling. Most pick-up problems are magnetic in origin and twisting the sensor cable is very effective there. If you have a high frequency electric field situation, shielding could be useful. If you go to shielded twisted pair, be sure to ground the shield at only one end, preferable the instrument end. Shielding without using twisted pair is a waste of time.
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