I'm experiencing significant electrical interference in multiple hospitals when connected to AC power. However, the machine is functioning smoothly when operating on battery power. Further investigation suggests that the electrical wiring issue lies in the connection between the neutral and earth. I'm currently exploring methods to filter out the noise, having experimented with inductor coils and a line filter. My next step is to consider an isolation transformer. Any advice on this matter would be greatly appreciated.
I think you have to clear the situation.
First check the interference come from ac power inlet or from circumference (environment).
As you explained, the machine works with battery without problem. So, note to AC power line.
You need a powerful ac line source, with enough ac current.
Next, a long-distance wiring and/or cable, from power source to machine is very bad. Dropped voltage and alternations comes inside. So, short wiring distance with good copper thickness is critical.
Also, with more distance from electrical power source, the noise source is more effective.
Also if you change a machine location, from a room to other room, it works good sometimes.
But first, a good earth well and a good earth connection is necessary.
Not all sites are equipped with UPS power, and for end users, a portable UPS might not be practical, especially when the equipment is mobile, making it cumbersome to move around. Additionally, due to the wiring setup at these sites, there is interference on the two-prong outlets as the earth and neutral are connected.
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Electrical interference
October 17, 2023 10:42
Certainly, here's the revised version:
I'm experiencing significant electrical interference in multiple hospitals when connected to AC power. However, the machine is functioning smoothly when operating on battery power. Further investigation suggests that the electrical wiring issue lies in the connection between the neutral and earth. I'm currently exploring methods to filter out the noise, having experimented with inductor coils and a line filter. My next step is to consider an isolation transformer. Any advice on this matter would be greatly appreciated.
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Habib Sheikh
re: Electrical interference
October 18, 2023 10:18
Hello,
I think you have to clear the situation.
First check the interference come from ac power inlet or from circumference (environment).
As you explained, the machine works with battery without problem. So, note to AC power line.
You need a powerful ac line source, with enough ac current.
Next, a long-distance wiring and/or cable, from power source to machine is very bad. Dropped voltage and alternations comes inside. So, short wiring distance with good copper thickness is critical.
Also, with more distance from electrical power source, the noise source is more effective.
Also if you change a machine location, from a room to other room, it works good sometimes.
But first, a good earth well and a good earth connection is necessary.
Regards
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sford
re: Electrical interference
October 20, 2023 05:06
confirm that the ground connection is not noisy. You can do that temporarily by using a 2-prong power plug. Why not try using a UPS?
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MoniccaM
re: re: Electrical interference
October 23, 2023 09:25
Not all sites are equipped with UPS power, and for end users, a portable UPS might not be practical, especially when the equipment is mobile, making it cumbersome to move around. Additionally, due to the wiring setup at these sites, there is interference on the two-prong outlets as the earth and neutral are connected.
to rate and post a comment