How to get rid of the HDTV interference of the machine?

Question

Electronics

I am a system administrator of an enterprise and I have a problem with the operation of the equipment for which I am responsible, namely: computers, routers, switches (switches), barcode scanners. HDTV machines for soldering stretch ceilings are connected to the general electrical network of the workshop. USB and COM ports, WiFi modules, Ethernet (LAN) ports on computers, laptops and routers are turned off, hard drives (hard drives) stop working, uninterruptibles click (they do not see power from the network). I sin on pickups through the power grid, or on magnetic pickups from transformers, but magnetic ones are the least of all. to the far cut-out PC more than 10 meters and obstacles in the form of walls, etc. Malfunctions are not systematic, i.e. Not every start of the machine affects the operation of the equipment. The machine is garage Chinese, but the scheme is like that of all HDTV machines of its kind. Grounding was carried out without touching metal surfaces and wires. We consider all possible solutions, because workflow is difficult. Now I don't even have crutches. Help me please. Honestly, I’m not strong in electrics, they helped me write the text. So there will be stupid questions. Photo of the machine, compressor at the link to Yandex.disk. If necessary, I will take the necessary photo or I can arrange the necessary measurements.

Yandex.Disk

Answer 1

If the problem is over the network, then the first thing to do is to look into the machine to see if there is an input filter. If it is not there, then you need a filter at the input of the machine, so that the interference from it does not go to the network. 2 try an online bezpereboynik on problematic equipment (they have galvanic isolation between input and output).
I don't understand the following sentence:

Grounding was carried out without touching metal surfaces and wires.

What is it like? On the contrary, all equipment must be grounded. All PCs, if properly grounded, should work well, because a grounded steel case should shield everything well.

Answer 2

To look at the cosine phi at the moments of launch. Connect a power quality monitor - then it will be clear. Perhaps you need a power factor corrector, or an inverter-type stabilizer for the entire office (which is much more expensive).

Answer 3

Filters, stabilizers... What the hell are you from?
The solution is elementary simple, bring the wiring in line and you will be happy

Answer 4

Since the uninterruptible switch clicks and does not see the network, then the network really disappears there.
Just make sure the wiring is rated for the correct current. If during start-up the voltage in the network sags, then it is not surprising that it is buggy.

Answer 5

To repeat what was said here ...
1. Roman Bukivsky
Everything is correct. I installed an autotransformer to connect the welding machine, otherwise half of the SNT resorted to swearing that nothing was working for them.

Grounding was carried out without touching metal surfaces and wires.

Grounding is better to have a separate one. It is advisable to check that it is not set to zero))). This happens and is acceptable, for example, in residential buildings.
2. Alexander
Intersects with point 1. Such devices sometimes need to be connected with a harness. Most likely capacitors, but the circuit may be more complicated. Check the documentation for the device. There is such a direction in electrical engineering when the sinusoid of voltage and current begins to diverge. Needs to be leveled.
3. evgeniy_lm
For a long time I scored on filters))). I put cheap stabilizers to reassure people. But the wiring needs to be revised.
4. funkerwolf
See point 1. Rather a filter. That's right - you need to untie the electrical circuits. The earth is not dull here. IMHO
5. lonelymyp
I started to click from the kettle. The wires are almost irrelevant. The tension sags. We must measure. Do not forget that the uninterruptible power supply must be calibrated, or rather the battery.
I will add.
1. Power is not enough. Entrance transformer box + wires. I had: turn on the kettle - the voltage drops to 180 V and after 10-15 minutes the bag is knocked out. In one case, it was decided by an additional input. In another, it was not decided in any way - it was necessary to change the input transformer, but no one wants to pay))).
2. Magnetic fields. Incredible, but possible. Pickups from an alternating magnetic field are significant and affect any electronic components. In the era of BNC connectors, if there are such who remember what kind of animal, I measured the potential difference - 150-250 V came))). It's in a wire that has nothing to do with sockets at all. Stupidly grounded to the heating battery))).
Decision.
1. Autotransformer - noise isolation within the network. You can still put all sorts of devices for stabilization, but remember too lazy.
2. Checking the input power - what current can they give you. Check with current collectors what current you have.
3. Checking the connection of your devices. And they like to cut off chokes and capacitors)))
4. Separate inputs. And for each input a separate autotransformer.
5. If you have a crazy current in the wires and sparks on the brushes, shield EVERYTHING. And foil on the head)))

Answer 6

Put a voltage stabilizer on a machine like Resanta so that there is at least some kind of galvanic isolation for power supply and pilots like Pilot Single / Most MHV for computers. Well, at the extreme, still call electricians to check the grounding.

Answer 7

To separate flies from cutlets, try to start the machine with the 220 UPS disconnected from the line and other equipment related to computers - printers, scanners, etc.
If it helps, then solve problems with power filters on the machine, galvanic isolation, check grounding, voltage drop during start-up.
If it does not help, then the problems are in the tips, they are much more difficult to solve.

Answer 8

If you do not start the machines, then everything is fine?
Interruptions only during the start-up of machines? Or during their work too?
What wiring do you have? The cable section may not be enough