Questions tagged [isolated]
The isolated tag has no usage guidance.
79
questions
0
votes
1
answer
52
views
ESD on two different materials
I am conducting ESD testing on two types of materials with a setup that closely follows the 61000-4-2 standard. We have incorporated both isolation material and a ground plane into our setup.
When I ...
- 536
1
vote
1
answer
36
views
Measuring Line to ground voltage of an ungrounded, isolated output (secondary) in an single phase 400/24v transformer
So we have this electrical control panel in which we have a 24v dc and a 24v ac circuit both. The 24v ac is coming out of a 400/24v transformer. The transformer primary is being fed from a 3-phase ...
- 41
0
votes
0
answers
54
views
Isolation transformer isolation side earthing best practices
I have been told I need my equipment to be isolated, but I want to make sure I fully understand when an isolation transformer is no longer isolated. The equipment I have clearly has an earth ground, ...
- 11
1
vote
2
answers
102
views
Isolated negative Vdg on MOSFET
This is probably crazy, but: What would happen if I apply a negative voltage between the drain and the gate of a MOSFET (or positive from gate to drain), assuming that this voltage comes from an ...
2
votes
1
answer
267
views
Is this the correct isolated circuit to control a relay output from a Raspberry Pi GPIO?
I am making a circuit for an optically isolated relay output controlled by a Raspberry Pi GPIO pin.
I am not sure if this is the correct way of doing it. Can someone please help me out on this?
Edit: ...
- 23
0
votes
3
answers
379
views
Safety of grounded and isolated AC in medical systems
Introduction
I try to make more sense of safety and reliability of grounded and isolated electricity. I divided the problem into 3 stages:
Power-transmission line
Household electricity
Electrical ...
- 1,424
0
votes
4
answers
140
views
Isolated voltage measurement circuit or sensor
Which circuit or sensor can measure a voltage range of 24 V DC (the power supply for a motor)? The circuit is fully galvanically isolated from the ESP32 used. Does anyone have any ideas on how to ...
1
vote
1
answer
78
views
Can I use isolated power supplies by connecting the input gnd and output gnd together?
I need a converter module that outputs +15 -15 Volts to feed the opamps. My input voltage is 24V.
I found that UWE1215S-3WR3 for this application. UWE1215S-3WR3 datasheet
I know that normally the ...
- 756
0
votes
0
answers
30
views
Working (real) voltage offset of isolated DC/DC modules
I do not see in 95% maybe cases for isolated DC/DC modules such a parameter like "Maximum-rated isolation working voltage" but see something like "I/O isolation 5000 VAC rated for ...
- 95
0
votes
2
answers
68
views
How to control unrelated circuit with a transistor?
I recently hit this issue that seems to be too complicated for google to find results for.
Is it possible to control a different circuit with a transistor from a separate circuit?
Below is a ...
- 15
0
votes
1
answer
54
views
How to tell if buck converter outputs are isolated? [closed]
I'm looking for a cheap CC CV buck converter with separate grounds.
How can I determine which converters have isolated outputs and how can I find such modules?
I know sites like ebay and the likes are ...
- 930
2
votes
2
answers
321
views
Isolated power supply: Protective earth connected to secondary ground
We are developing a device that contains an isolated AC/DC power supply, from mains voltage to 3.3V. A colleague wants to connect the protective earth (chassis ground) to the secondary 3.3V side ...
- 76
0
votes
0
answers
22
views
Changing grounds during start up
We have a system with a CANBUS controlled Battery Management System (BMS) and a PCB with microcontroller. The BMS provides 12V and an isolated CAN ground at all times, but naturally only supplies main ...
- 31
0
votes
1
answer
44
views
About isolated Power Supply Remote Control Mode
I am using mean well SCW12 series isolated dc dc smps power supply module. The thing that confuses me is the working principle of the r.c pin.
(PowerON: R.C. ~ -Vin > 4VDC or open ; Power OFF: R.C. ...
- 756
2
votes
2
answers
93
views
Is that good application paralleling power copper pours on PCB for heat dissipation and connect with via?
I am using isolated SMPS power module in my PCB layout. I found good examples about layout here. https://www.powerctc.com/en/node/5139.
I have completed routing the isolated SMPS power module from the ...
- 756