Skip to main content
Electrical Engineering

Questions tagged [fault]

Ask Question

The tag has no summary, but it has a tag wiki.

164 questions
Newest Active Bountied Unanswered
Filter by
Sorted by
Tagged with
0 votes
0 answers
45 views

My assignment: A simple power system consists of Generator of reactance j0.26 p.u., transformer of reactance j0.16 p.u. and a circuit breaker connected to a system of reactance j0.19 p.u. A three-...
joshuaebs's user avatar
  • 3
1 vote
1 answer
73 views

I’m working on a school project where I need to build and simulate a DC circuit in MATLAB Simulink.The goal is to simulate RL-transient fault protection and test selectivity between fuses. I have ...
Andrè's user avatar
  • 11
1 vote
1 answer
68 views

Thanks for taking a look at my problem. This is my first integrated circuit design ever! I'm using an esp32 to drive an DRV8833 h-bridge driver. I've followed the datasheet "https://www.lcsc.com/...
kyotee89's user avatar
  • 89
2 votes
1 answer
105 views

I'm used to TI transceivers so I don't know if this is to be expected or not. I have a whole bus using these transceiver (five nodes). Now, the datasheet specifies: Suitable for 12 V and 24 V ...
Lorenzo Marcantonio's user avatar
  • 9,036
1 vote
0 answers
65 views

I am performing the FRT for PV plant. I am not able to understand why there is a spike in reactive power when clearing the fault. In addition to this, can anyone please also guide why there is not a ...
Israr Ali Jatoi's user avatar
  • 11
1 vote
1 answer
183 views

I have a functional RTL simulation. I would like to check if bit flips at certain critical moments can cause errors in the circuit outputs. In the testbench, I can only manipulate external signals, ...
ArkhamEngineer's user avatar
  • 53
0 votes
0 answers
43 views

How can I create a circuit to detect if a motor is connected or not without running the motor? I'm designing a power wheelchair and need to implement an offline open circuit detector for a Permanent ...
Sanjay TM's user avatar
  • 101
0 votes
0 answers
39 views

I have been designing a PIR sensor circuit for occupancy sensor. We have been facing problems like fault detections most of the time when we turn on air conditioning. There is also issues like the ...
Aakas Pulikkal's user avatar
  • 29
0 votes
2 answers
124 views

On our subsea robot, we have an isolated power supply (converting 3-phase AC into 320 Vdc). For security reasons, we have a line monitor monitoring the resistance between protective earth and both 0 V ...
Sandro's user avatar
  • 9,616
0 votes
0 answers
254 views

I designed a motor driver with the new Texas Instruments DRV8262 at its core. It will be used in robots controlled by an ESP32. It works well when using non-PWM signals to switch the outputs in PWM ...
Louis's user avatar
  • 1
0 votes
1 answer
79 views

I was trying to simulate a circuit where it can detect grounded neutral conditions in the household. I need to have a current transformer which can detect the current differential ans sends a signal ...
M S's user avatar
  • 1
0 votes
1 answer
225 views

Recently my laptop has been showing a strange effect on its monitor: This is supposed to be a black screen, but the bottom fifth or so is affected by some kind of interference pattern. The pattern is ...
Rocketmagnet's user avatar
  • 28k
0 votes
4 answers
567 views

I'm helping my friend's kid with a school project where their team has to produce a small ROV. Most of their design I was able to review and help make corrections with them but I'm stumped at one ...
Jedi Engineer's user avatar
  • 288
1 vote
0 answers
130 views

I am working on a project for which I needed to design a small linear regulator circuit in order to supply 8.2V for reading out sensors. I chose to use LM317, since it is quite simple to design and ...
karolista's user avatar
  • 11
0 votes
3 answers
162 views

I have designed and built a clock, that uses a microcontroller to drive a 4x7 segment common-cathode display. Each digit is driven sequentially, with all appropriate segments of that digit driven in ...
Sod Almighty's user avatar
  • 1,719
3 votes
2 answers
208 views

I am in Peru and was helping check ground rod to line and neutral and see higher than one leg to ground voltage. This is at a plant with 3 phase power 220/440 volts. The local utility doesn’t provide ...
Dososo56's user avatar
  • 31
0 votes
0 answers
46 views

I got the task to upgrade one of our products to comply with the requirements of IEC 60335-1, which means, that no safety function must be lost in case of a single component fault. To save space and ...
christoph's user avatar
  • 780
1 vote
1 answer
54 views

I'm fault finding for a Korg M50 Synthesizer. Symptoms: on every boot a message appears saying the device is updating the left/right control panel firmware, after which it requests a re-boot. ...
aaronsnoswell's user avatar
  • 309
1 vote
0 answers
104 views

I want to calculate the short circuit current contribution of my PV plant. I have only data from the inverter manufacturer but I am not sure if I have to simply add up all the inverter's short circuit ...
Smrtngy's user avatar
  • 37
1 vote
2 answers
123 views

As the title asks, is that possible? By "easy access" I mean through some connection I can find inside my home, rather than burying my own grounding electrode and running wires from it to ...
Outis Nemo's user avatar
  • 186
7 votes
4 answers
540 views

I designed and got a PCB manufactured for the first time, and have soldered the component and powered it up. However it is not behaving as expected. I think I may learn something by everyone here for ...
David777's user avatar
  • 1,615
2 votes
1 answer
94 views

I have designed the MAX8808 LiPo charger IC into one of my designs. It doesn't seem to be working, in the sense that no current is flowing into the LiPo cell, despite all of the DC conditions ...
Rocketmagnet's user avatar
  • 28k
4 votes
2 answers
285 views

From the paper Fault Template Attacks on Block Ciphers Exploiting Fault Propagation, in the concept of Automatic Test Pattern Generation (ATPG), two events are required to perform in sequence: Fault ...
Mohammadsadeq Borjiyan's user avatar
  • 43
0 votes
0 answers
29 views

In a Line-Line-Line-Ground symmetrical fault, is the fault current on each phase also displaced from each other by 120°?
ethelrl's user avatar
  • 99
0 votes
1 answer
69 views

I have a vacuum tube power supply which isn't producing the correct output voltage. I have removed the tube and all that is left is the transformer, inline 22 ohm resistor, CR201/202, R202/203 and ...
Tom's user avatar
  • 95
1 vote
2 answers
4k views

I was trying to measure the voltage across two connectors that connect to a 3-pin, 13 A plug as part of troubleshooting, to verify I had circa 230 VAC present. However, when I connected my multimeter ...
Brandon Kellett's user avatar
  • 323
0 votes
0 answers
177 views

I have a faulty circuit board taken from a garage opening unit powered by a transformer. I have 25V from each of the transformer terminals (4 of them), 50V on the 24V relays and all terminals have ...
CptChronic's user avatar
  • 33
0 votes
0 answers
105 views

Assuming I have the following system: and a single-phase fault is on the 2.4 kV side. How do I calculate the voltage between the neutral resistor and ground? How do I calculate the zero sequence ...
Felipe's user avatar
  • 117
0 votes
0 answers
82 views

Electrical transmission lines can face various types of short-circuit faults, for example, line-to-ground, line-to-line, etc. How do power system engineers find the fault location by observing from ...
Wanderer's user avatar
  • 325
6 votes
5 answers
3k views

We have a bunch of ARM microcontrollers on test at the moment. The test runs for 360 hours and mostly completes without a hitch, but very occasionally, one of the microcontrollers will hang. We have ...
Rocketmagnet's user avatar
  • 28k
4 votes
0 answers
188 views

Is it possible to electrically damage a microcontroller (or any chip) in such a way that it becomes very sensitive to mechanical stress? Some background: We are developing a board with 7 identical ...
Rocketmagnet's user avatar
  • 28k
1 vote
1 answer
132 views

In MV grid with no distributed generators, 50-51 overcurrent relays are used to detect both phase to phase faults anf 3-phase faults. In Italy, time independent characteristics are used inside these ...
Samuele Benito Di Gioia's user avatar
  • 545
0 votes
0 answers
51 views

im trying to do fault analysis on image 1. I was little confused for the line as there wasnt a j component so unsure how to find the pu. In images 2 and 3 show a line with R+jX and the R id ...
kingkunta's user avatar
  • 1
2 votes
3 answers
816 views

Question: Is there a way to implement with discrete components the 70V CAN bus fault protection found in some transceivers, such as TCAN1051H-Q1? Background: We are using the CAN transceiver ...
lmlmlmlm's user avatar
  • 21
0 votes
1 answer
376 views

I was planning on making a voltage controlled resistor using a power MOSFET in order to load one 12V lead acid battery. I tried implementing the circuit below; everything was going well for a few ...
A.H.Z's user avatar
  • 653
1 vote
1 answer
321 views

Usually fault impedances are resistive type. But is it possible to have a mix of resistive and reactive component in fault impedances? Looking at many simulation tools, they give the possibility to ...
Samuele Benito Di Gioia's user avatar
  • 545
3 votes
1 answer
763 views

In this question, I am able to find the per unit phase voltages using the symmetrical components. Taking the base MVA and base voltage to be the same as that of the alternator, \$ (I_a)_1 = \frac{E_a}{...
curious_direwolf's user avatar
  • 79
1 vote
1 answer
2k views

Good day to all! I am planning on designing an electric vehicle architecture from scratch. My main DC bus voltage is 400 V. However, I have got different voltages in my system. I have got a 600/400 V ...
gr3en_apple's user avatar
  • 46
2 votes
1 answer
234 views

One of the Hot wire (#10/3) going to my oven appear to have experienced a sudden very high in rise temperature inside the junction box, melted the connector, creating a contact with the face plate ...
Denys Picard's user avatar
  • 31
0 votes
1 answer
1k views

My commercial wiring textbook and several documents discussing fault current calculations stated "The L-N fault current is higher than the L-L fault current at the secondary terminals of a single-...
solenoids are cool's user avatar
  • 87
2 votes
0 answers
166 views

For a project I'm working on, I want to use the Clarke Transform to detect faults in a power system. To do this, I already wrote a script in Python which returns the sine wave behavior of the Alpha, ...
Juan Pablo Naranjo's user avatar
  • 21
0 votes
1 answer
316 views

What is the difference between a fault passage indicator (FPI) and a relay (for example relay 50, 51, 67N) ? Are they the same thing?
Samuele Benito Di Gioia's user avatar
  • 545
1 vote
1 answer
990 views

I'm a high school student trying to make a light tracking single axis solar panel. I am using an Arduino Uno rev3 board. When I first finished building it, the system failed to operate. I spent a few ...
ElevenBits's user avatar
  • 21
1 vote
0 answers
134 views

BACKGROUND: Domestic 3 phase 220VAC supply in Thailand. Power company meter is 4 wire GE 3 phase 15A/45A. Massive power bills when mains breakers were turned off (back in home country for 9 months ...
David Supastore's user avatar
  • 11
0 votes
1 answer
97 views

In Anderson's 1995 Analysis of Faulted Power Systems, there is the below example I am required to calculate the sequence network for the fault occurring at C. To calculate the resistance of the load, ...
Shankar Ramharack's user avatar
  • 1
0 votes
1 answer
112 views

My fluorescent lamps (and other devices) are making clicking sounds. I want to reproduce these clicking or popping sounds or get an idea of how one might produce such sounds in electrical devices or ...
p4rch's user avatar
  • 1
0 votes
0 answers
162 views

Tl;dr at bottom Recently I found old bench power supply in my closet and tried to test it but display kept on displaying 0.00v and 0.00a - the power supply is voltage and current regulated and has two ...
bestestefan's user avatar
  • 101
-1 votes
1 answer
49 views

There are a few methods to do power system fault analysis, like the per-unit method, MVA method, and impedance method (Ohmic method.) I am doing fault analysis using per unit symmetrical component ...
Prasad's user avatar
  • 1
1 vote
3 answers
3k views

Suppose normal residential main breaker panel (not subpanel) is wired correctly except the neutral bar is not bonded to ground. Assume a 15A breaker in the panel powers an exterior light with a metal ...
Ken Smith's user avatar
  • 111
3 votes
1 answer
152 views

First a short introduction: (the question is below the first image). The capability of fault ride-through of wind turbines is the most important requirement related to national grid codes. Based on ...
CG.'s user avatar
  • 155

1
2 3 4