4:27
1 - Harmonic solutions - what is a line reactor or DC choke and how does it work?
Eaton
5:21
2 - Harmonic solutions - how can I correct harmonics with transformers - K-rated, harmonic mitigatin
8:04
3 - Harmonic system solutions - how can I eliminate or cancel harmonics with phase shifting transfor
7:27
4 - Harmonic solutions - how does a passive harmonic filter work?
3:44
5 - Harmonic solutions - how does a drive dedicated or broadband filter work?
3:57
6 - Harmonic solutions - how does an active harmonic filter or harmonic correction unit (HCU) work?
4:43
7 - Harmonic solutions - how does an 18 pulse drive work?
3:21
8 - Harmonic solutions - how does a 24 pulse medium voltage drive work?
5:46
9 - How can you determine you have a harmonic problem by identifying symptoms and sources of harmoni
6:42
10 - Where do you start with harmonic analysis once you have identified that you have a harmonic iss
4:09
11 - Where do harmonics come from and how do the harmonic currents flow - what is the Ohm's Law expl
3:15
12 - Does a 5% reactor cause a 5% voltage drop at my drive? What if I used a 10% reactor?
7:14
13 - Harmonics and generators – what do you need to know?
4:38
14 - Can I increase my linear load to cancel my harmonics?
4:12
15 - Should I be more concerned with 100A of 5th harmonic or 80% THD?
3:37
16 - Do harmonic and 60 Hz load currents change at the same rate?
5:47
17 - How do I know if I have harmonics on my system based on the symptoms?
6:02
18 - What do you mean by "Harmonics are not a problem unless they are a problem"?
11:11
19 - IEEE 519 Standard for harmonics – what do I need to know and where do I start?
2:58
20 - Should I care more about harmonic voltage or current?
6:12
21 - What are the typical characteristic harmonics for electrical loads and what do their waveforms
3:05
22 - How do you calculate total harmonic distortion or THD and total demand distortion or TDD?
2:56
23 - What is a nonlinear load?
3:52
24 - Who cares or should care about harmonics?
3:49
25 - How do I know if my project will have a harmonics issue and how do I determine what the right h
9:04
26 - How does harmonic phase shifting work including a detailed mathematical explanation to reduce s
5:04
27 - What if I had 4000% Ithd on my neutral conductor?
5:32
28 - Case study examples
4:16
29 - Where can I get more information to learn about harmonics?
4:26
30 - Why do most UPSs have active front ends but VFDs have diode rectifiers?
3:50
31 - What is the difference between EC motors and motors with VFDs?
6:46
32 - What is the difference between a tuned and de-tuned filter?
4:17
33 - How do harmonics relate to power factor and displacement power factor?
4:46
34 - At what percentage of my transformer loading should I be concerned with harmonics?
9:50
35 - What is harmonic resonance and how does it work?
4:21
36 - If I see harmonics on my meter, breaker, etc. should I be concerned?
5:07
37 - Is a temporary measurement as good as a long term trend for harmonics?
5:11
38 - What does oversizing my electrical equipment do for harmonics (k-rated transformer, generator,
2:33
39 - How do I calculate total demand distortion (TDD)?
5:31
40 - What is the difference between THD and TDD?
6:41
41 - How does a harmonic filter work?
3:18
42 - Is it more economical to buy low distortion loads or to apply harmonic correction?
5:15
43 - Why is my harmonic distortion higher at night than during the day?
3:35
44 - AC line reactor vs DC choke - which is better?
45 - Do I need to worry about input harmonics, output harmonics or both with a VFD?
3:16
46 - Does a drive isolation transformer do the same thing as a line reactor?
3:33
47 - Do I need a harmonic filter for every drive or is it better to install a single filter for all
48 - Why does it seem like voltage THD is always lower than current THD?
4:18
49 - Why are harmonics intermittent (not always there at certain times, days, etc.)?
4:03
50 – How does a delta zig-zag transformer eliminate or minimize harmonic currents?
8:34
51 – How much power do I lose because of harmonics? Do I pay for harmonics on my power bill?
52 – Why is voltage distortion bad? Are multiple zero crossings on voltage from harmonics a bad thin
5:13
53 – Do all harmonics come from the loads or do some come from the utility source?
3:41
54 – Does a delta-wye transformer cancel all harmonics?
5:03
55 – Do you connect a harmonic filter to ground?
5:14
56 - Do harmonics from one load naturally cancel with harmonics from another load.
4:10
57 - How do harmonic currents really add up to make a distorted waveform? How do you calculate Tota
5:02
58 - Can you change an existing PF correction capacitor into a harmonic filter?
3:59
59 - If my harmonic distortion on my neutral exceeds 100%, should I be concerned?
60 - Does a single phase VFD have the same neutral current issues as computer or LED lights?
4:08
61 - If you feed a 3-phase drive with single phase input, are the harmonics the same?
2:44
62 - Do I need to specify a 200% neutral on my panelboard and transformer if I have a lot of harmon
5:38
63 - Why does my harmonic current increase when I add an active harmonic filter?
4:37
64 - Does a harmonic mitigating transformer eliminate all of my harmonics?
3:46
65 - Is the utility sending me harmonics?
66 - What is the difference between single phase harmonics & three phase harmonics?
4:47
67 - When do yo need a harmonics study?
2:00
68 - If I apply harmonic producing loads, do capacitors amplify the harmonics produced?
69 - What is the point of common coupling (PCC)?
2:57
70 - What is the difference between IEEE 519 of 2022 vs previous standard?
