Relays and Contactors Basics

[b2lee2]

Nice Batman Utility Belt

[atiqulny]

Awesome video. Thanks!!!

[MARSdelivers]

Furnas makes the best contactors.

[ikeg713]

@theuetz yes

[jlovex83]

please sent to my email : ffusanto@yahoo.com



[jlovex83]

i make circuit contain 1 relay to switch on 2 contactor (each contactor conect to one motor 7.5 hp/11A). the problem is when the relay switch on the contactors, the contactors can't work properly,and sparks happen. why this can be happen?

[beemerdoctor1]

magnetism cause by the coils makes the contact touch the other side of the contact..... very basic ....

[ripdavip]

it should be the coolgroup, not geek. very helpfull anyway

[caramoe]

If a HVAC contactors works without problems, however, has some burn/black area, does it need replaced and if not replaced is it causing any problems? I heard it takes a lot more electricity and bills are higher.

[maqsoodu23]

now thats how you explain a relay!! I like!

[PyroChimp75]

DONATE! because dog needs cookies!

[bizarrEaster]

Nice hair!!

[theuetz]

question ... what is the reason behind a 1-pole,2-pole, or a 3-pole contactor? are the 3-pole contactors simply for higher voltage?

[19sept76]

@theuetz does he not mean 3 phase?

[Richardschmid]

@theuetz You can switch single or polyphase...It could be you want to switch several poles in a single phase control circuit to prevent feedback.

[johntrauger68]

@theuetz

3-pole=3 phase 240/480 motors mostly

2 pole=single phase 240 volts as in a pump or ac compressor, or 277 lighting

1 pole=single phase

[yewwwtoob]

@theuetz Really simplfied, some electric equipment needs one live power wire to work(1 pole) some need 2 live wires (2 pole) and some need 3 live wires( 3 pole). In North America one pole and two pole contactors work on single phase ac voltage whereas a 3 pole contactor works on 3 phase voltage. Single Phase voltage is usually 115v 230v and 3 phase voltage is usually 208v 480v 575v or 600 v. Hope this helps.

[RJH33101]

When using hole duct that is already installed. What tool is used to make the holes in the sides bigger (Clean not hack job) for bundled wires to pass through ? I am looking for a video to show me this.

[0117kirk9]

thank you for this video

[stuffmaniac3]

AWESOME EXPLANATION DUDE!!!

[parvezlegacy]

thx for your explanation

[RyanLee1989]

ok i understand how the relay works, but im unsure why they're used. e.g - controlling a massive warehouse's lighting circuit, the control circuit would generally be runing at 12v correct? why would you bother putting it into a control circuit? why not just take it straight from AC powered fuse board...? Please explain to me.

[REWYRED]

@RyanLee1989

in a warehouse the "control" would most likely be 120V but realistically it could be any "standard" coil voltage.. The reason they are used is so you can use a low voltage 12, 24, 120V and only a few milliamps to control a circuit or circuit(s) of any voltage or current rating. Example your 24V thermostat on the wall controlling your 240V central A/C.. They have multiple other uses, like in a "latch" circuit which is very common.

[matthewtchernev123]

if you put p and n on the coil will the power source short

[matthewtchernev123]

if there is 5 pin's on a relay do you have to use a different power source for the coil. if you do you put p and n on the 2 terminals

[rhblakeman]

Not just for controlling a different voltage but moreso for a small current circuit to control a heavy current circuit - starter circuit is one example where small current key switch turns on a solenoid (similar to a contactor) to apply heavy current power to the starter motor. Horn is the same. Small current circuit in the column turns on a relay to switch in a high current horn. Same with headlights.

[jxabregas]

thanks for your explanation about relays, great help, keep up the good work. thanks

jose

[ballsackTbager]

I do this stuff in MInecraft everyday I would call myself a professional electrician

[MsAllahhuakhbar]

actually Japanese contractors are better compared to stupid Americans

[trollowner]

@MsAllahhuakhbar You do know that any association with someone Non-Islamic is against Islamic beliefs right? Which makes you as much of an infidel as the rest. Ranting on youtube about it doesn't make you much smarter than the people you are trying to call dumb and makes you an infidel by association. In fact, you're quite ignorant.

[SEMJASE7777]

230/400V AC In Slovakia ... good explanation...

[rovespierr]

pretty good that help me a lot

[sparkysparks111]

I think this guy is part woodchuck

[Johnnie619]

Does he have to whistle when he talks?

[renan01ize]

one, i observe in the theoretical explanation that you connect the positive side of battery at the common so that in actual operation this maybe opposing bias second you are using old type of contactor and CB we are in a new millenium decade. any way thanks for the effort to explain that...

[mansonia67]

thanks bro...

[ranjit3o]

Basically THe Hi Voltage Depends on Low(24-Volatege)..M i Rite?

[dano415]

nice!

[hubzcaps]

just a tiny taste ...you wont need much .........subliminal message chris rules

[deyenak1]

you are good fella

[domyaska]

great explanation!!!!!! thanks a lot

[monty8008]

Cool video, thanks, it's jst the LIGHT looks suspicious :)

[Goizargort]

electromecanic basis

[loveneko31]

explained all i want

[bongbongsan]

very clear description, very useful, thank you very very much!!!

[sscutellatus]

keep up the gr8 work

[JulianCairo1]

Thanks Guys!

[1trichi]

great explanation. Thanks and keep up the good work

[KillerSpook98]

What, Only 12V, 24V and 120V coils? You forgot the most important one! 240V! Lol, Good explanitory video Duck.

Thermoelectric

[Aussie50]

And 415V coils in Australia!

[KillerSpook98]

Haha, Yeah, I forgot about 415V, The Americans don't have that voltage either (I think). Tis reserved for us awesome Aussies :-D

[Aussie50]

I think they have a similar high voltage 3 phase for industrial applications but not common industrial stuff like small lathes, machine centers etc. IIRC their all 220V 3 phase.

[bigeggone2007]

@KillerSpook98 WE HAVE 3PHASE 480V 277V EACH PHASE TO GROUND..480 BETWEEN 2 OR 3 POLES COMMON IN COMMERCIAL APPLICATIONS

[jwlowe01]

Great Video, I was wondering if you had anything on how to read diagrams?

[Physicsduck]

What kind of diagrams?

[zezimashock]

you forgot somthing

that a relay is not made for fast switching though.

but it was verry use full so ill give it 5 stars,

keep up making good vids :P

[armestam]

I love you guys. If I lived in the area, I'd probably be in the workshop every day. No joke, I'd bring a sleeping bag, and live there.

[armyofmeisbliss]

amazing videos.

you guys make it really easy to understand.

I wish I could live over there so I could hang out, learn and, in the future, teach!