This is indeed a very good vdeo with crystal-clear explanations. Nice as well to hear a lady's voice explaining Physics. We don't have this that often. V.good job. Thanks.
You ask what is a relay used for, its so some thing small can control something much bigger. In the video I switch on the big light with a small switch.
hi may I know the typical switching frequency of a relay made to buzz like a motor when looped in nc position? I thinks its definitely not 50 or 60 hertz but what kind of range can we expect it to buzz around?
I have an older sears furnace, no board just relays that fan comes on immediately, it works otherwise but im not sure its wired correctly i removed the fan limit wire and it didnt care at all, the 90-340 switch has terminals 1 and 4 jumped with a wire, removing that the fan doesnt run, why would a jumper wire be placed on 1 and 4. Relay tested good though. Wouldnt fan limit wire have to go to the coil connection.
Its a rhetorical question. If you listed uses for a relay you could go on for a very long time, then some one (like you) would say ah, but you didn't mention that (for example) lifts use relays, and so it goes on. As an aside, modern fire panels don't often use relays for the sounders, since they are not as reliable, they use high power transistors, relays are provided for auxiliary switching.
You ask why don't I mention about a 4 pole relay ? I could. I could also mention a triple pole relay, where would it stop? read the title again. It clearly says "how a relay works" that is what this video is called, and that is what it does.
relays have nc or no contacts already built for the intended use by the customer..its a spring loaded switch that turns on when magnetic power is applied and switches back to off position when magnetic power is cut off as the spring is returned to its original position...this is called no point of switching..for nc its vice versa magnet pulls a switch already in on position to off position and as magnet power is cut off the spring pulls the switch back to its original nc position
Electricity or no electricity, think of a circle an a light switch that is on, in order for the light to be on you need a full enclosed circle with electricity nc, now when you flip the switch off you cut off the electromagnetic source, you no longer have an electro magnet an It makes a lil gap in your closed circuit like the CZcams replay icon, you now have a no circuit now and no light, flip the switch on on again sending voltage to the electromagnet complete your circuit it become a nc circuit again. Drinking cuz it's Mexican independence, so if I made no sense forgive me
basically. 1 current runs through the circuit and electromagnet. 2. The magnet pulls on the arm and that completes the circuit. IF the current gets too low it cant pull on the switch so the circuit is broken. This can be reversed to be turned into a fuse. So when the current gets too high, it increases the electromagnets strength, which can pull the circuits switch out to stop an overload
You ask "why use a relay, why not connect direct to a battery?" Suppose it was a mains light, and you have a tiny switch, the switch would soon melt / wear out. Or put it this way. can you lift a car to change a tyre? of course not, so you use a small thing (jack) to lift a big thing (car)
it prevents you from needing high amperage wire going through the dash panel for every switch, and can instead use smaller low amperage wires and switches that would normally melt at the high power usage of your electrical components.
Relays are switches that open and close circuits electromechanically or electronically. Relays control one electrical circuit by opening and closing contacts in another circuit. As relay diagrams show, when a relay contact is normally open (NO), there is an open contact when the relay is not energized. When a relay contact is Normally Closed (NC), there is a closed contact when the relay is not energized. In either case, applying electrical current to the contacts will change their state. Relays are generally used to switch smaller currents in a control circuit and do not usually control power consuming devices except for small motors and Solenoids that draw low amps. Nonetheless, relays can "control" larger voltages and amperes by having an amplifying effect because a small voltage applied to a relays coil can result in a large voltage being switched by the contacts. Protective relays can prevent equipment damage by detecting electrical abnormalities, including overcurrent, undercurrent, overloads and reverse currents. In addition, relays are also widely used to switch starting coils, heating elements, pilot lights and audible alarms.
It's an automated switch. By pressing one button (start), you can control multiple processes (a pneumatic cylinder, a light and a screen can turn on at the same time). The relay in the video is typically used for low voltage applications (24V-120V). For anything higher than that, such as a 480V/575V motor, we use a contactor.
relay make fantastic switching in terms of mechanical switching..they were used long ago in switching high step up signal coils and stuff that sent wireless signals from high voltage coils sort of like a radio! the concept is super simple the coil is an electromagnet that become magnetised when shorted..this magnet then pulls a tiny spring lever switch that is wired to some other load..this switch can be in on or off position when the pull is energised depending on the relay design...it basically uses a part time magnet to switch on or off another switch that usually connects to a segregated isolated load..
Electricity, a good example is your cars A/C compressor which has an electromagnetic clutch. When the switch is off no voltage is going to the compressor, thats normally open, making no contact with the rest of the circuit, like a circle with a gap in it like the CZcams replay icon, but on that 90 degree day you turn on your a/c, that button or nob sends voltage to the a/c clutch magnifying it, making contact with the rest of it's circuit completing it now you have voltage going through the whole circuit making it a normally closed, giving you that nice cold air, one you get cold enough and turn off the ac you cut the voltage off, demagnitizing the magnet an It opens the circuit again losing contact with the rest of the circuit which would bring you back to being normally open an hot an sticky
Two people have now said can I do more. I have to ask, what more would you like to see? Please bear in mind, if I show how to connect a relay to do "this" some one will ask how do you connect it to do "that" I have to draw the line some where.
bluecylinder id like to see more sounders can you put the model of the device in the description too id like to see if i can get some of these sounders
Thanks for putting this online, really needed to know this
thanks and great explanation.
This is indeed a very good vdeo with crystal-clear explanations. Nice as well to hear a lady's voice explaining Physics. We don't have this that often.
V.good job. Thanks.
Thanks for showing very good to know
Nice explanation !
You ask what is a relay used for, its so some thing small can control something much bigger. In the video I switch on the big light with a small switch.
Awesome demo
hi may I know the typical switching frequency of a relay made to buzz like a motor when looped in nc position? I thinks its definitely not 50 or 60 hertz but what kind of range can we expect it to buzz around?
thank u for the video..appreciate it
Nicely explained👍
AWESOME THANKS
excellent educative videos can you show more of it?
Very clear and very well explained excellent video can you do more.?
Are the LEDs in series with the NC and NO switches?
I have an older sears furnace, no board just relays that fan comes on immediately, it works otherwise but im not sure its wired correctly i removed the fan limit wire and it didnt care at all, the 90-340 switch has terminals 1 and 4 jumped with a wire, removing that the fan doesnt run, why would a jumper wire be placed on 1 and 4. Relay tested good though. Wouldnt fan limit wire have to go to the coil connection.
Thanks that's great observe video channel I like this post
I really appreciate it
Its a rhetorical question. If you listed uses for a relay you could go on for a very long time, then some one (like you) would say ah, but you didn't mention that (for example) lifts use relays, and so it goes on.
As an aside, modern fire panels don't often use relays for the sounders, since they are not as reliable, they use high power transistors, relays are provided for auxiliary switching.
Hai .
When i used a 12v relay to control my motor, it stays on forever. Even when i disconnected the 12v supply to it
good work sir pls do upload more videos
thank u sir
which purpose is used this relay
Hi, where does the cable come from for green led? Same source as the blue led? Thnks
They just share the same "GROUND" cable. Green LED was using the Normally Closed (NC) and Red/Blue were sharing both the Normally Open (NO) and GROUND
You ask why don't I mention about a 4 pole relay ?
I could. I could also mention a triple pole relay, where would it stop? read the title again. It clearly says "how a relay works" that is what this video is called, and that is what it does.
are those 5.6 K Ω resistors? Thanks for this video! ☻☺☻☺
Close! 5.1 kΩ
cool!
Nice
gooooooooood lesson
This is a good video
What is the operating voltage for the relay?
You asked what is the operating voltage of this relay. This one is 12v dc. Others are available
what is the difference b/w both relays
Well done 😄💗💗
Tell me how the charge light works .
You ask "how the charge light works" I have to ask, "what charge light?"
I don't get how the green LED is on when the relay is de-energized.
WE LOVE YOU!
please explain the wiring of the less
but how is it changing from nc to no........what is responsible for the change????
relays have nc or no contacts already built for the intended use by the customer..its a spring loaded switch that turns on when magnetic power is applied and switches back to off position when magnetic power is cut off as the spring is returned to its original position...this is called no point of switching..for nc its vice versa magnet pulls a switch already in on position to off position and as magnet power is cut off the spring pulls the switch back to its original nc position
Electricity or no electricity, think of a circle an a light switch that is on, in order for the light to be on you need a full enclosed circle with electricity nc, now when you flip the switch off you cut off the electromagnetic source, you no longer have an electro magnet an It makes a lil gap in your closed circuit like the CZcams replay icon, you now have a no circuit now and no light, flip the switch on on again sending voltage to the electromagnet complete your circuit it become a nc circuit again. Drinking cuz it's Mexican independence, so if I made no sense forgive me
basically. 1 current runs through the circuit and electromagnet. 2. The magnet pulls on the arm and that completes the circuit. IF the current gets too low it cant pull on the switch so the circuit is broken. This can be reversed to be turned into a fuse. So when the current gets too high, it increases the electromagnets strength, which can pull the circuits switch out to stop an overload
what is main advantage of using a relay, why don't we add directly to the battery ?
You ask "why use a relay, why not connect direct to a battery?"
Suppose it was a mains light, and you have a tiny switch, the switch would soon melt / wear out. Or put it this way. can you lift a car to change a tyre? of course not, so you use a small thing (jack) to lift a big thing (car)
it prevents you from needing high amperage wire going through the dash panel for every switch, and can instead use smaller low amperage wires and switches that would normally melt at the high power usage of your electrical components.
bravo
Why not you in form about big relay 4+4 poles ?and why you make big relay light connection additional connector from out ???
my school threw away a whole box of these.... today brand new i managed to get one and to see what it does
nic
thanks for the sharing.....actually i curious to know......it is a relay is a same concept with contactor...please someone explain to me
+ADIB RAHMAN
Yes. A relay and a contactor work the same way. A contactor is often much bigger than a relay.
+bluecylinder so they both stor electrical charge?
You ask "so they both store electrical charge?" I suggest you watch the video again.
God I hate these things for some reason I just don't grasp the concept
hector martinez thanks
super
good
I think the relays came from a fire alarm.
what is the purpose of a relay ??
You ask what is the purpose of a relay, I suggest you watch the video again.
Relays are switches that open and close circuits electromechanically or electronically. Relays control one electrical circuit by opening and closing contacts in another circuit. As relay diagrams show, when a relay contact is normally open (NO), there is an open contact when the relay is not energized. When a relay contact is Normally Closed (NC), there is a closed contact when the relay is not energized. In either case, applying electrical current to the contacts will change their state.
Relays are generally used to switch smaller currents in a control circuit and do not usually control power consuming devices except for small motors and Solenoids that draw low amps. Nonetheless, relays can "control" larger voltages and amperes by having an amplifying effect because a small voltage applied to a relays coil can result in a large voltage being switched by the contacts.
Protective relays can prevent equipment damage by detecting electrical abnormalities, including overcurrent, undercurrent, overloads and reverse currents. In addition, relays are also widely used to switch starting coils, heating elements, pilot lights and audible alarms.
It's an automated switch. By pressing one button (start), you can control multiple processes (a pneumatic cylinder, a light and a screen can turn on at the same time).
The relay in the video is typically used for low voltage applications (24V-120V). For anything higher than that, such as a 480V/575V motor, we use a contactor.
Relays uses small voltages to switch on and off larger voltages.
once it closes, what makes it open again
bluecylinder I know there is lol that's what I'm saying, you should have told him the spring opens it.
just being picky tho, don't mind it.
Normal they have a spring, as seen in the video, similar to a solenoid spring combination.
Magic
relay make fantastic switching in terms of mechanical switching..they were used long ago in switching high step up signal coils and stuff that sent wireless signals from high voltage coils sort of like a radio! the concept is super simple the coil is an electromagnet that become magnetised when shorted..this magnet then pulls a tiny spring lever switch that is wired to some other load..this switch can be in on or off position when the pull is energised depending on the relay design...it basically uses a part time magnet to switch on or off another switch that usually connects to a segregated isolated load..
Electricity, a good example is your cars A/C compressor which has an electromagnetic clutch. When the switch is off no voltage is going to the compressor, thats normally open, making no contact with the rest of the circuit, like a circle with a gap in it like the CZcams replay icon, but on that 90 degree day you turn on your a/c, that button or nob sends voltage to the a/c clutch magnifying it, making contact with the rest of it's circuit completing it now you have voltage going through the whole circuit making it a normally closed, giving you that nice cold air, one you get cold enough and turn off the ac you cut the voltage off, demagnitizing the magnet an It opens the circuit again losing contact with the rest of the circuit which would bring you back to being normally open an hot an sticky
"how a relay works in easy to understand language" ?
Two people have now said can I do more. I have to ask, what more would you like to see?
Please bear in mind, if I show how to connect a relay to do "this" some one will ask how do you connect it to do "that" I have to draw the line some where.
bluecylinder id like to see more sounders can you put the model of the device in the description too id like to see if i can get some of these sounders
See the updated (2019) version at czcams.com/video/k3rH2hawGRI/video.html
Bhai hindi me banao
Ratio
:-)))
I didn't know you were a girl
AWESOME THANKS