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I’m an elevator tech and and instructor at our elevator apprenticeship education program. I teach solid state and I use your videos to help the students identify what we’re discussing. This video will be incredible helpful for myself and my students. Thank you.
@@starmc26 ok. Look up International Union of Elevator Constructors local offices in your state. Give the local union hall a call to see when their next hiring event is. You’ll need to sign up, take an aptitude test, and be interviewed. Unless you’re a veteran, you’ll be placed at the top of the hiring list.
This is amazing i am on a project that involves latching relay and I was all over the internet trying to understand how it work it was all in vain, all I ended up getting was pictures of MCB( miniature circuit breaker) I was giving up! until this video showed up on my notification and am forever grateful.
Those latching relays are widely used for lighting applications where the lights have to remain on or off after pressing a 3-position switch (on/off/stand-by)
Huh this is actually simpler than I thought. When I saw the title I had in mind a relay with multiple contacts and one set being used to latch the coil.
Nice explanation of how a latching relay is used, but lifts (elevators) don't actually use these type of relays, even on old relay logic controllers. Normal multi-contact relays are used with one of the contacts used to maintain the relay feed to itself until a floor selector system tells it to drop out. Using the latching relay system you describe would be prohibitively expensive and unecessarily complicated to design into the operating system.
Otis elevators use a set/reset relay for 50 odd years by sending voltage one way through the coil making the armature temporary magnetised which keeped the contacts made. To reset the relay voltage was passed the reverse way. This set up was mainly used on their car/landing call relays on the floor selector.
Not being familiar with every lift control system, I stand corrected if Otis have used this type of relay in some of their equipment. However, I would still suggest that the vast majority of lift control systems do not use this type of relay in their circuits as their complicated nature is more readily served by standard relay and contactor arrangements. I was, before retirement, an electrical engineer for a British lift company designing lift control systems. Obviously, in the last thirty years or so, electronics and microprocessor controls have removed the need for these types of electro-mechanical control systems.
@@markdoble736 Does it really matter as it was just used as an example of how you "could" using a latching relay to hold up a landing call acceptance lamp on an elevator.
I actually complimented the explanation of how a latching relay works, I was simply pointing out that most lift control systems don't really use them. I'm sorry if this upset anyone, I hadn't realised how sensitive some viewers could be when being offered some useful information.
I am working on a 2021 Ford F350 w/ factory upfitter switches. We are trying to use upfitter switch 1 as the power source for an LED beacon and 4 LED lightheads. We are trying to wire in a latching relay to cut power (or ground) to the rear 2 lighthead by wiring in a momentary button. When upfitter switch 1 is powered and all the lights are functioning (beacon and 4 lightheads) we are trying to use the momentary button to kill the rear 2 lightheads, but allow the circuit to reset when turning the upfitter off and then back on allowing power (or ground) to the rear lightheads allowing them to function again. The end user is wanting to make sure the rear lightheads will come back on through the upfitter switch 1 when turning the switch to ON. The end user works from the rear of the truck onsite and the rear 2 LED lightheads are at eye level. He is hoping to use the momentary switch to kill those 2 rear lightheads when working from the rear, allowing the other LED's (beacon and front 2 LED lightheads) to continue working, but when he gets back in the cab and turns the beacon and lightheads off killing all power to those heads, but allows the circuit to reset when turning upfitter switch 1 back on. I am having a hard time wrapping my head around this. I am close to figuring it out, but just can't get it sorted. Can this be done?
This is really good type of replays thats used for many safety circuits when something wrong done for mechanical machine the fault make the latch rellay energized then you cant reset the fault to run it again by using the reset button only .you should Fixed the mechanical damage thats connected to latch rellay directly on hardwire first
Do these exist for contractors for very high currents (in excess of 1000A?) For the purpose of a motor controller or small EV with a DC commutated motor to allow polarity change of field, eliminating the need for a large H bridge switch? I considered using some cheap car solenoids but having 2 of 4 of them engaged continuously would be pretty wasteful and they might overheat
Anyone know how a pulse latching water solenoid works for a irrigation system. I’m just a plumber and how they stay open with no power feeding the solenoid seems like sorcery to me
Seems better to just feed the coil through a N.O. contact in the relay. After energized it will stay latched. Reset button kills power to coil. Simple...
This is all well and good but slightly wrong. Most latching relays combine power sources and use a latch/reset circuit cut the power. Also in the case of elevators... its all PLC/PAC driven now
Otis elevators used latching (set/reset) relays for 50 odd year for the car/landing calls on their floor selector before going transistor/electronic. They would past voltage thought the coil in one direction to magnetise the armature set the relay which would keep the contacts made then pass the voltage the reverse way to demagnetize the armature to reset it.
@@EngineeringMindset I didn't see the size of the video from the notification.. I seen it was from you guys and immediate hit watch. I quite like the mini topic.. I am hoping it's more like a teaser for things to come?
Bad explanation I think. Whats making sure the contact is tight against the contact point, and what releasing the power from the elevator coil after coming down??
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Now I can see that besides all electrical components , mechanical mechanisms help them too much
900 iq knowledge thanks
I’m an elevator tech and and instructor at our elevator apprenticeship education program. I teach solid state and I use your videos to help the students identify what we’re discussing. This video will be incredible helpful for myself and my students. Thank you.
Great to hear and glad the content is useful. Did you checkout out solid state relay video? ua-cam.com/video/3AVHqV_xASQ/v-deo.html
I want to get into the elevator/escalator industry.. how do I do so?
@@starmc26 do you live in the states or Canada?
@@travarious2810 the United States
@@starmc26 ok. Look up International Union of Elevator Constructors local offices in your state. Give the local union hall a call to see when their next hiring event is. You’ll need to sign up, take an aptitude test, and be interviewed. Unless you’re a veteran, you’ll be placed at the top of the hiring list.
You explain it so that is so easy to understand. gonna binge watch your videos tonight
This is amazing i am on a project that involves latching relay and I was all over the internet trying to understand how it work it was all in vain, all I ended up getting was pictures of MCB( miniature circuit breaker) I was giving up! until this video showed up on my notification and am forever grateful.
Glad I could help
bonface muthuri it's not so complicated, i hope you ever use any D.O.L circuit both are same
I hope you know about jog or inching.
Seen our new incredibly detailed MCB video? link: ua-cam.com/video/gqEu9t8HwW0/v-deo.html
Seen our new incredibly detailed MCB video? link: ua-cam.com/video/gqEu9t8HwW0/v-deo.html
I’m an electronics engineer and I love all your videos . You’re better than my professors do
So clear. I didn't even know these things existed. The graphics and explanation are great!
I think you should also know about jog or D.O.L circuit.
This helps allot I am working on a project for school where this is perfect for
Those latching relays are widely used for lighting applications where the lights have to remain on or off after pressing a 3-position switch (on/off/stand-by)
thanks a lot the concept of latching is cleared to my your video is very helpful
I want to say thank you.Great videos.
Finally a great video on this. Sorry in advance for asking a stupid question but in the above example, what would it be called? spst,dpdt etc?
Huh this is actually simpler than I thought. When I saw the title I had in mind a relay with multiple contacts and one set being used to latch the coil.
Now i know it! Cool! Thanks!
Thank you so much for sharing
Superb videos chap. I would like to make an alarm for my garage is this something that you could cover please Thank you.
Thank you!
You're welcome!
Thankyou so much for this video
Nice explanation of how a latching relay is used, but lifts (elevators) don't actually use these type of relays, even on old relay logic controllers. Normal multi-contact relays are used with one of the contacts used to maintain the relay feed to itself until a floor selector system tells it to drop out. Using the latching relay system you describe would be prohibitively expensive and unecessarily complicated to design into the operating system.
Otis elevators use a set/reset relay for 50 odd years by sending voltage one way through the coil making the armature temporary magnetised which keeped the contacts made.
To reset the relay voltage was passed the reverse way.
This set up was mainly used on their car/landing call relays on the floor selector.
Not being familiar with every lift control system, I stand corrected if Otis have used this type of relay in some of their equipment. However, I would still suggest that the vast majority of lift control systems do not use this type of relay in their circuits as their complicated nature is more readily served by standard relay and contactor arrangements.
I was, before retirement, an electrical engineer for a British lift company designing lift control systems. Obviously, in the last thirty years or so, electronics and microprocessor controls have removed the need for these types of electro-mechanical control systems.
Mark Doble:
Please find something else to do. He made an illustration that all of us could understand. For we’ve all used elevators
@@markdoble736 Does it really matter as it was just used as an example of how you "could" using a latching relay to hold up a landing call acceptance lamp on an elevator.
I actually complimented the explanation of how a latching relay works, I was simply pointing out that most lift control systems don't really use them. I'm sorry if this upset anyone, I hadn't realised how sensitive some viewers could be when being offered some useful information.
thank you so much team
awesome explanation!!!
I am working on a 2021 Ford F350 w/ factory upfitter switches. We are trying to use upfitter switch 1 as the power source for an LED beacon and 4 LED lightheads. We are trying to wire in a latching relay to cut power (or ground) to the rear 2 lighthead by wiring in a momentary button. When upfitter switch 1 is powered and all the lights are functioning (beacon and 4 lightheads) we are trying to use the momentary button to kill the rear 2 lightheads, but allow the circuit to reset when turning the upfitter off and then back on allowing power (or ground) to the rear lightheads allowing them to function again. The end user is wanting to make sure the rear lightheads will come back on through the upfitter switch 1 when turning the switch to ON. The end user works from the rear of the truck onsite and the rear 2 LED lightheads are at eye level. He is hoping to use the momentary switch to kill those 2 rear lightheads when working from the rear, allowing the other LED's (beacon and front 2 LED lightheads) to continue working, but when he gets back in the cab and turns the beacon and lightheads off killing all power to those heads, but allows the circuit to reset when turning upfitter switch 1 back on. I am having a hard time wrapping my head around this. I am close to figuring it out, but just can't get it sorted. Can this be done?
This is really good type of replays thats used for many safety circuits when something wrong done for mechanical machine the fault make the latch rellay energized then you cant reset the fault to run it again by using the reset button only .you should Fixed the mechanical damage thats connected to latch rellay directly on hardwire first
See our new video on how to build mechanical versions of electronic circuits? Watch here: ua-cam.com/video/Zv9Q7ih48Uc/v-deo.html
Very good want more videos of this kind
Thank you💚💐
Welcome 😊
Thank you شكرا لك
Thank you for good information
Welcome
I like this video
It's very educative
Always good vídeo
Glad you think so!
Hooray this vid shows actual electric flow
Thanks
One day if I become a engineer, That is because of your channel and real engineering and lesics
We also use latching relays for alternate operation of a two motors.
Thanks!
Thank you, Qill AQ
Do these exist for contractors for very high currents (in excess of 1000A?) For the purpose of a motor controller or small EV with a DC commutated motor to allow polarity change of field, eliminating the need for a large H bridge switch? I considered using some cheap car solenoids but having 2 of 4 of them engaged continuously would be pretty wasteful and they might overheat
Nice video
Thanks you
Good content.
Thanks for this
No problem
Hi, what model of relay uses this configuration? Thanks
👌👌👌
#Thank you#
Thank you 😀
No problem
Plz make a video about Operational amplifier
Yea an op-amp video would be great 👍
Thank youuuuuui
Thanks 👍🇬🇧
Our pleasure!
Is this how the latching contractor in DOL starter works please?
Thnks a lot
Happy to help
excuse me sir there are any differences between latch relay and impulse relay?
How about a video to connect smart wifi relay?
You need to teach everyone to use a flyback diode! Its killed some my compoment,
(it killed my transistor bc557)
Make vedio on latch relay connection my2k
Anyone know how a pulse latching water solenoid works for a irrigation system. I’m just a plumber and how they stay open with no power feeding the solenoid seems like sorcery to me
I've never heard of those, but my guess is that "open" is simply the unpowered default position?
Wow
Seems better to just feed the coil through a N.O. contact in the relay. After energized it will stay latched. Reset button kills power to coil. Simple...
Agreed, this seemed like an odd way to describe a latching relay with an odd application.
It has to be able to switch tho ..
You would need two relays to make that work. The latching relay is essentially two relays in one because it has two coils.
Latching relays are found in your car's power window circuit enabling one touch down (and / or up).
This is all well and good but slightly wrong. Most latching relays combine power sources and use a latch/reset circuit cut the power. Also in the case of elevators... its all PLC/PAC driven now
Otis elevators used latching (set/reset) relays for 50 odd year for the car/landing calls on their floor selector before going transistor/electronic.
They would past voltage thought the coil in one direction to magnetise the armature set the relay which would keep the contacts made then pass the voltage the reverse way to demagnetize the armature to reset it.
Brother your using editor
Which the NO or NC?
👍👍
👍
Why does current flow that way?
See this ua-cam.com/video/MUh_dOcqgVw/v-deo.html
Also check our how batteries work video
is this relay? looks more like a solenoid...latching solenoid. anbyway nic e video...i was not looking for this...
👍🇧🇷🙏🏼👏👀
Ladrão de Joules
🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🥺🥺🥺🥺
🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷
🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼🙏🏼
🥺🥺🥺🥺🥺🥺🥺🥺🥺
👀👀👀👀👀👀👀👀👀
I thought this was actually going to progress onto direct online starters
Not this one, just a quick 2min video
@@EngineeringMindset I didn't see the size of the video from the notification.. I seen it was from you guys and immediate hit watch.
I quite like the mini topic.. I am hoping it's more like a teaser for things to come?
@@EngineeringMindset 🙋🏻♂️ Yeah, I also like these short explainers! Perfect for "break time!" Look forward to more! 👍🏼😎✌🏼
Bad explanation I think. Whats making sure the contact is tight against the contact point, and what releasing the power from the elevator coil after coming down??
See the bottom right corner
@@EngineeringMindset bottom right hand corner of what and when?
Who have this in french plz
Please see our French channel
why diagrematic reversal ... chinese