Hello JW, glad you’re back on and hope you are well. These Timer Relays are often found in motor controls where the Star/Delta transition is controlled by the unit in conjunction with none timer relays. I have shown this video to some none electrically minded pump engineers that have found your video very informative.
Great to see you back on TH-cam. Hope you are well. I watched the electric storage heater video's. Really enjoyed looking at the old brochure segment.Many thanks for taking the time to film.
Nice! I'm going to use one of these to get a workshop light to illuminate when I'm shutting my electric roller shutter door and locking up for the night.
Brilliant video, I bought one of these relays a few months ago for a pump over run on the oil boiler. I never got round to fitting it but struggled with the paper instructions as you need a microscope to read them. I gave up mainly due to lack of patience and thought about bench testing, never found time. After watching this video I now realise how easy it is, thanks for that JW, you just got my enthusiasm back 😅
They are very useful items, I used to build simple door control panels with these many years ago when they were first introduced, by using different types you could set run times, delay times and stop and return delays.
Did something similar when I had an old gas back boiler. The pump used to turn off with the boiler and the heat exchanger would get really hot due to the absence of flow. A simple off delay timer of 20s on the pump sorted this.
Gotta love timer relays I built a control system for a plastic granule distribution system for an injection moulding factory with 20 moulders using relay logic with many of similar timer relays incorporated... Was much more reliable compared to the electronic system it replaced....only problem was it sounded like the proverbial room of monkeys on typewriters trying to write hamlet..
Man, I have such envy. DIN rails means you guys get the coolest stuff. In the US, we've got nothing to put in our electric panels beyond circuit breakers and surge suppressors. Even our RCBO's only come in one variety--5ma. Can't even get whole house varieties (TT systems dont seem to exist here).
I use one of these in my workshop to let the extractors over-run when I leave. Very usefully little devices. Only thing I am unsure about - is the make safe to use commercially (Chinesium and all that). I see RS do a very similar device but of course being good old RS it costs about 1000x more...? I can't find anything similar from a make I would "trust".
Europa have a selection of these things, www.europa-plc.com/relays including this one: cpc.farnell.com/europa-components/ecmft/multifunction-timer-12-240v-ac/dp/MC02811 very likely made in the same factory as the GRT8.
I wired one of these as a pump overrun (function E), but does not switch off pump in heating only, because S input never goes off. I suspect it is the valve 50v ish on orange that is still above the switching threshold. Any ideas on how to make this work properly? Thanks
An RC contact suppressor connected between S and neutral should reduce the voltage so that it works properly. Example: cpc.farnell.com/ampohm-wound-products/fe-sp-hdr23-100-100/contact-suppressor-0-1uf-100r/dp/FT00715 A similar problem can occur with some boilers, this can be fixed in the same way.
I had one of those, connected as you suggested and now works perfectly. Thank you so much for the lightening response and information. I find your channel extremely interesting; your explanations and examples always make the subject easy to understand.
its not just timer relays that are useful there are hundreds of combinations of relays out there for virtually everything you could want electrically wise. all they boil down to is switches normally open and normally closed and a bit of logic.
Hi John, I can think of some examples for the common functions, like the trailing edge for a bathroom light and a delayed fan, but could you give some more examples for the functions?
Use these for a 'watch dog' function when using a PLC, output a pulse from the PLC (best use transistor output), and into the 'signal in', then when the timer starts getting pulses, it turns the relay output on. If the pulses are lost (failed output, or wire off, or fuse blows), or go high or go low permanently, the relay drops out. Use this to kill an emergency stop circuit. You can achieve a SIL 3 (PLd) with this on a simple PLC.
Mode A (On Delay) might be useful for something like a refrigeration compressor, which should be left to settle for a while after being switched off before being switched back on again. (Check the compressor/fridge doesn't already have a power-on delay feature, though.) Another, fairly niche use case which came to my mind would be for a half-hour power-on delay for a VDSL broadband modem, to prevent Openreach's Dynamic Line Management system from reducing the broadband speed if you expect to see several short power interruptions in a fairly short space of time, such as when electrical work is being carried out, or if your toddler/fidgety ADHD teenager/energy-saving-obsessed housemate keeps flicking the switch on the wall socket. (A UPS might be a better solution, though.)
What is your opinion of those who do Test & Tag on appliances? What about those who go around tagging and what about those who do it at a single location for a company (such as a not-for-profit)?
Here in Italy that kind of relays are found in every apartment building to control the start lights (press a button and the light stays on for X minutes).
I am a manufacturing engineer, my knowledge of electrical engineering is very little. Your videos are great. Any advice on how to begin to ramp up my knowledge in a structured and logical way?
Hi John I rember when I started we worked in a bakery big ovens with wat was a contactor & my gaffer trying to explain & show me how it worked went right over my head he never really broke it down to how I could get my head round 🙄
Hi you need hair cut 💇♀️ as soon as Is only 10£ It will make you look more happy and serious I hope you not victim of this temper pry life Thanks ❤ Always respect I Not European We talk a bit more direct No bad intention At all ❤
The demonstration of all the functions - and why - was especially valuable.
Hello JW, glad you’re back on and hope you are well. These Timer Relays are often found in motor controls where the Star/Delta transition is controlled by the unit in conjunction with none timer relays.
I have shown this video to some none electrically minded pump engineers that have found your video very informative.
Really good to see you uploading more again, cheers!
Nice video John now everybody your homework is get as many of these connected together to make a half adder
Its good to see you. ! Thank you for returning to teach us something new. A blessed Advent.
Back in the day, I has a lot of fun finding ingenious ways to use these multi function relays in the commercial HVAC field.
Thanks for sharing!
Thank god these videos are back!
Great to see you back on TH-cam. Hope you are well. I watched the electric storage heater video's. Really enjoyed looking at the old brochure segment.Many thanks for taking the time to film.
Brilliant John especially the test lights connected so you can see what each mode does 👍👍
Very useful video. I've used one in the past for running a kitchen macerator. Good to know all the other functions.
Geya are a good company, I mailed them asking for a pdf version of an instruction manual and it was in my mailbox next day 👍
I used several of these recently to sequentially turn on multiple roof de-icing systems with self regulating heating tape. Worked perfectly.
Nice! I'm going to use one of these to get a workshop light to illuminate when I'm shutting my electric roller shutter door and locking up for the night.
Nice! all this in 1 relay Opposed to having a board that looks like an old relay Lift controller!
thanks for posting J.W! 😀👍
Brilliantly demonstrated as usual.
Brilliant video, I bought one of these relays a few months ago for a pump over run on the oil boiler. I never got round to fitting it but struggled with the paper instructions as you need a microscope to read them. I gave up mainly due to lack of patience and thought about bench testing, never found time. After watching this video I now realise how easy it is, thanks for that JW, you just got my enthusiasm back 😅
They are very useful items, I used to build simple door control panels with these many years ago when they were first introduced, by using different types you could set run times, delay times and stop and return delays.
I use these as the timer interface between mobilising equipment and station lights and garage roller doors on fire stations..
Did something similar when I had an old gas back boiler. The pump used to turn off with the boiler and the heat exchanger would get really hot due to the absence of flow.
A simple off delay timer of 20s on the pump sorted this.
Thanks John - great to see you back
Gotta love timer relays I built a control system for a plastic granule distribution system for an injection moulding factory with 20 moulders using relay logic with many of similar timer relays incorporated... Was much more reliable compared to the electronic system it replaced....only problem was it sounded like the proverbial room of monkeys on typewriters trying to write hamlet..
A very interesting video JW. I need to order one just to play around with.
Many thanks for these useful explanations!
Great content as always. Very educational! Thanks JW
Useful video John
i'd strongly urge comprehensive documentation when setting one of these up on a project.
Very well explained, thanks.
These are reasonably good for the money. I have a few, they will come in handy somewhere.
These are great. I used a few of them in my electric start generator project on my channel.
Man, I have such envy. DIN rails means you guys get the coolest stuff. In the US, we've got nothing to put in our electric panels beyond circuit breakers and surge suppressors. Even our RCBO's only come in one variety--5ma. Can't even get whole house varieties (TT systems dont seem to exist here).
I use one on my electric towel radiator, retractive switch outside the bathroom which turns the relay on for two hours.
My exact use too
I use one of these in my workshop to let the extractors over-run when I leave. Very usefully little devices. Only thing I am unsure about - is the make safe to use commercially (Chinesium and all that). I see RS do a very similar device but of course being good old RS it costs about 1000x more...? I can't find anything similar from a make I would "trust".
Europa have a selection of these things, www.europa-plc.com/relays
including this one: cpc.farnell.com/europa-components/ecmft/multifunction-timer-12-240v-ac/dp/MC02811
very likely made in the same factory as the GRT8.
Thank you John interesting and informative as ever .
Use these at work to time stopping 3phase blowers before reversing using 2 contactors and a DP relay
very good demo,lots of use
Use the finder units in control systems all the time.
I wired one of these as a pump overrun (function E), but does not switch off pump in heating only, because S input never goes off. I suspect it is the valve 50v ish on orange that is still above the switching threshold. Any ideas on how to make this work properly? Thanks
An RC contact suppressor connected between S and neutral should reduce the voltage so that it works properly. Example: cpc.farnell.com/ampohm-wound-products/fe-sp-hdr23-100-100/contact-suppressor-0-1uf-100r/dp/FT00715
A similar problem can occur with some boilers, this can be fixed in the same way.
I had one of those, connected as you suggested and now works perfectly. Thank you so much for the lightening response and information. I find your channel extremely interesting; your explanations and examples always make the subject easy to understand.
its not just timer relays that are useful there are hundreds of combinations of relays out there for virtually everything you could want electrically wise. all they boil down to is switches normally open and normally closed and a bit of logic.
Interesting, thanks for sharing 🙏
is it possible to show a wiring diagram for inside the switches,and the relay,just so i can get a better understanding,thanks, great video
Absolute expert you are .
Hi John, I can think of some examples for the common functions, like the trailing edge for a bathroom light and a delayed fan, but could you give some more examples for the functions?
I see you had the examples later in the video 🎉
Use these for a 'watch dog' function when using a PLC, output a pulse from the PLC (best use transistor output), and into the 'signal in', then when the timer starts getting pulses, it turns the relay output on.
If the pulses are lost (failed output, or wire off, or fuse blows), or go high or go low permanently, the relay drops out.
Use this to kill an emergency stop circuit.
You can achieve a SIL 3 (PLd) with this on a simple PLC.
Mode A (On Delay) might be useful for something like a refrigeration compressor, which should be left to settle for a while after being switched off before being switched back on again. (Check the compressor/fridge doesn't already have a power-on delay feature, though.)
Another, fairly niche use case which came to my mind would be for a half-hour power-on delay for a VDSL broadband modem, to prevent Openreach's Dynamic Line Management system from reducing the broadband speed if you expect to see several short power interruptions in a fairly short space of time, such as when electrical work is being carried out, or if your toddler/fidgety ADHD teenager/energy-saving-obsessed housemate keeps flicking the switch on the wall socket. (A UPS might be a better solution, though.)
fantastic, thanks john
What is your opinion of those who do Test & Tag on appliances?
What about those who go around tagging and what about those who do it at a single location for a company (such as a not-for-profit)?
Here in Italy that kind of relays are found in every apartment building to control the start lights (press a button and the light stays on for X minutes).
Very interesting.
I am a manufacturing engineer, my knowledge of electrical engineering is very little. Your videos are great. Any advice on how to begin to ramp up my knowledge in a structured and logical way?
John, would you be interested in selling your copy of the Machinery's Handbook?
Hi John I rember when I started we worked in a bakery big ovens with wat was a contactor & my gaffer trying to explain & show me how it worked went right over my head he never really broke it down to how I could get my head round 🙄
You have just said 'normally open and normally closed........ between which contacts?😮
This relay has a single changeover contact, 15&16 normally closed, 15&18 normally open.
15&18 were used in the demonstration.
I've been looking for a gadget that would control the battery charger for my e-bike... 2hr delay before charging and then 8hr ON... interesting
👌
👍⭐️🇬🇧
Hi you need hair cut 💇♀️ as soon as
Is only 10£
It will make you look more happy and serious
I hope you not victim of this temper pry life
Thanks
❤
Always respect
I
Not European
We talk a bit more direct
No bad intention
At all
❤
More like £20 where John lives. Why get a haircut when you could buy another relay!
These are best used with SSR ( solid stae relays ) but this is in panel wirng