Multifunction Timer Relay GRT8-M1 Demonstration

[@Seiskid]

The demonstration of all the functions - and why - was especially valuable.

[@d.wood72]

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.

[@warrengray610]

Nice video John now everybody your homework is get as many of these connected together to make a half adder

[@paulsto6516]

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!

[@JasperJanssen]

Really good to see you uploading more again, cheers!

[@blistiff]

Very useful video. I've used one in the past for running a kitchen macerator. Good to know all the other functions.

[@holmespianotuning]

Thank god these videos are back!

[@johnwaby4321]

Brilliant John especially the test lights connected so you can see what each mode does 👍👍

[@lewisbrand]

I used several of these recently to sequentially turn on multiple roof de-icing systems with self regulating heating tape. Worked perfectly.

[@barryromford3792]

I use these as the timer interface between mobilising equipment and station lights and garage roller doors on fire stations..

[@Chatterisdotbiz]

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 👍

[@davidchamberlain2162]

Brilliantly demonstrated as usual.

[@getyerspn]

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..

[@iian0]

Great to see you back on KZbin. 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.

[@GothGuy885]

Nice! all this in 1 relay Opposed to having a board that looks like an old relay Lift controller! thanks for posting J.W! 😀👍

[@TrippyElectronics-yn4fh]

These are great. I used a few of them in my electric start generator project on my channel.

[@andymartin86]

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.

[@waynecartwright-js8tw]

Use these at work to time stopping 3phase blowers before reversing using 2 contactors and a DP relay

[@paulmorrey4298]

Thanks John - great to see you back

[@tinytonymaloney7832]

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 😅

[@tonyweavers4292]

A very interesting video JW. I need to order one just to play around with.

[@fje1948]

Many thanks for these useful explanations!

[@ursusmaritimus7159]

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".

[@jwflame]

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.

[@suttoncoldfield9318]

i'd strongly urge comprehensive documentation when setting one of these up on a project.

[@007floppyboy]

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.

[@oscar4321234]

I use one on my electric towel radiator, retractive switch outside the bathroom which turns the relay on for two hours.

[@roberthawley3995]

My exact use too

[@montynorth3009]

Very well explained, thanks.

[@davenorth1265]

These are reasonably good for the money. I have a few, they will come in handy somewhere.

[@patrickwigmore3462]

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.)

[@timballam3675]

Use the finder units in control systems all the time.

[@rlfvacslakenheath]

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.

[@leehewitt9559]

Useful video John

[@benharris3387]

Great content as always. Very educational! Thanks JW

[@ronkyote2974]

great vid J, i used one of these diff manu...to solve a prob on switch from MC 2 Ac due to lame diesel motor

[@remog38]

Thank you John interesting and informative as ever .

[@dennisqwertyuiop]

very good demo,lots of use

[@POLITICAL-BIAS.]

Absolute expert you are .

[@alanporter2694]

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?

[@9111logic]

Interesting, thanks for sharing 🙏

[@alerighi]

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).

[@CoolJosh3k]

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)?

[@nocode1603]

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 🙄

[@ey327]

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?

[@ey327]

I see you had the examples later in the video 🎉

[@cliveramsbotty6077]

fantastic, thanks john

[@NivagSwerdna]

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

[@brianhewitt8618]

👌

[@zjzozn]

👍⭐️🇬🇧

[@Ibrahim-vt2tz]

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 ❤

[@octymocty132]

These are best used with SSR ( solid stae relays ) but this is in panel wirng