Waching daily Dec 31 2016

Different Types of Relay.

Depending on the operating principle and structural features relays are of different types such

as electromagnetic relays, thermal relays, power varied relays, multi-dimensional relays,

and so on, with varied ratings, sizes and applications.

This video main aim is to give a brief idea about various relays that are employed for

a wide variety of control applications.

Some of these relays are described this video.

Electromagnetic Relays.

These relays are constructed with electrical, mechanical and magnetic components, and have

operating coil and mechanical contacts.

Therefore, when the coil gets activated by a supply system, these mechanical contacts

gets opened or closed.

DC and AC Relays.

Both AC and DC relays work on the same principle as electromagnetic induction, but the construction

is somewhat differentiated and also depends on the application for which these relays

are selected.

DC relays are employed with a freewheeling diode to de-energize the coil, and the AC

relays uses laminated cores to prevent eddy current losses.

Attraction Type Electromagnetic Relays.

These relays can work with both AC and DC supply and attract a metal bar or a piece

of metal when power is supplied to the coil.

This can be a plunger being drawn towards the solenoid or an armature being attracted

towards the poles of an electromagnet as shown in the figure.

These relays don't have any time delays so these are used for instantaneous operation.

Induction Type Relays.

These are used as protective relays in AC systems alone and are usable with DC systems.

The actuating force for contacts movement is developed by a moving conductor that may

be a disc or a cup, through the interaction of electromagnetic fluxes due to fault currents.

These are of several types like shaded pole, watt-hour and induction cup structures and

are mostly used as directional relays in power-system protection and also for high-speed switching

operation applications.

Magnetic Latching Relays.

These relays use permanent magnet or parts with a high remittance to remain the armature

at the same point as the coil is electrified when the coil power source is taken away.

Solid State Relays.

Solid State uses solid state components to perform the switching operation without moving

any parts.

Since the control energy required is much lower compared with the output power to be

controlled by this relay that results the power gain higher when compared to the electromagnetic

relays.

These are of different types: reed relay coupled SSR, transformer coupled SSR, photo-coupled

SSR, and so on.

The above figure shows a photo coupled SSR where the control signal is applied by LED

and it is detected by a photo-sensitive semiconductor device.

The output from this photo detector is used to trigger the gate of TRIAC or SCR that switches

the load.

Hybrid Relays.

These relays are composed of electromagnetic relays and electronic components.

Usually, the input part contains the electronic circuitry that performs rectification and

the other control functions, and the output part include electromagnetic relay.

Thermal Relay.

These relays are based on the effects of heat, which means - the rise in the ambient temperature

from the limit, directs the contacts to switch from one position to other.

These are mainly used in motor protection and consist of bimetallic elements like temperature

sensors as well as control elements.

Thermal overload relays are the best examples of these relays.

Reed Relay.

Reed Relays consist of a pair of magnetic strips (also called as reed) that is sealed

within a glass tube.

This reed acts as both an armature and a contact blade.

The magnetic field applied to the coil is wrapped around this tube that makes these

reeds move so that switching operation is performed.

Relays are also available with different pin configurations like 3 pin, 4 pin and 5 pin

relays.

The ways in which these relays are operated is shown in the below figure.

Switching contacts can be SPST, SPDT, DPST and DPDT types.

Some of the relays are normally open (NO) type and the other are normally closed (NC)

types.

Thanks for watching this video.

More about information of about relay, check out my video How a Relay Works?

please subscribe my channel learning Engineering.

For more infomation >> Types of Relay - Different Types of Relay - Classification of Relays - Duration: 4:46.

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TI Update 12.28.16 - Duration: 30:40.

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ВСПЫШ и ЧУДО МАШИНКИ Новая серия на русском от Tyomka TV ВСПЫШ Гонки Мультик про машинки для детей - Duration: 2:25.

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SAYKOJI - LIFESAVER - Duration: 3:55.

LOST AND HELPLESS ALONE IN THE DARKNESS

GOT NOWHERE TO GO UNTIL YOU CAME ALONG

GELAP DAN SEPI TERHILANG SENDIRI KAU HADIR TUMBUHKAN HARAPAN LAGI

YOU'RE MY POWER, YOU'RE MY HOPE

YOU'RE MY LIGHT, SHINING BRIGHT

KAU KUATKU, HARAPANKU, PENUNTUN DAN CAHAYA

WE GO BETTER TOGETHER, LIKE YOU AND I FOREVER

IT'S LIKE WE'RE ONE WITH THE FORCE

LOVE IS THE ONLY ONE SOURCE

YOU CAME ALONG, YOU BRING THE LIGHT

KEEP ME IN LINE IN MY HEAD, YOU SO TIGHT

JUST LIKE A JEDI TRICKIN' ON MY MIND

BUT YOU ARE SINCERE HA, YOU MAKE ME FEEL FINE

AND I'M THANKFUL FOR WHAT YOU HAVE DONE

YOU GO ALL THE WAY

KAU TERANGKU DALAM KEGELAPAN

LIGHT UP SHOW THE WAY

YOU'RE A HERO FOR ME

YOU HAVE SET MY SOUL FREE

YOU ARE MY DESTINY

FOREVER, MY LIFESAVER

TURN IT ON LIKE A LIGHTSABER

TURN IT ON LIKE A LIGHTSABER

HAMPA SEPERTI DI ANGKASA

TANPAMU AKU TAK KUASA

BAGIKU KAU PENYAMBUNG ASA

TAK UBAHNYA PELITA DI SETIAP MASA

RASA SENANG DAN TENANG

SURAM SILAM KUKENANG

TAKKAN TERPUTUS BENANG

KASIH SEJATI KUDAKI KURENANG

AND I'M THANKFUL FOR WHAT YOU HAVE DONE

YOU GO ALL THE WAY

KAU TERANGKU DALAM KEGELAPAN

LIGHT UP SHOW THE WAY

YOU'RE A HERO FOR ME

YOU HAVE SET MY SOUL FREE

YOU ARE MY DESTINY

FOREVER MY LIFESAVER

TURN IT ON LIKE A LIGHTSABER

TURN IT ON LIKE A LIGHTSABER

TURN IT ON LIKE A LIGHTSABER

For more infomation >> SAYKOJI - LIFESAVER - Duration: 3:55.

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Laila Main Laila Dance | Raees | Bollywood Choreography | #DanceLikeLaila - Duration: 1:22.

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Kim Ty jesteś? - Duration: 3:15.

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[Phim Sửu Nhi] Phần 2 | Tập 3 | Phim Học Sinh Cấp 3 - GROUP CAST [OFFICIAL] - Duration: 13:20.

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Speed Racer 48% | Geomerty dash - Duration: 0:47.

pretty tide ship

fast cube

really fast balls

whoooooooooooooooooooooooooooooo

wait why is it going in slow motion

WAIT WHAT

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I ate teppan plate okonomiyaki and yaki soba !! - Duration: 1:56.

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The Metropolitan Museum's English Gallery - Duration: 5:08.

There's an astonishing amount of racy

stuff in art in a big museum like the

Metropolitan you can find almost the

whole history of human sexuality

included in the artworks and that's

what our tours are about at Shady Ladies

Tours we show you the racy side of art

in the museum from the ancient Greeks

up to the modern collection there is

even racy stuff in parts of the museum

where you really wouldn't expect it to

A great example is the Met's gallery

of English 18th century paintings I

think if you just look at it without

knowing anything you would imagine that

it's a gallery of portraits of dukes

and duchesses all of whom came from

aristocratic families and had perfect

spotless lives and that is in fact not

true at all I think that's what the

portrait painters want you to think

because these are very honorific

portraits of people who were important

but it doesn't mean they didn't have

scandalous backgrounds and I'll just tell

you that the a little tiny bit about four

of them then you can come on our tour

some time to find out a lot more fun

gallery as you walk in on the left

there's a very big portrait very grand

of a woman in a vast gold dress again

you might think she was the Duchess but

she's not at all

this is one of the most prominent

courtesans of 18th century London a

woman named Grace Dalrymple Elliot who

was the lover of a whole string of

aristocrats including for instance

the Prince of Wales the future George

the fourth she actually might have had an

illegitimate child by George the fourth

she also lived in France for about a

decade and was the lover of a cousin

Louis the 16th the Duc d' OrlŽans who was

a very interesting person in history

because he became a

revolutionary if you look right across

the gallery from her you see a

portrait of someone who certainly is an

illegitimate royal child this is Charles

Beauclerk the Duke of St. Albans she had a long

string of titles all of which were given

to him by his father King Charles the

second but he was in fact an

illegitimate child by one of Charles's

innumerable mistresses the actress Nell Gwyn

Gwyn is probably the most

fun of all royal mistresses in history

but there's not that much really to say

about her son except that he had a

lot of children I know when people look at

him they think he's kind of metrosexual in fact

was apparently sexually very active

he had a lot of children and is the ancestor

of an enormous number of great British

aristocrats in history if you look down

at the end of the gallery

there is a very dramatic portrait of a woman

with her hair flying in the wind this is an

actress during a play her name is Elizabeth

Ferran she was in fact the most

prominent comic actress of the century in

England she wasn't a courtesan but

she was an actress with an aristocratic

patron which in eighteenth-century terms

is not very different from a courtesan

that she had in the end stroke of luck

which Grace Dalrymple didn't have which

is that yourher aristocratic patron's wife

died and he married her which

aristocrats could do in the 18th

century some people married their

mistresses I think you had to be important

enough to ride out the scandal but

apparently he felt he was and

she became the Countess of Derby just

across from her

there's another wonderful portrait of

the young officer I think I've asked

many many people what they make of his

attitude as he looks out at you poutily

some people think he's just arrogant

most I think see him instead see his

arrogance as having a kind of sexy edge

as if he were standing there saying

something like babe I know you want me

I don't in fact know anything scandalous

about him but there is something

interesting about him which is that his

sister was good friends with Jane Austen

so looking at this portrait I always

wonder if he might be the model for Willoughby one of the

great cads of English literature

anyway

there is racy stuff in lots of the

museum's galleries and you should come on

our tour and you'll find out a lot more

For more infomation >> The Metropolitan Museum's English Gallery - Duration: 5:08.

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ЩЕНЯЧИЙ ПАТРУЛЬ Новогодний подарок СКАЙ Развивающие мультики для детей Подарок Новый год для малыщей - Duration: 2:10.

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Shiva Untold - Love and Loss of Sati - Sadhguru - Duration: 3:01.

(Sadhguru): Shiva's love for Sati was like I was just now telling,

when we were in the Kailash trip

people became weepy about what they missed.

They didn't miss anything,

but they felt they missed.

So it's one of those moments when you yield.

So Shiva's love for Sati is just like that –

it's one of those moments where he gave in

to the ways of emotion and to the ways of life.

That was not an eventual happening in his life,

that was just a small happening in his life.

It is his silence which is of utmost significance to us.

It is his silence which is of greatest value to us,

not his romance,

not his marriage,

not his wife's death –

not these things.

But how to talk about his silence? (Laughs)

There is no way to talk about his silence.

now that you have brought up the question. (Laughs)

Yes,

he went through all the throes of

romance and the death and the grief and the works.

But the moment he set it down, he simply sat there still, unmoved,

as if nothing had ever happened to him… nothing...

nothing had happened to him at all.

And in fact nothing had happened to him,

and nothing happens to anybody for that matter.

It is just that because

our psychological and emotional structures are such that

it is designed for us to enjoy the juice of life.

But unfortunately most people don't drink the juice of life,

they drown in the juice of life.

So Shiva also allowed himself that luxury from some moment.

When he thought it's enough,

he came out of it and sat there completely conscious

and in a different state.

So don't ever think that was the eventual happening.

That was just a small happening in his life and that was fine.

That made him kind of more human friendly

because people could relate to him

because he also grieved. (Laughs)

That gives some joy to all the people who are in different levels of misery,

that Shiva also suffered for a certain period of time.

But you need to understand it's just one of those moments

when he has given into the process of life.

But the moment he wants to stop it, he stops it immediately

and sits there untouched by any of these things.