Morning glory

[pennychew]

Stayed at a hotel in Dudley last night and opened the curtains to this view this morning, i was quite chuffed then i realised thats probably a bit sad

 

[tazz]

Ohh dear.....I`m back in Newcastle next week...and I hope my hotel view is more interesting...lol

 

[pennychew]

Haha! It was the last thing I expected to see though to be fair, when are you up here?

 

[tazz]

Hopefully next week, were getting alot of work from the hotels up there, and all are recommendations

 

[pennychew]

Not the village hotel is it?

 

[tazz]

No its the Grainger Hotel

 

[pennychew]

Only a couple of mile from mine again, give me a shout if you fancy a pint as I still owe you one!

 

[tazz]

Sounds good, Have told Trev, just need exact day now.......hows the Gent system we did, still working..?

 

[pennychew]

Yeah it's still spot on, good old maplins eh!

 

[tazz]

Well did the job, the other firms were on the right track, with the psu, but I think the 50mA Gent output still threw them...lol

 

[pennychew]

Yup! I was thinking of that job the other day actually, there are a couple of one zone panels in the workshop at college and we've been tasked with installing them in the bays. Loads of bits were coming back to me like the e.o.l resistors and stuff

 

[tazz]

I think Paul wants to cover this later in his training, its a very simple voltage monitoring circuit, but once you see how it works, you will straight away understand, and will make fault finding easier

 

[Bobster]

Whats sad is being able to glance at the insulators on that installation and be able to tell you primary and secondary voltages!

 

[pennychew]

Go on then, I did wonder! my guess is 33k down to 11k but that's just a total guess

 

[pennychew]

It's probably much higher thinking about it more

 

[Simonslimline]

Go on then, I did wonder! my guess is 33k down to 11k but that's just a total guess

I am guessing it comes in at 132KV?

 

[Bobster]

Those TX's sitting outside are 33kv/11kv. 132KV insulators are usually around 5' long and a little wider. Never got up close to a 440KV system I'm not authorized to work above 33KV anyway.

Inside the little building probably a couple of 11Kv to 433v transformers. Along with a small 11KV distribution system feeding other Tx's around where you are.

 

[pennychew]

I am guessing it comes in at 132KV?

Sounds more likely

 

[Simonslimline]

Those TX's sitting outside are 33kv/11kv. 132KV insulators are usually around 5' long and a little wider. Never got up close to a 440KV system I'm not authorized to work above 33KV anyway.

Inside the little building probably a couple of 11Kv to 433v transformers. Along with a small 11KV distribution system feeding other Tx's around where you are.

Interesting stuff IMO.

I was guessing as it looks similar to one next to a friends house of mine. This has 132KV Danger signs on the side wall.

Out of interest, what vector group would the 33KV/11KV Tx be?

The 11KV to 433V are most likely Dyn11 are they not?

 

[Bobster]

Even the 33/11KV transformers will probably be DYn11.

The 132/33Kv transformers I've gotten close to have all been a YNd11 vector group. Although I couldn't say if this was a common thing.

Do you cover vector groups in college?

 

[Simonslimline]

Even the 33/11KV transformers will probably be DYn11.

The 132/33Kv transformers I've gotten close to have all been a YNd1 vector group. Although I couldn't say if this was a common thing.

Do you cover vector groups in college?

Ok thanks.

No we did not cover this at all. Im guessing it's more like ONC HNC HND kind of stuff?

I did some reading about it a while back and found it interesting.

 

[pennychew]

Even the 33/11KV transformers will probably be DYn11.

The 132/33Kv transformers I've gotten close to have all been a YNd11 vector group. Although I couldn't say if this was a common thing.

Do you cover vector groups in college?

We haven't covered vector groups at all yet

 

[Bobster]

You may not do, I only covered it during my apprenticeship properly when I started my HND.

I had been taught the concept of what they are at the training center, although it wasn't in the curriculum. (In short Star/Delta Primary or Secondary and what phase angle displacement there is).

I only learnt about how to utilize different setups from mentors at where I served my time. One use is canceling 3rd/5th harmonics resonating through a system.

It's quite an advanced subject really, if people are interested just ask away. I can see it going over peoples head quite quickly as I sometimes find subjects like this difficult to put in layman's terms.

 

[Guest77]

Stayed at a hotel in Dudley last night and opened the curtains to this view this morning, i was quite chuffed then i realised thats probably a bit sad

View attachment 27982
View attachment 27983
View attachment 27984

My God, you need a woman and urgently.

 

[Simonslimline]

You may not do, I only covered it during my apprenticeship properly when I started my HND.

I had been taught the concept of what they are at the training center, although it wasn't in the curriculum. (In short Star/Delta Primary or Secondary and what phase angle displacement there is).

I only learnt about how to utilize different setups from mentors at where I served my time. One use is canceling 3rd/5th harmonics resonating through a system.

It's quite an advanced subject really, if people are interested just ask away. I can see it going over peoples head quite quickly as I sometimes find subjects like this difficult to put in layman's terms.

For example a Dyn11 Tx would be....

D = High voltage Delta
yn = low voltage star with neutral.
11 = Low voltage windings are leading the primary by 30 degrees.

I think this is correct.

I would be interested to know why different vector groups are used in certain voltages/winding configurations/situations.

 

[Bobster]

For example a Dyn11 Tx would be....

D = High voltage Delta
yn = low voltage star with neutral.
11 = Low voltage windings are leading the primary by 30 degrees.

Correct, think of the number as a clock face 11 is 30deg lead 10 is 60 etc...
I think this is correct.

I would be interested to know why different vector groups are used in certain voltages/winding configurations/situations.

https://electricalnotes.wordpress.com/2012/05/23/vector-group-of-transformer/

This is fairly simplified.

 

[pennychew]

My God, you need a woman and urgently.

Ive had the same one for 12 years, probably why i enjoy working away!

 

[Paul.M]

I think Paul wants to cover this later in his training, its a very simple voltage monitoring circuit, but once you see how it works, you will straight away understand, and will make fault finding easier

Certainly something I'm interested in, it may lead to other sections of the trade. Look at this thread for example it has gone from 50mA resistors to 33KVA transformers! Love it!

 

[pennychew]

I think Paul wants to cover this later in his training, its a very simple voltage monitoring circuit, but once you see how it works, you will straight away understand, and will make fault finding easier

Sorry tazz I totally missed this post and only saw it when Paul quoted you!