Natural Gas 240 volt systems

Unknown

some experince with 230/240 volt systems on gas. In particular with 240 volts Hot Surface Igniters. As Dan mentioned in one of his posts to bring everyone to civility, what about systems in New Zealand. I know from some e-mail communication with Corran Vincent that they have some 230 volt stuff. I would love to hear about those systems. I also know they have some different equipmnent in New Zealand and other places.

David_5

I've never seen any but,

Why would you expect it to be different?

David

Unknown

We used to have

208/220/230 volt systems on gas industrial burners. They were banned back in the 1970's due to incidents of one leg having a fuse blown and the other leg still powered and this caused some gas valves to be energized causing some explosions. All gas systems have been pretty much 120 volt and 24 volt ever since.

I have recently started to see some HSI Igniters listed for 230 volts. Just wondered what systems they are being used on? I have not yet seen any. Corran Vincent who posts here mentioned some 230 volt systems in New Zealand, I wonder if they are used in Europe?

Arthur

230volts

NZ uses a 3 wire system where the phase is red or brown,the neutral is either blue or black with earth green or green/yellow.
The neutral is linked the earth busbar in the switchboard. Ant at 50hz the phase sine wave is postive/negative @50hz.
ALL apliance MUST by regs be earthed unless they are double insulated.
Not sure how your system works but I presume it's simalar except for voltage and Fequency ???
Not sure how you have fuses on each leg. we only fuse the phase as a rule and the neutral is at ground potenial any way, On 3 phase the potenial between any 2 phases is 440volt and any phase and earth is 230v. Are you sort of using a 2 phase to get the 230v ?. Do you have 3 phase?
3 phase is mainly used on larger motors as they have a more balanced current use, Although I have a couple 3 phase 1hp motors lying around. But under say 1-1.5 hp motors are usualy 1 phase.
Europe seems to use the same voltage and hz as we do. But whether there is difference in how it's done I don't know.
I havn't had much experience with HSI except on a couple of
Raypac's I had to work on.
Had an interesting day today went a seminar on Kagla and Algas Lpg Vaporisers. Saw the Zimmer and power XP (here was me thinking XP was the latest mickeysoft operating system) lol.
Do you guys use many vaporisers over there?
Cheers

Jimmy Gillies

240V AC

Hi Tim.
Most of our gas boilers etc are 240V here in the UK & I think it's the same in other parts of Europe.
With water, gas & 240V it's not a very safe mix, so most of the guys I know & employ have lots of training - by law.
I hope this gives you some insight into systems here in the UK.
Regards.
Jimmy Gillies
Scotland.

Unknown

LP Gas Vaporizers

here in US mostly LP gas contractors would be working on vaporizers. For those who are not familiar with Vaporizers they are used to change the liquid LP to a gas for use in equipment. It is often the case when extreme low temps are the norm for them to be used. It is also sometimes necessary with large demand systems.

I am assuming that because you New Zealanders and Guys from Europe are using 230 volts that it includes relays, limits and gas Valves? I know Europe is mostly boilers but what type of systems do you have in New Zealand, any steam?

Arthur

Steam

Here in NZ, steam is mostly used for process work, Only on 2 occassions have I seen it used for heating, One was when I first started in the trade a big department store in Invercargill had a couple steam cast iron boilers I think they were either Ideal Brittanica or maybe Crane Whitehalls. They had this great steam drum on top of them, The steam was used to heat the department store. The other occassion was a sawmill were the excess steam from the kiln boiler, which burnt waste wood offcuts, to heat the mill office building, I had to repipe the building crawling around under the building.
Before joining the heating trade I had experience firing by shovel a steam powered dredge, A scotch 3 pass marine boiler on coal powering a couple tripe expansion engines, She was a nice old vessell made in 1903. Then I worked at a freezing works for a while were we had 3 boilers on coal with underfeed stokers and 2 on bunker oil.
But I got tired of shift work and started working for a heating firm, and 40yrs later I'm still going.
I think I must be mad as I'm sure there are easier ways of putting bread on the table.lol.
Most schools and government buildings used to be low pressure hot water systems.

jim lockard

Cheers

Corran--For the most part we work the same as you differant voltage and cycles (HZ) 120/240 volt 60 HZ single phase systems in the home with an unfused center point netrual/earth at entry or as we say point of service.
Three phase is reserved for more commerical locations with 120 phase to earth/208 phase to phase. Our highest indoor voltage is 277/480 three phase which is used in larger building and heavy equipment. Question when you say 2 phase are you refering to a phase angle 90 degrees apart such as 2 phase 4 or 5 wire with four unearthed conductors or is it all 3 phase 120 phase angles with wye or delta connections. Cheers J.Lockard

jim sokolovic

Norton 230 volt ignitors...

When Norton first developed a 230 volt ignitor, they used the same resistence tip material (ceramic-intermettalic) as the 120 volt model, but doubled the length of the tip. So instead of a 1.25" tip, it was 2.5" long. You had to be careful not to sneaze when you held it, it was so fragil! They have since developed a different composition tip that is shorter and seems to hold up O.K. in some European locations where the voltage is said to vary quite a bit outside the normal specifications.