General > General Technical Chat
Fix the voltage campaign (Australia)
sibeen:
--- Quote from: james_s on January 17, 2021, 05:34:57 am ---What is a multiple earth neutral? That's not a term I'm familiar with, if we have it we probably call it something else here.
--- End quote ---
At the entrance to each house or building, at the sites incoming switchboard a connection is intentionally made between the Earth and the Neutral. In a suburban setting a pole transformer feeds multiple households and at each of these the Earth - Neutral bond is made, so for each transformer there are multiple earth to neutral connections made.
Even if a large building has a dedicated transformer where only one earth to neutral connection is made we still call it the M.E.N link
sibeen:
--- Quote from: VK3DRB on January 17, 2021, 10:06:31 am ---
--- Quote from: james_s on December 28, 2020, 08:42:33 am ---Is it? I thought the standard was 240V?
--- End quote ---
It has been 230V for almost 2 decades. And AM radio stations are allocated 9kHz apart, not 10kHz ;).
Thinking our mains is 240V is still common for some reason.
--- End quote ---
It is common for the very good reason that generally the voltage is 240 volts or quite close to it. The standard changed but the voltage didn't.
BradC:
--- Quote from: VK3DRB on January 17, 2021, 10:06:31 am ---It has been 230V for almost 2 decades.
--- End quote ---
Maybe for a VK3, but for a VK6 it has been 240 for decades, down from 250.
Thankfully we are still relatively isolated over here.
GlennSprigg:
--- Quote from: sibeen on January 17, 2021, 01:26:44 am ---
--- Quote from: GlennSprigg on January 12, 2021, 01:55:36 pm ---
We call this a M.E.N. link,
which means Mains-Earth-Neutral. Now partially answering your question....
--- End quote ---
Just a quick correction, MEN = Multiple Earth Neutral.
Every house has one so there is multiple earth neutral connections on the output of each transformer.
--- End quote ---
Oops!! You are right of course!! :phew: I must have had a Brain-Fart writing 'Mains' hahaha...
GlennSprigg:
--- Quote from: sibeen on January 17, 2021, 10:21:28 am ---
--- Quote from: VK3DRB on January 17, 2021, 10:06:31 am ---
--- Quote from: james_s on December 28, 2020, 08:42:33 am ---Is it? I thought the standard was 240V?
--- End quote ---
It has been 230V for almost 2 decades. And AM radio stations are allocated 9kHz apart, not 10kHz ;).
Thinking our mains is 240V is still common for some reason.
--- End quote ---
It is common for the very good reason that generally the voltage is 240 volts or quite close to it. The standard changed but the voltage didn't.
--- End quote ---
Yea, the AM stations 10-khz separation is not used here in Australia. We use 9-khz separation.
That's actually quite handy here, as multiples of 9 have an interesting outcome whereby all the digits add up to 9.
As such, you know you are on station with a digital tuner! For example....
1323-AM. 1 + 3 + 2 + 3 = 9 Ok.
954-AM. 9 + 5 + 4 = 18. 1 + 8 = 9 Ok. 8)
All half decent receivers here have a selectable 9 or 10 khz sep setting/switch.
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