When will mechanical inside escape handles become mandatory
so car occupants can get out in an accident, when electric
locks fail? (BACK doors too, please!)
Isn't it about time???
And to go further, I wonder if it's possible to have a device
which can monitor temperatures inside and sounds...
.
I'm in a wilderness village, and at an age where I don't travel, so I'm not sure about my general area, but my village uses 12,470/7,200 domestic.
Eleanor White
I thought I'd post an example of a small insulator installed on a recently-set pole here in northern Ontario Canada. The system is 12,470/7,200 volts:
That's what I meant when I thought I'd seen some rather slender high voltage insulators, probably some sort of rubber molded around a...
Heard this from an engineer who worked on a
rural diesel generator system feeding an
18-mile, 12.5 kv distribution line.
The line had two sets of main line fused
disconnects out on the main line, some miles
from the generating station.
(Pretty much all of the load was domestic, in
a couple of...
Here's a nice, compact summary about life
on Pitcairn, including links to two newsletters:
http://www.young.pn/pitcairn-today.html
Apparently they do have satellite-linked TV and
Internet.
The electricity rates appear pretty darn high,
from that page linked above:
Power costs as of January...
itsmoked (Electrical) wrote:
5 Feb 21 02:54
I'm surprised they can't parallel those generators. Seems trivial enough to prevent annoying blinks multiple times a day. I can imagine them switching to a smaller generator later at night to keep the efficiency up.
Needs something like a 60kW...
FacEngrPE (Mechanical) wrote:
4 Feb 21 00:24
This is the address in google maps I think. Adamstown PCRN 1ZZ, Pitcairn Islands. Looks about as far from everything as you can get, unless you go to Antarctica.
Eleanor White replying:
If someone finds Pitcairn too close to civilization,
there is...
ANSWERING MY OWN QUESTION re estimated voltage drop:
I thought I'd try an on-line voltage drop calculator
to estimate the voltage drop around the average load
on Pitcairn Island. The image below is a quick
result:
That quick estimate suggests that under the worst
possible condition, i.e. a...
Looking at the street view images, my guess
is the system uses, oh, maybe #2 copper?
And itsmoked (post above) found a statement
that average load is 35 kw.
I found a statement that there are three
circuits (which makes sense from a 3 phase
generator.)
35 kw divided by 0.23 kv is 152 total...
REPLYING TO THREE POSTS HERE - I don't see an option
to reply to individual posts:
stevenal (Electrical) posted:
How did you get 2,400/4,160? When I zoom in to the insulators, they appear quite small. Found a street light, which appears to be wired directly. Nice phase separation for 220V...
Got it, thanks Bill.
The village appears to be at least a couple
of thousand feet from end to end, and more
for some of the outlying buildings.
One has to wonder about how voltage drops
are handled, given that the attachment
above says "... all households operate the
usual household...
I'm a retired distribution engineer, and I
thought some things I've recently learned
about the Pitcairn Island distribution
system might be of interest:
ATTACHED is a document describing, in
non-technical terms, what's there now, and
proposing a solar boost for the diesel
generators...
