[Date Prev][Date
Next][Thread Prev][Thread Next][Date
Index][Thread Index]
RE: UK Voltage
Keith Doxey [mailto:lists.diyha@xxxxxxx] wrote:
> It hasnt changed here yet for one reason.
>
> Our spec was 240V +/- 6%. but equipment was usually designed
> for +/- 10%. There is an awful lot of legacy equipment the was
> designed to those limits
> That gives a designed working range of 216 - 264 volts.
240 @ 06%: 225.6v (0.94) <- 240.0v -> (1.06) 254.4v
240 @ 10%: 216.0v (0.90) <- 240.0v -> (1.10) 264.0v
> The new standard is 230V +/- 10% which is 207- 253 volts.
Why did they not tighten or keep the threshold the same +/- 6%
230 @ 06%: 216.2v (0.94) <- 230.0v -> (1.06) 243.8v
230 @ 10%: 207.0v (0.90) <- 230.0v -> (1.10) 253.0v
> If we had changed to 230V then the lowest permitted voltage is
> BELOW what some equipment was designed to operate on and early
> electronic equipment with Linear power supplies could fail to
> work properly. Anything with a Switch Mode PSU should be OK.
230 @ 6% fits within 240 @ 10%, but instead we make the boundries
even wider, Doh!
> I believe the plan is to wait a few years before dropping the
> voltage to the new level by which time the older equipment
> should be decomissioned.
Yer right, hows about 230 +/- 1%.
--
______ __ _ ______ ______
/ ___ / / / / __ / _____ HOME: chas@xxxxxxx
/ / /_/ / /__/ / / /__/ / / /__ http://www.kaosuk.co.uk/
/ / __ / ___ / / ___ / \__ \ ----
/ /__/ / / / / / / / / / _____/ / Rob Chasmer, MMT Computing
______/ _/ /_/ _/ /_/ ______/ robert.chasmer@xxxxxxx
This email and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.
If you have received this email in error please let us know by e-mail reply
and delete it from your system; you may not copy this message or disclose
its contents to anyone. Please note that any views or opinions presented
in
this email are solely those of the author and do not necessarily represent
those of MMT Computing plc. Finally, the recipient should check this email
and any attachments for the presence of viruses. MMT Computing plc accepts
no liability for any damage caused by any virus transmitted by this email.
Home |
Main Index |
Thread Index
|