supply voltage

[ChrisRogers]

I think my supply voltage is too low, or at least the voltage drop on the incomming circuit is too low. - joging by the fact that the lights in the house dim when ever anything is turned on! eg hoover, wastedisposal, hot tub.

i was thinking of turning everything on and seeing if i can measure my incomming voltage. does anyone know what is the lowest voltage i can be supplied with is?

bit of a chage to people complaining about lightbulbs not lasting long because the voltage is too high.......lol

 

[ryanj]

The voltage in the UK, may be 10% either way from 230v.

That'll give you, 207v for the lowest and 253v for the highest.

 

[securespark]

The dimming you speak of is quite common in my experience.

 

[plugwash]

i thought it was +10% -6% at the intake atm

you can mesure it with a multimter on the incoming terminals of the CU but be very carefull when doing so

 

[ban-all-sheds]

The voltage in the UK, may be 10% either way from 230v.

No - we're not due to be ±10% until 2008.

 

[dw3101]

it is +10% -6% at the moment!

 

[dw3101]

as part of an email from a Man in the know.. as someone I know was claiming something I thought to be wrong but over my head (Formally and electrical design consultant for YE.. now major projects / network design etc.. iee member and all that sh1t.. (My Dad)

1) You take supply at 11,000 volts which we will keep at ± 6%
2) You transform this to LV yourself and it's up to you what voltage
you run at and how close a tolerance you keep to.
3) If it was an LV supply from us, the voltage would be 230 V with a
tolerance of + 10%, -6% (not 240 Volts)
4) 230 volts RMS has a peak value of 325 volts.
5) When any phase is at its peak, the other two are not at their
(negative) peak. They're both the same voltage (half volts) and at
that instant one's heading down, the other's coming up.
6) Phase to phase voltage is root 3 times phase volts (near enough
400 V for 230 V system), not twice peak volts.


.
A.E.*** - Network Investment
. e-mail - ar***.***@yedl.com
(Tel 746 5**** (01977 60***)(
Fax 746 5*** (01977 6****)

 

[plugwash]

as part of an email from a Man in the know.. as someone I know was claiming something I thought to be wrong but over my head (Formally and electrical design consultant for YE.. now major projects / network design etc.. iee member and all that s**t.. (My Dad)

1) You take supply at 11,000 volts which we will keep at ± 6%
2) You transform this to LV yourself and it's up to you what voltage
you run at and how close a tolerance you keep to.

seems about right though i wouldn imagine you would need special kit to get better tollerance than the supply

3) If it was an LV supply from us, the voltage would be 230 V with a
tolerance of + 10%, -6% (not 240 Volts)

notice how 240V sits comfortablly within that band

4) 230 volts RMS has a peak value of 325 volts.

assuming its a sine wave i make it 325.26911934581186122438840656823

5) When any phase is at its peak, the other two are not at their
(negative) peak. They're both the same voltage (half volts) and at
that instant one's heading down, the other's coming up.

true they aren't peaked but they aren't at half volts either

6) Phase to phase voltage is root 3 times phase volts (near enough
400 V for 230 V system), not twice peak volts.

assuming its 3 phase not split phase this is correct

.
A.E.*** - Network Investment
. e-mail - ar***.***@yedl.com
(Tel 746 5**** (01977 60***)(
Fax 746 5*** (01977 6****)

 

[pipme]

Read Note on Supply Voltage Level

Here ! interesting !

P

 

[ban-all-sheds]

It's out of date:

It is proposed that on January 1st, 2003 the tolerance levels will be widened to +/- 10%.

that was pushed back to 2005, and then in July 2001 the CENELEC Technical Board decided to continue with the existing tolerances until 2008.

 

[pipme]

Thinking more in terms of the whole page not just the tols.

Perhaps here Particularly para Effects on Equipment

Is it all worth the potential complications ?
Have those potential complications inspired the shift toward Part P etc ?

P