Re: Anyone know how to revive an AD10

["Simon Coates" <ecolume@xxxxxxx>]

What about microwave ovens.  Cooking time info on ALL food packaging would have to be changed if supply voltage is dropped to 230V.

Also, discharge lighting circuits will give the wrong lamp current - leading to things like lower lamp life, esp. for metal halide lamps (expensive).  There are millions of devices in the UK that would be sensitive to lowering the supply voltage.

What about the additional transmission losses across the national grid?  Will electricity prices increase to compensate?

 

What's wrong with good old British 240V? :o)

 

Regards

 

Simon

----- Original Message -----

From: Keith Doxey

To: ukha_d@xxxxxxx

Sent: 01 February 2002 23:01

Subject: RE: [ukha_d] Anyone know how to revive an AD10

240V is within the 230 +/- 10% which is why it hasnt really changed.

 

A lot of older UK equipment would not work at the lower end of the 230V limit because it is way below what the equipment was designed for. I believe the voltage will be dropped to 230V once a sufficient period has elapsed to allow for older equipment to become obsolete.

 

Many modern switch mode power supplies will accept 90-240V without adjustment.

 

Low voltage is a big killer for Fridges and freezers, the motor doesnt have enough power to turn against the force of the compressor so it stalls, this causes it to draw more current than normal through a single winding, normally when the motor is turning the current is switched through different windings by the commutator and brushes. Because of this the winding overheats, burns the enamel insulation of the winding, becomes a single mass of copper and the fuse goes bang. End of motor :-(

 

Keith

-----Original Message-----
From: Simon Coates [mailto:ecolume@xxxxxxx]
Sent: 01 February 2002 19:56
To: ukha_d@xxxxxxxSubject: Re: [ukha_d] Anyone know how to revive an AD10

Supply Voltage should be 240Vac +/-6%  (225V to 254V)

Although this may have now changed to 230Vac +/-10% (207V to 253V) for European 'harmonisation' - although UK is still 240Vac

So 96V is very low.

As for compensation - you've probably got a better case for compensation than if the power had failed entirely.  But you would have to prove that the low voltage situation led to the relays welding on.  This would depend on what type of equipment you had on your AD10s.

 

Simon

----- Original Message -----

From: Derek Clydesdale

Is anyone familiar with what happens to AD10's in low mains voltage conditions?

 

On Wednesday night, I arrived home to find all the lights in my estate dim.

 

A quick check of the mains revealed the supply voltage was only 96 volts !!!

 

A quick call to my electricity provider - who said the fault was being fixed, and low and behold, it was fix less than an hour later.

 

I have a range of Appliance and Lamp modules in my house, plus two AD10's - one for my heating, and one for my hot water heater.

 

During low voltage conditions, only some of the X10 kit worked, so I unplugged everything.  Once normal service was resumed, all the lamp and appliance modules are working fine again, although they all needed to be unplugged and replugged to make this happen. 

 

However, my AD10's are buggered.

 

One, which controls the heat, and was probably "on" at the time the voltage dropped, is now permenantly "on" all the time.  Neither sending X10 commands or using the over-ride switch to force it off will work.

 

The other, which was "off" at the time, is now permenantly off, and like above, cannot be forced on.

 

I have tried applying mains to the momentary contact or toggle inputs to see if that works - but no joy.

 

I opened one to see if there is any visible damage, but it looks fine.

 

Any ideas how I could fix them?

 

 

Failing that, has anyone ever claimed compensation from their electricty supplier for damage due to poor mains supply?

 

 

Cheers

 

Derek Clydesdale

 

PS.  Strangely enough, when the mains was down to 96 volts, many electrical appliances still worked.  All my TVs, VCR, Satellite etc. were fine.  Just shows how many PSUs are really dual voltage these days :-)

 

For more information: http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:  ukha_d-subscribe@xxxxxxx
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
List owner:  ukha_d-owner@xxxxxxx

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

Yahoo! Groups Sponsor

ADVERTISEMENT

For more information: http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:  ukha_d-subscribe@xxxxxxx
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
List owner:  ukha_d-owner@xxxxxxx

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.