Dimmable GU10

[ban-all-sheds]

It was written as " a transformer " and not specifically as a "wound transformer and not an electronic transformer".

There you are then - an insufficiently prescriptive request for the type of transformer to be used.

blame was allocated between the company that installed the lighting ( they should have known SMPS were not compatible with the type of equipment used on the laboratory )

There you are then - they used the wrong type of transformer.

and the building services manager who was aware that SMPS would disrupt the operations in the laboratory and should have made that clear by stating no SMPS to be installed.

There you are then - recognition that the client should have specified the type of transformer to be used.

 

[bernardgreen]

recognition that the client should have specified the type of transformer to be used.

And how many average buyers of lights for their house know what the difference is and what to specify when buying a "transformer" for their new lighting.

Maybe they could say " a transformer that will not stop my radio working " and hope the sales person knows how a "transformer" can stop a radio working.

Hint ..a wound transformer cannot stop a radio working but it might induce a low hum on the audio if very close to the radio.

 

[ban-all-sheds]

And how many average buyers of lights for their house know what the difference is and what to specify when buying a "transformer" for their new lighting.

Please show how, if you could magically make manufacturers stop calling their devices "electronic transformers", and use another name for them (e.g. SMPS) that that would automatically lead to the average buyer knowing that they should buy a transformer and not a SMPS when they don't currently know to avoid "electronic transformers"?

As we develop new things, there are new things to know, and therefore more things to know.

Electronic mail.

Electronic books.

Electronic records.

Electronic publishing.

Electronic transformers.

Electronic cigarettes.

 

[EFLImpudence]

A dropper resistor transforms voltage but no one called it a transformer. A SMPT is NOT a transformer even if it contains a small one.

That which transforms is therefore a transformer.

 

[EFLImpudence]

They, SMPS, do nit transform a voltage, they change one type of supply into a different form of supply. typically 230 volt AC into 12 DC eff

Change is another word for transform.

You could have written:
They, SMPS, do not transform a voltage, they transform one type of supply into a different form of supply.

 

[EFLImpudence]

It is the language which is being misunderstood; not the equipment.

 

[winston1]

They, SMPS, do nit transform a voltage, they change one type of supply into a different form of supply. typically 230 volt AC into 12 DC eff

No, that is a DC power supply. Transformers, in the electrical sense, do not rectify or change frequency.

 

[winston1]

They, SMPS, do nit transform a voltage, they change one type of supply into a different form of supply. typically 230 volt AC into 12 DC eff

No, that is a DC power supply. Transformers, in the electrical sense, do not rectify or change frequency.

 

[winston1]

They, SMPS, do nit transform a voltage, they change one type of supply into a different form of supply. typically 230 volt AC into 12 DC eff

No, that is a DC power supply. Transformers, in the electrical sense, do not rectify or change frequency.

They, SMPS, do nit transform a voltage, they change one type of supply into a different form of supply. typically 230 volt AC into 12 DC eff


if they only transform the voltage then how come the frequency is changed and the AC becomes DC

Because they are NOT transformers. They are DC power supplies.

 

[winston1]

They, SMPS, do nit transform a voltage, they change one type of supply into a different form of supply. typically 230 volt AC into 12 DC eff

No, that is a DC power supply. Transformers, in the electrical sense, do not rectify or change frequency.

They, SMPS, do nit transform a voltage, they change one type of supply into a different form of supply. typically 230 volt AC into 12 DC eff


if they only transform the voltage then how come the frequency is changed and the AC becomes DC


You would say customer was a victim of fraud if the falsely described item they had bought was anything other than an SMPS mis named as a transformer

 

[winston1]

I cannot find the document for the details ( and they may be restricted circulation )/

Around 2003 a company installed new lighting in a science laboratory. It was specified by the building services manager that the lighting was to be ELV supplied by a transformer. It was written as " a transformer " and not specifically as a "wound transformer and not an electronic transformer".

When the new lighting was switched on items of sensitive electronic equipment in the laboratory malfunctioned.

Spurious radiation from the several SMPS units was to blame.

Litigation ensued and blame was allocated between the company that installed the lighting ( they should have known SMPS were not compatible with the type of equipment used on the laboratory ) and the building services manager who was aware that SMPS would disrupt the operations in the laboratory and should have made that clear by stating no SMPS to be installed.

Clearly the installation company did know what transformers were, neither did the judge.

Wikipedia does:

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Electromagnetic induction produces an electromotive force within a conductor which is exposed to time varying magnetic fields. Transformers are used to increase or decrease the alternating voltages in electric power applications.

A varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core and a varying field impinging on the transformer's secondary winding. This varying magnetic field at the secondary winding induces a varying electromotive force (EMF) or voltage in the secondary winding due to electromagnetic induction. Making use of Faraday's law (discovered in 1831) in conjunction with high magnetic permeability core properties, transformers can be designed to efficiently change AC voltages from one voltage level to another within power networks.

 

[winston1]

And how many average buyers of lights for their house know what the difference is and what to specify when buying a "transformer" for their new lighting.

Maybe they could say " a transformer that will not stop my radio working " and hope the sales person knows how a "transformer" can stop a radio working.

Hint ..a wound transformer cannot stop a radio working but it might induce a low hum on the audio if very close to the radio.

Sadly, not many. But if he asks for a transformer that is what he should get not a SMPT.

 

[ban-all-sheds]

No, that is a DC power supply. Transformers, in the electrical sense, do not rectify or change frequency.

No, that is a DC power supply. Transformers, in the electrical sense, do not rectify or change frequency.

No, that is a DC power supply. Transformers, in the electrical sense, do not rectify or change frequency.
Because they are NOT transformers. They are DC power supplies.

So:

1. They do transform voltage.
   
2. They are called transformers by the people who make them, sell them and buy them.
   
3. There are no dangers of people ending up with something which is not what they need.
4. A useful exercise for the reader would be to consider where the balance of stupidity lies .

 

[stillp]

Is there an echo in here?

 

[ey143]

blimey....most of that went over my head.

So we changed the dimmer light switch with a Verilight dimmer switch and the same problem occurs with the old MR16 spot lights (6 of them) i.e. only some of them come on (2 out of 6) and a few of the other ones randomly come on after a few weeks of not working.

 

[stillp]

Transformers, in the electrical sense, do not rectify or change frequency.

What about rotary transformers? (Wikipedia is wrong about those as well!)