Question 1

Why do some power resistors make a strange noise?

Accepted Answer

Yes some whistle or rattle!!  This is a problem of the old wire wound ceramic resistors, as they light up  and glow they get very hot

Question 2

Why do old technology power resistors GLOW?

Accepted Answer

These old wire wound ceramic resistors, light up when they are loaded with electricity!  They can laso vibrate making strange noises.

Aston technology does not glow because it is fully enclosed and insulated with no fragile ceramic.

Question 3

Why is my power resistor so heavy?

Accepted Answer

because ceramic or cement is heavy

Question 4

Why do some power resistors have a protective cage?

Accepted Answer

All of our competitors use this old technology where the resistive wire is coiled like a spring and wrapped round a ceramic rod.  This wire is live with a high current and seriously dangerous, it is also very hot, up to 500°C, so the cage is there to protect from electric shock and burning heat.

SMART technology is enclosed and insulated so no chance of an electric shock.  We still use cases on many of our products because the market expects to see a case as our tecnology is not well known yet.

Question 5

Are your products customizable to any ohmic value or resistance value?

Accepted Answer

Yes, within reason each product has a hugh ohmic range.  In most cases this does not impact price.

If you have any particularly unusal ohmic value you need then give us a ring.  We are able to customise not just ohmic value but also the form (external dimesions) of our resistors with relative ease.

Question 6

Is there a connection between Nominal Power and resistance?

Accepted Answer

Not really.

Question 7

Do you have any UL rated products?

Accepted Answer

We are still based in Italy and not exporting to the USA, so for now we dont.  If you need a resistor that operates at a low heat then talk to us and we will help you select the right resistor type and we may include a a thermal switch to ensure the resistor operates as you want it.

Question 8

What is Nominal Power

Accepted Answer

This is the power rating for the resistor at....

Question 9

What is the connection between Nominal Power and the power I need to dissipate?

Accepted Answer

Well......in most situations the MAX power OUT (from the electric motor) should match the MAX power IN to the resistor.  But, in that case you would have a resistor that is oversized for 99,9% of its actiity.  To avoid the cost of over specifying, most applications from our collective 150 year experience dictate a factor of 3 so that if the motor has an output of 3kW then the resistor should be say 1kW.  Of course this wont cover all eventualities but will cover 99,9% of them.

We are happy to help you specify the right resistor for any specific work parameters, just give us a call!!

Question 10

How can I link the lift or crane characteristics to the size and type of power resistor?

Accepted Answer

Well.....

Question 11

Why do your competitors have so many different types of power resistor model?

Accepted Answer

This is because since everyone uses the same old technology their margins are thin.  Therefore they have to minimize whatever they can for different applications to carve out excess capacity and maintain a profit.

Our technology is far more forgiving and flexible, not quite one type fits all but almost...so overtime our technology will ebcome cheaper as we gain economies of scale.

Question 12

What does the dielectric insulation rating mean?

Accepted Answer

this means that electricity inside the resistor cant leak out

Question 13

Can you apply thermal switches to your products?

Accepted Answer

Yes

SCIENCE DRIVING VALUE

FAQs