Electronic load

[TTman]

Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to have
5 x 100R 100Watt resistors and a big heat sink ? test time would be <
1minute...

 

[John S]

Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to have
5 x 100R 100Watt resistors and a big heat sink ? test time would be <
1minute...

Have you tried a toaster, toaster oven, etc?

 

[tm]

Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to
have 5 x 100R 100Watt resistors and a big heat sink ? test time would be
< 1minute...

5 or 6 100 watt tungsten halogen bulbs?

 

[Baron]

TTman Inscribed thus:

Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to
have
5 x 100R 100Watt resistors and a big heat sink ? test time would be <
1minute...

500W Halagen bulb.

 

[Lasse Langwadt Christensen]

TTman Inscribed thus:







500W Halagen bulb.

just remember it is pretty much a dead short until it heats up

-Lasse

 

[Harry Dellamano]

just remember it is pretty much a dead short until it heats up

-Lasse

Give me your mailing address and I will send you two 10R 250W resistors.
Small heat sink may be needed.
Cheers, Harry

 

[[email protected]]

Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to have

5 x 100R 100Watt resistors and a big heat sink ? test time would be <

1minute...

Heathkit used to sell a load for use with transmitters. If I recall correctly it was about ten 2 watt resistors suspended in a gallon of oil.

Dan

 

[TTman]

Give me your mailing address and I will send you two 10R 250W resistors.
Small heat sink may be needed.
Cheers, Harry

Thanks, but it's for a company... they can pay...

 

[Nico Coesel]

Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to have
5 x 100R 100Watt resistors and a big heat sink ? test time would be <
1minute...

I'd oversize it a bit and use 5 200Watt resistors. For a similar load
I used this heatsink:
http://uk.farnell.com/fischer-elektronik/la-17-200-24v/heat-sink-fan-cooled-24v/dp/1222532

You may expect the load to be present for 1 minute but in reality it
may need to run longer.

Otherwise look for an electronic load from Array and use two 300W
units in parallel.

 

[Martin Riddle]

Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to have
5 x 100R 100Watt resistors and a big heat sink ? test time would be <
1minute...

Five 100 watt or larger resistors are fine for a 1 minute test. whats
the duty Cycle?
A Muffin fan blowing across the resistors helps a lot.

www.processheating.com has Edison Base cone heaters, but they are
120v.


Cheers

 

[Phil Allison]

"TTman"

Any simple way to dump 500Watts fixed @100 volts ?

** Is it DC or AC and if the latter what frequency ?

Makes a big difference to what load is suitable.



..... Phil

 

[John S]

Thanks, but it's for a company... they can pay...

In that case, here ya go...

http://www.mouser.com/ProductDetail/Ohmite/TAP600K100E/?qs=J7wendzZL92qQ9FmNBLYqw==

watch the wrap

 

[Martin Riddle]

In that case, here ya go...

http://www.mouser.com/ProductDetail/Ohmite/TAP600K100E/?qs=J7wendzZL92qQ9FmNBLYqw==

watch the wrap

Real Engineers use these Vishay power resistors...
<http://www.mouser.com/ProductDetail...=sGAEpiMZZMtbXrIkmrvidN4mEkqhIB4UyKgxQhwWN7Q=>

Plus they are not expensive and very robust. Dont forget to order the
hardware for mounting.

Cheers

 

[John S]

Real Engineers use these Vishay power resistors...
<http://www.mouser.com/ProductDetail...=sGAEpiMZZMtbXrIkmrvidN4mEkqhIB4UyKgxQhwWN7Q=>

Plus they are not expensive and very robust. Dont forget to order the
hardware for mounting.

Cheers

But they are wimpy at only 200W. Just like engineers, maybe. Get the
600W version and please Tim the Tool Man.

 

[Robert Baer]

Have you tried a toaster, toaster oven, etc?

Most toaster and toaster ovens are in the 1000W region and use a
bang-bang temperature controller...

 

[Fred Abse]

Thanks, but it's for a company... they can pay...

Check out the Vishay-Sfernice LPS300 range. 300W per unit up to 85C/
Rth case-heatsink 0.112C per watt.

A couple of 10 ohm ones, in series, bolted to a really big heatsink,
should do 500W, 100V, fine.

Farnell should have them in the UK.

Read the datasheet, and do what it says...

 

[zwit]

Any simple way to dump 500Watts fixed @100 volts ? Or is it easier to
have 5 x 100R 100Watt resistors and a big heat sink ? test time would be
< 1minute...

light bulbs

 

[Phil Allison]

"zed wit"

"TTman"

light bulbs

** Why do so many fools suggest bulbs in place of resistors ??

Incandescent bulbs use tungsten wire that has a strong positive tempco - so
much so that the effective resistance value changes over a ratio of about 12
times from room temp to full brightness.

OTOH, high power resistors use wire that has almost no tempco and the same
goes for heating appliances ( jugs, toasters room heaters etc).


.... Phil

 

[Uwe Hercksen]

** Why do so many fools suggest bulbs in place of resistors ??

Incandescent bulbs use tungsten wire that has a strong positive tempco - so
much so that the effective resistance value changes over a ratio of about 12
times from room temp to full brightness.

Hello,

the fools are not aware of the dramatic change of resistance between a
cold and hot bulb...

Bye

 

[Phil Allison]

"Uwe Hercksen"

Hello,

the fools are not aware of the dramatic change of resistance between a
cold and hot bulb...

** They should measure the resistance of a cold bulb some time....



.... Phil