Fuses

Forgot to add, if you need to source the 10A fuse, try a TV video or other similar service centre as they should have one.

Hi
Cannot edit , so a question
RE"Has gone well until last summer we plugged into domestic power and fuse blew"
Not sure just what you mean, what did you use between it & the 240v mains [domestic power]

Peter

Hi Peter,

The Evakool RF and FM series Fridge / Freezers that used to come with fuse holders came with 10 Amp glass fuses installed at the Evakool head office in Caloundra.

We now use a 15 Amp circuit breaker in place of the fuse holder.


The Danfoss electronic board that we use has a 10 Amp cut-out built in, if the fridge tries to use more than 10 Amps the fridge stops straight away and flashes an error code to show there is an issue.


The fuse holder or circuit breaker is designed to protect the fridge from short circuits.


Thanks.

"The fuse IS to protect the unit, & size is determed by the maker "

What a load of codswallop!!

Fuses are to protect the power supply, be it a battery or generator and conductors supplying the appliance.

A thermal cutout device protects the appliance.

regards,
D.

HI Dion

Perhaps you should make sure you KNOW what you are talking about BEFORE you mouth OFF

Fuses serves different purposes depending on WHERE THEY ARE LOCATED

I do not know where you obtained YOUR electrical knowledge IF you are not aware of THAT
The SIZE & location of THAT fuse has nothing to do with protecting the power supply [source]BATTERY OR GENERATOR!!!

A fuse is a thermal device , MANY devise have fuses ,often internal ,to protect the devise
But I suppose you mean thermal OLCBS
They TOO depend on location as to what they are protecting
Used to protect wiring , source, devise, just as fuses are!!!!!

YOU certainly need to brush up on YOUR ELECTRICAL knowledge BEFORE YOU POST MORE SUCH RUBBISH

I see that Evacooll has given an answer as to the now preferred fuse size & note he has said "SLOW BLOW TYPE"
Ceramic fuses are fast blow type& are less capable of handling initial start up current


Peter

Hi Evacool
Thanks for that update on the FRIDGE protection


Peter

HI Dion
RE :"But I suppose you mean thermal OLCBS"

Perhaps you are not referring to the above, but a TEMPERATURE sensitive cut out , some self resetting , other fail permanently open ???
IF so yes, SOME low current devices do have THOSE , but fuses or thermal [current based] circuit breakers are at this stage STILL more common.[especialy for higher currents]

Peter

I can't believe what I just read..... most circuit protection work on thermal methods, a fuse is a thermal device ..... when the current exceeds the thermal rating of the fuse the resistance increases generating heat melting the filament.

Just because a fuse is rated in amps it still relates to energy.

A fuse is designed to protect the wiring and circuit it is before and not the power supply.... why would you need to protect a car battery (power supply).

Ummmmm you need to protect the battery from short circuits. Batteries create an incredible amount of heat. Short circuits create lots of heat, batteries do explode when shorted and insulation dripping off conductors does combust. Flames where they are not wanted have a tendency to destroy things.

We do have the remains of some inadequately insulated tools at work to show the newbies the amount of instantaneous heat that a battery will produce from a short circuit where there is no protection.

Don't fuse all your conductors coming from a battery post, then do so at your own peril.

Another saying worth remembering, 'One flash and you're ash'

Cheers,
Dion.

Hi Dion

Sorry but that last post shows you have very little electrical understanding

That fuse AT the battery IS TO PROTECT THE CABLES NOT THE BATTERY

HAVE you any idea of the size fuse you would need to protect the battery & still allow full utilzation of its max output capacity???

YES, ALL cables leaving a battery should be fused AT THE BATTERY TO SUIT the CABLE CURRENT Rating!!!

FUSES/Thermal cbs in devices as the one in question are to protect the devise
That may be from it drawing excess current[faulty or overload ]

Fuses /THERMAL cbs may also be used to protect the device from putting out excess current such as inverters ,& generators

THE LOCATION OF the FUSE /THERMAL CB determines it's purpose

BOTH fuses & thermal cbs ARE thermal type protection

The choice of which to use & THE TYPE can be dependent on either the application or the makers choice

Note Eva cool's comment on "SLOW BLOW FUSES" being required

Peter

Mate, PLEASE lay OFF the CAPS it's DRIVING me NUTS. Im sure YOU'RE trying to MAKE some VALID points BUT it HURTS to DECIPHER. merry Christmas.

Hi Oldtrack123, YOU obviously have little understanding of the current a battery can put out and the speed at which it can cause a fire in an unprotected circuit.
Unfortunately fuses or OLCB at applainces do not stop melting conductors causing fires or batteries exploding.
Still believe in Santa and the Easter Bunny??

Kindest regards,
Dion.

Hi Dion
Re :"YOU obviously have little understanding of the current a battery can put out and the speed at which it can cause a fire in an unprotected circuit.
Unfortunately fuses or OLCB at applainces do not stop melting conductors causing fires or batteries exploding.
Still believe in Santa and the Easter Bunny??""

You obviuosly have great difficulty in reading & understanding

I said from the start

Location of the fuse/olcb determines what they protect

I have said ALL circuits should be protected@ the source with fuse /olcb suited to the cable rating to protect the cables

I said fuses/olcbs are used @ the equipment to protect the equipment
The fuse in question by the OP was /is to protect the fridge

Reread it all very slowly Perhaps you will then understand all that has been said

I hope you are not an electrician or an 1st year electrical apprentice because you have a lot to learn

I did ask you one question:
, What size fuse would you use to protect say 700amp CCA battery or say a 400amphr battery bank

Now I'll ask a 2nd, have you EVER seen such a fuse fitted in a van ,motor home etc

Just for your information I am an electrician with over 65years experience with all types of equipment including eqiupment whose output current is in the tens of thousands of amps range
Now that does make a splat
I do KNOW more about circuit & equipment protection than you could even imagine
I have a lot of understanding, as head service technician for a large electrical & heavy engineering co servicing a greater range of equipment in use & sold by them than you will probably ever see
I was head electrician & contractor's licenseholder for the same co [supervising all their Engineering works maintenance electrical staffj until retirement

What are your qualifications????

Peter

HI Dion
Another chance for you to show your amazing knowledge about batteries

Do you know what actually causes most batteries to explode?

Please inform us ,who believe in the Easter bunny, the actual process, stage by stage.

Then perhaps you could inform us of the precautions needed with batteries especially in the RV area, to minimize the risk of explosions,

Just to make it easy ,we will settle for flooded lead acids & AGMs

Peter

Hmmm Oldtrack123, even with your claimed 65 years experience, I'm tipping I've probably forgotten more about batteries that YOU still have to learn ;-)

(So that most deffinantly puts me out of the 1st year apprentice category) however decades of nurturing batteries BIGGER and with capacities in excess of what you could imagine.

Kindest regards,
Dion.

Hmm Oldtrack123, A wise old owl once said never argue with a fool, as they will drag you down to their level and then beat you with experience.

Before I get dragged down to that level, Adious.

Kindest regards,
Dion.

HI Dion
I will let others make the final decision on who is the fool

Your very first post, was some of the worst CUDSWALLOP I have ever seen & showed you did not have a clue about the real electrical world

Your further posts just added to the heap of CODSWALLOP

I note you did not answer ANY of the questions put to you ,why??

So I'll add two, more what size are those big banks of batteries [voltage &capacity] & what size FUSE do they have to protect them

All the above should be easy with all that amazing knowledge you have about batteries & caring for them

The FACTS are simple:
[1]Both fuses &/or OLCBs are used to protect cables upstream from them from overheating due to excess current
[2]Both fuses &/or OLCbs are used to protect devices they are connected to from overload ,or excessive damage if an internal short occurs
[3]Many devices have internal fuses or OLCBS for the same reasons as in[2][
[4] some sources are self limiting in current & do not require fuses or OLCBs if the cables are adequate to carry the limited max current
[5]most sources do have some form of protection against overload that may be fuses .OLCBs or a temperature sensitive cutout
But additional protection is required downstream unless the source is only supplying a single device
The fuse may then be rated to the cable or the device which ever is the least,
[6] Generally all cables should be protected at their source with suitably rated protection [fuses or OLCB]

Fuses come in many types,"fast blow ,"slow Blow'' HRC "[high rupturing capacity ]., "HRC motor start"[ a delayed type HRC] , different voltage ranges , with different voltage rating depending on the current being AC or DC ,
[some not suitable for high voltage DC particularly with inductive loads,]etc

OLCBs come as ."Thermal ",, "Magnetic"& combined "Thermal magnetic"
Each has a specific purpose

Then we have the temp type cutouts fitted within the device & operates on actual temperature, not current

Each has a purpose, dependent on where it is fitted

All the above are well recognised & accepted in the Real electrical world where lives & property depend on the correct use

But if you can point out & EXPLAIN why any thing I have posted is CODSWALLOP please do so

I am big enough to stand the embarrassment

Peter

When the frig cranks up it pull a lot of amps for a few seconds. Not the rated as read in the brochure. Maybe your fridge is carked but then you got nothing to lose if you accept above advice.

Owen