Thermal Cut Out On Fan Motor

[undertaker]

theres 2 possibilitys either the windings are shorting and overloading or the cutout is tired .a clamp on ameter is realy needed to test full load current otherwise its guesswork. if its just the mcb tripping and not the rcd theres no leakage to earth just a short

Problem is there are no fuses tripping. Will clamp round it tomorrow and see what the reading is. What am I looking at for a general guide? The blower is a 0.75hp unit - not a 1.5hp as I previously stated.

 

[brightspark]

Problem is there are no fuses tripping. Will clamp round it tomorrow and see what the reading is. What am I looking at for a general guide? The blower is a 0.75hp unit - not a 1.5hp as I previously stated.

it should tell u on the info plate full load current in amps. if it exceeds it on measuring the windings are faulty

 

[undertaker]

it should tell u on the info plate full load current in amps. if it exceeds it on measuring the windings are faulty

What would be the fix for the windings? I'm hoping not to have to replace them The motors are also an **** to get hold of too

 

[madkayaker]

What would be the fix for the windings? I'm hoping not to have to replace them The motors are also an **** to get hold of too

Replacement motor. Unless its very specialist not worth rewinding these days

 

[brightspark]

if the windings are gone its not worth getting them re wound . u can generaly pick complete units up from autojumbles or bootfaiirs for 20 quid

 

[undertaker]

What would go wrong it a load of copper coils? Broken wire or something?

I really don't understand these things hence all the questions lol.

 

[brightspark]

What would go wrong it a load of copper coils? Broken wire or something?

I really don't understand these things hence all the questions lol.

if the
motor stator coils have been overheated the insulation coating on them burns off and shorts them out and that increases the current draw and pops the cutout

 

[undertaker]

if the
motor stator coils have been overheated the insulation coating on them burns off and shorts them out and that increases the current draw and pops the cutout

Could they be taken apart and sprayed with plasti-cote?

 

[brightspark]

Could they be taken apart and sprayed with plasti-cote?

not realy once there cooked thats it £££££££

 

[undertaker]

Likely cause so I know for other stuff in the future?