Fuse Blowing HELP

[mygrumpy]

Hi.Wheel of ground runs fine.wheel on ground blows fuse.could the ratio have anything to with this,changed from belt drive to chain drive,gone from 11/1 to 3.4 /1 ratio.Motor RPM 4450,is the RPM to high. HELP.John

 

[john]

Hi.Wheel of ground runs fine.wheel on ground blows fuse.could the ratio have anything to with this,changed from belt drive to chain drive,gone from 11/1 to 3.4 /1 ratio.Motor RPM 4450,is the RPM to high. HELP.John

Is the fuse between the battery and controller (normal) or between the controller and motor (not normal)?

Do you have a meter to measure the current?

How much throttle do you need to apply before the fuse blows?

 

[mygrumpy]

fuse blowing

Hi. John, the fuse is between battery & controller.the fuse blows straight away when you twist the throttle. john

 

[john]

Hi. John, the fuse is between battery & controller.the fuse blows straight away when you twist the throttle. john

Perhaps your controller is not limiting current enough. Do you know what the controller model is and what the current limit is?

 

[Wizard9956]

Just an idea , but maybe your getting current flow thro the chain where as you wouldn't have with a belt , try removing the chain and then see if the fuse still blows , either that or you have a cable that's shorting when you place the bike on the ground .

atb

Wizard

 

[mygrumpy]

controller

Hi.The controller is a 4QD Uni 24/8 OUTPUT CURRENT 115 AMPS. It`s only blowing fuses when loaded.John

 

[john]

Hi.The controller is a 4QD Uni 24/8 OUTPUT CURRENT 115 AMPS. It`s only blowing fuses when loaded.John

Sounds like the controller is pulling more amps than your fuse can take in that case. Mind you, you shouldn't need 30 amps to get the bike going.

Is the throttle working correctly? Can you vary the speed ok?

Have you tried lowering the wheel to the ground slowly or applying the brakes to see when the fuse blows?