Powerdynamo, PD AC systems, fuse blows when lights are off

Powerdynamo brings new ignition & light
to your vintage motorcycle

Company

Products

Technical Help

Search

    

AC Regulator: Fuse blows when lights are turned off
Sounds a little weird, but often in systems with a Powerdynamo AC regulator  the fuse blows when lights are switched off.
  • this small AC regulator is of a type that burns surplus voltage (not the case in our DC regulators) l
  • So, with lights off, the regulator tries to burn all offered voltage. The result is some high current (depending on revs) of around 10 Ampere. With lights on this  sinks to about 6A.
As it happens that motorcycles equipped with our AC system are driven (even if briefly) without lights the fuse might blow.

We are therefore renouncing on the fuse in our AC wiring instructions. That is the fuse in our AC systems is omitted  as the AC system does not have a battery anyway. 

Given the high current (and the heat generated with this) we urgently recommend to always drive with lights on when the AC regulator is present.  (Alternatively you may drive conmpletely without regulator should you not noeed lights. Than just keep the 2 black wires from the generator insulated (!) free.
back to Knowledge base