I don't know about Hanse but in general the system has either a fuse or more likely a breaker for both the high amperage and low amperage sides of the system.
The low amperage side for the solenoid switch/foot switch side and a high amperage breaker for the main feed to the windlass
motor. That's on most boats.
Does your windlass take the main feed from the main
battery bank or does it have it's own dedicated
battery forward in the
hull?
Is the power for the low amperage relay come off your main panel?
My
current system has the main power to the windlass coming from a breaker mounted in proximity of the main house batteries(golf cart sized monsters), with a live feed from there to a foot switch mounted through the
deck. The solenoid actually completes the grounding portion of the circuit back near the
batteries. This system was installed by a dealer prior to my
ownership of the
boat.
The feed for the low amperage was taken in the same area and had a fuse locally for it. When you hit the switch on the main panel all you are really doing is completing the circuit, the foot switch is making the final contact.
Does your on
deck switch just have a low amperage wire to activate a solenoid for the high amperage side or does it conduct the high amperage connection to the
motor? Two direction motor or one direction motor with a release
clutch?
There are a few different ways to wire these, it all depends on who installed it. I don't know about Hanse but many overseas builders send the
boat over without some of these systems and then have them installed by the agent or their contractors here. Factory installed or stateside installed? If factory you should be able to contact them for more info, if not, good luck in finding out who installed it and how it's wired. You'll just basically have to track it down with your meter and a good flashlight.
Hope you get a response from another owner with a similar system, if not, put a little more detailed description of the system you have on here, more info always helps.