Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
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As I told you on the prior message, last week I was in Cartagena and I took the opportunity to go on board and revise the bow thruster.
Now I can confirm what I wrote before .
I do not know if the Santorin #96 of Ian was built in the same year of ours Maramu , but according to the increment of power and torque I suppose it is a later edition .
My bow truster motor label shows :
Motor Leroy-Somer , Type TF12 , #642249/5 , excitation in serie , 2700 rpm , 4.2 kW , 1.5mkg , IP20 protection , S2.20SE duty , Rotor/inductor 12 V 530A , F class
In my opinion 530 A is a start-up pick current . In January , when I will be again on board, I will measure with the clamp meter the Amps absorbed at the different conditions. Also using cables 3/0 (85mm2) from the main switches to the the distribution box and 1/0 (50mm2) from there to the motor, due to the drooping voltage of the 12 V system, I think it cannot absorb more than 350 A . It will be interesting to know the size of cables used on a 24 V bowthruster.
I noted also the following info that you may be interested to know:
- Bearings: power shaft side 6005 2RS 25x47x12 mm (ID- OD- W)
commutator side 6201 2RS 12x32x10 mm
- Inside the holding brush flange there is an occult connection for the opposite brush.
- A2 feed 1st and 3rd brushes
- A1 2nd 4th
- D1 & D2 feed opposite sides of 4 stator windings
- At the motor teminals posts arrive 4 #1/0 cables (50mm2) ,3 from solenoids (A1, D1, D2) and 1 direct (A2=negative).
- Electrical measurement on the feeding cables A1, D1, D2, A2, disconnected from the motor posts shows :
1) no excitation at the solenoids - V=0 at A1, D1, D2, but in short by them
2) switch ON , joy stick to LEFT - 12V only on D2, short between A1, & D1
3) switch ON , joy stick to RIGHT- 12V only on D1, short between A1, & D2
Sorry for my English mixing Spanglish & Itañol
S/V Sunny Side
Maramu #219 1987
Todomar yard Cartagena
San Blas Jan.-April
From: "James Alton lokiyawl2@... [amelyachtowners]"
Sent: Thursday, 19 October 2017, 12:55
Subject: Re: [Amel Yacht Owners] Re: Distributed vs. Conventional Electrical Systems
Many thanks for that bit of information. My Maramu has a 100 amp breaker for the bow thruster and the Genoa furler. Does the Santorin also have a breaker and if so can you tell me the amperage rating? If not, do you know the wattage rating of the motor? My current thruster is fantastic and I am in no rush to change anything, but if there is a simple and proven option to increase the power such as a motor changeout, I would like to make that upgrade in the future.
I finally got to see a Santorin up close this season, two actually. Very nice boats, congratulations. I also appreciate the fact that my Maramu is not as complex as the SM and for the wife and I 46’ is a nice size that we can easily handle. Both are wonderful boats I think but fewer moving parts to break means I get to spend more time outside of the bilge and the engine room. (grin)
SV Sueno, Maramu #220