[PSUBS-MAILIST] MK-101 Connectors

Thu Jul 31 23:05:45 EDT 2014

Cliff, David, & anyone else following this;
the cable on the 50 amp per pin 4 pin high power connector is 18.2 mm diameter & if we went with a
blueglobe cable gland on the motor end, it would have to be their M25 or M32. The M25 & M32 refers
to the thread on the end. 
One problem is the bulkiness of the cable connectors. You would have to have the connections on the 
2 or 4 wires staggered, so this may dictate the length of extension tube connecting to the stub on the motor.
I doubt you would be able to pull the connectors + wires through the globe even on the M32 version. 
To change motors in the Field you would loosen the blue globe so the cable doesn't twist & unscrew the 
blue globe cable gland & pull the wiring out of the extension tube. The barrel type wire connectors with grub screws I think 
would be the lowest profile & highest amp rating connector available. These would probably need to be 
shrink wrapped over  several times to get to G.L. insulation standards.
If we went with a hull penetrator on one end of the cable & connector on the other that could plug in to a
connector on the motor, then changing motors would be easy, but if you wanted to route the wires through
anything then you would have to cut a 46.5mm hole for the connector to fit through, rather than an 18.2 mm
for  the cable. Another thought was to add a T intersection in there some how, to recieve an air line.
Alan

________________________________
 From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Wednesday, July 30, 2014 10:15 PM
Subject: Re: [PSUBS-MAILIST] MK-101 Connectors

David & Cliff
was thinking that if we used the 4 pin high power connector,
http://macartney.com/sites/default/files/brochures/SubConn_High_Power_4pins_0.pdf

then the 2 spare pins could have a thermister on them measuring the motor temperature 
as you were intending to do David.
The HPBH4M "male" fitting on the motor would mean you would have as Cliff suggested, the safety feature
in that if the male & female came apart the live end would be female & wouldn't short on anything
(apart from water).
I am wondering if there is any off the shelf adapter we could use to screw this straight on to the motor wiring outlet.
Also is it feasable to attach bayonets or whatever to the pigtails (does it have pigtails) to fit them directly to the motor electrics.
Can this be done while the motor is apart & then be put back together?
Any thoughts?
Cliff, are you intending to use the saltwater motor controller?
http://www.minnkotamotors.com/advantage/saltwater.aspx?sectionID=3

Alan

________________________________
 From: Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Sent: Wednesday, July 30, 2014 12:07 PM
Subject: Re: [PSUBS-MAILIST] MK-101 Connectors

Cliff, see my previous note to Alan.  Forget the subconn site, go
      through the Macartney site at
http://macartney.com/systems/infrastructure/subconn%C2%AE

SubConn does have a true 50amp per pin connector but it has four
      pins with a max connector rating of 200 amps, model HPBH4.  They
      don't show a two pin model but maybe we should ask if they can
      produce it for us.

And for the classification discussion, they make a one pin monster
      power connector rated for 250 amps.

Jon

On 7/29/2014 6:15 PM, Cliff Redus via Personal_Submersibles wrote:

Jon, this link seems to be broken at psub site.
>
>
>If you look at http://www.subconn.com/power-series-list-available-types, I don't see a part number associated with a 50A version of BHB2M.  There is a 50A 4 pin model HPB4M but this has a larger body and no option for 2 pin.
>
>
> Lets assume Subconn has a Hi-Power version of BHB2M.  For the sake of argument, lets call it BHB2M*  .  If I understand what the Subconn rep said, the BHB2M* connector overall rating is 50A so if we connect to a MK-101 lower unit, and we run the motor at max load, then we would see 46 A in teach wire / pin.  For non commercial personal applications I can live with this as they have a big factor of safety but for those that are trying to get their boat classed, this is not going to work as classing agencies like ABS and Lloyds specify that parts like these have to operate within vendor specifications.  They would need a connector rating of 100A, i.e., 50A per pin if I am understanding this.
>
>
>

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