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Author Topic: Wiring Diagram (Fuse?)  (Read 1857 times)

tizdaz

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Wiring Diagram (Fuse?)
« on: November 18, 2016, 02:19:39 AM »

Hiya guys :)


ok below is my wiring diagram for 4x 12v 20Ah batterys in series wired up to an A.Electronics P103 Parallel board so it gives total output of 24 Volt & 44Ah. The actual Diagram is what A.Electronics sent me for wiring up my modified P103 board.


Ive marked on the diagram all the connectors which are (blue) colour as I will be placing/removing the batterys during transportation of my tug & ive also marked 2 fuses (green) colour & finally a main power on/off switch in purple


First off, have i placed the fuses & power switch in correct places?
Secondly, what amp fuses should i use?





Also when i remove or fit the batteries, should i disconnect/connect the leads in a certain order or wont it matter?


Thanks guys :)

tizdaz

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Re: Wiring Diagram (Fuse?)
« Reply #1 on: November 18, 2016, 02:58:17 AM »

forgot to say, for charging each battery will have a seperate charging lead for obvious reasons! :)

colin-d

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Re: Wiring Diagram (Fuse?)
« Reply #2 on: November 18, 2016, 05:22:08 AM »

personally I would put the fuses between the motors and ESC's....
so if the motor draws more Amps than the speed controller can handle, it will not blow the ESC...!!

so to that effect if the speed controller could handle 20 Amps I would probably insert a 15 Amp fuse...

but then again I don't use Hi Ampère motors...

but this is only my opinion ...
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tizdaz

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Re: Wiring Diagram (Fuse?)
« Reply #3 on: November 18, 2016, 06:11:01 AM »

Hi colin, thanks for reply :)


The ESC im going to use the high voltage one from Action Electronics (P98)heres the specs:
Motor voltage 12v Min; 32v Max Motor Current 30A Max Continuous; 140A Surge
http://www.action-electronics.co.uk/pdfs/P98.pdf


Think the max my motor is going to pull is around 8Amp (except for surges). But like i say, this is all new territory for me! so the more info i get the better :)


Thanks again!

NFMike

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Re: Wiring Diagram (Fuse?)
« Reply #4 on: November 18, 2016, 09:28:29 AM »

I think the diagram is basically correct. It is vital to have fuses close to the batteries.
Most modern escs have built in overload protection, so a fuse down there is probably overkill (and introduces another potential failure point), but if you're neurotic you can put another fuse between esc and motor in addition to the battery fuses.

malcolmfrary

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Re: Wiring Diagram (Fuse?)
« Reply #5 on: November 18, 2016, 10:02:17 AM »


personally I would put the fuses between the motors and ESC's....
so if the motor draws more Amps than the speed controller can handle, it will not blow the ESC...!!


so to that effect if the speed controller could handle 20 Amps I would probably insert a 15 Amp fuse...


but then again I don't use Hi Ampère motors...


but this is only my opinion ...
A great many ESCs have their own current limiting/protection, the only time that fuses between ESC and motor is when there are multiple motors off one ESC when they act as protective distribution, otherwise they are a fault in waiting.  The purpose of the fuse between battery and ESC is to protect the boat against an internal problem inside the ESC. 


Disconnecting/reconnecting car size batteries.  Electrically, it doesn't matter, but when unhooking my car battery I always went negative (ground line) first.  This was because handling the terminals meant waving a spanner around that was connected to the battery.  Accidentally earthing the neg was no problem.  Neither was earthing the positive if there was no circuit due to the negative connection not being there.
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NFMike

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Re: Wiring Diagram (Fuse?)
« Reply #6 on: November 18, 2016, 11:22:40 AM »

Having had a bit more think and poke I reckon 14 awg will probably be OK with a 15A fuse in the feed from each battery. The wires on the battery side of the fuses, and the battery terminals, must be well insulated and protected from damage as they are not protected by the fuses. Also, the plugs you use for the batteries must be rated for 15-20A, and the one between the batteries also needs to be 'proofed' against accidental short-circuiting when unplugged, e.g. well shrouded.

If you decide to fuse the motor as well then a 15 should be OK there too. Obviously any sub-circuits for lights, etc, should be fused appropriately for their use/wiring - I think Action do a little board to cater for that as well.

If this sounds overkill just bear in mind that your proposed set up is sufficient to start a car - i.e. It can probably deliver several hundred amps, maybe even a thousand or more, into a fault. The results would not be pretty - the cost of a few fuses is minimal in a model this big (ha'peth of tar, etc  :-)  ).

tizdaz

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Re: Wiring Diagram (Fuse?)
« Reply #7 on: November 18, 2016, 06:33:41 PM »

hiya guys :)


First off, no such thing as overkill when it comes to safety! So your advice is all good :)


As advised, i will go with 14 Awg for the batteries & the link from the P103 to the ESC & then from the ESC to Motor.


Also im thinking of using a seperate 12v battery for steamer uint & LED's etc, what awg should i use for them would you say?


Thanks again :)



malcolmfrary

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Re: Wiring Diagram (Fuse?)
« Reply #8 on: November 19, 2016, 09:42:36 AM »

The chances are that you got more length of wire than was needed for the main wiring.  It will be more than adequate, just use that.
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tizdaz

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Re: Wiring Diagram (Fuse?)
« Reply #9 on: November 19, 2016, 04:16:19 PM »

oki doke thanks :)


yeh it comes in meter lengths.
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