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Melting EC5 connector

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  • #1

    Melting EC5 connector

    Well that's a new one on me. Popped out for a couple of flights with my TRex 550 DFC. All okay until I finished flying and then could not disconnect the battery from the speed controller. After much pulling I managed to get it disconnected but it is clear to see that the blue plastic on the battery end had melted. I can only assume that it must have been arcing a bit but I've never heard of that before. Going to change all my connectors before I fly again
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  • #2
    Wow not heard of it myself they are rated very high so being used on a 550 should not have caused that, check your solder joint just in case it's causing a bit of resistance at that point, resistance = heat,

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    • #3
      Solder joints seem to be fine. I always felt that they were a bit slack and easy to push on but I checked this with the supplier and they said this was normal. I had changed from Deans so had no experience of how tight they should be. Anyway, glad it didn't cause the 3gx to brown out and I will change all connectors before the next flight.

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      • #4
        The battery side connector of EC5s is just a hollow cylinder. The heli side has the springed fingers that are responsible for contact pressure, IIRC.
        I would have thought it's more likely you need to replace the connector on the heli TBH.
        Last edited by dillwhacker; 12-07-2014, 01:02 PM.
        Trev
        Lots of different things that fly
        And happy to have FOUR shiny EGS

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        • #5
          Don't blame you in the slightest,

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          • #6
            Just poor contact, just replace it but check both sides. If burn marks on the other side I'd replace that to.
            Logo 550SX VBar Neo
            T-Rex 600N DFC VBar
            Logo 690SX VBar Neo
            T-Rex G800 Helix Gasser VBar
            T-Rex HB7RC 800 HeliBug Gasser DFC VBar Neo

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            • #7
              Just bought some rcproplus supra x pro d connectors 6mm and 4mm for my helis they lock into each other. they feel really good and solid and really easy to solder up. Bought from rc711. Videos on YouTube.

              My ec5 were loose sometimes. They cost a little more but how much would a short and fire cost if they went wrong...

              And they are reusable not like the ec5 connectors
              Last edited by Gavalar; 12-07-2014, 01:26 PM.
              sigpic
              Controlled
              Warp 360 / Compass 6HVu               /Trex 600n DFC
              HD Cell 500


              Youtube Channel - http://www.youtube.com/user/GavalarWright/videos

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              • #8
                i use castle connectors, big beefy and work fine
                Spektrum IX12
                Blade Inductrix
                T-Rex 150X
                T-Rex 450L, Heli Option Turn-buckles, carbon push rod, 6s, Stock Electrics, Giant Power Lipos
                Goblin 380 Kyle Stacy, 360mm, 6s, AR7210BX, Align 430m/525m @ 6.0v, Castle Talon 90, Scorpion 3020-1000, Optipower 2700 30c
                Goblin 570 Carbon Red, Stretched to 600mm, Blackline 3D Blades, 12s, BD 3SX, Align 800/850 HV servos @ 8.0v Castle 120 Phoenix Edge HV, Scorpion, Thunderpower G8s
                T-Rex 800e Pro DFC, Hobbywing 200A, 760x Head, BeastX

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                • #9
                  If you use EC5's try and get them all from the same place, I know they're supposed to be compatable but there are fractional differences between manufacturers. Could easily cause the problem you describe. I only use HK ones since they are a quid or so a pair. Been flawless so far.
                  D
                  Last edited by maddog7; 12-07-2014, 01:26 PM.
                  .......unless otherwise stated, all opinions are my own.

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                  • #10
                    Originally posted by maddog7 View Post
                    I only use HK ones since they are a quid or so a pair. Been flawless so far.
                    D
                    I've used the same HK ones on my 550, been great.
                    Nano CPX
                    Trex 450 Pro DFC - 3GX
                    Trex 550E DFC - Vbar mini
                    Logo 550SX - Vbar mini
                    Goblin 570 -Spartan VX1n
                    TBS Discovery Pro

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                    • #11
                      Originally posted by Gavalar View Post
                      Just bought some rcproplus supra x pro d connectors 6mm and 4mm for my helis they lock into each other. they feel really good and solid and really easy to solder up. Bought from rc711. Videos on YouTube.

                      My ec5 were loose sometimes. They cost a little more but how much would a short and fire cost if they went wrong...

                      And they are reusable not like the ec5 connectors
                      They look excellent! Much less guesswork in the soldering than EC5's, as long as the clips dont easily come off they're a great design.
                      If I didn't have 30 odd EC5 shod batts etc I'd have to give them a shot!
                      .......unless otherwise stated, all opinions are my own.

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