Any one please suggest that what's the particular reason of my ESC which exploded during the test run of motor and servos.

During installation I had used following configuration:
1. Towerpro 2409/18 brushless motor.
2. DYS 30 AMP brushless ESC.
3. Turnigy 2500mah 25C 3S lipo battery.
4. HXT900 9gm servos.
5. Futaba 6EXP Transmitter.

I would like to remind you that I was connecting right power supply i.e. positive to positive and negative to negative for joining ESC & battery.
After connecting power supply, ESC was not beeping and get exploded in 2-3 seconds.

Please help me to find out what is the possible cause for that mishap. So that I will never do such wrong action in future.

Can you clarify the part about connecting the "power supply" to the ESC ?  Normally one would connect the lipo battery to the ESC, so the big question is whether you were using any external "power supply" ?

Most likely you had some part of the connection wrong.  The overall connection setup should look like this :

http://www.rcindia.org/electric-power/my-esc-and-motor-burnt/?action=dlattach;attach=618172

Thanx for the reply Anwar

I would like to know you that I was connected it in the same manner as you display in photo. But I don't know what happened exactly.

I guess my possible error is:-

1. Connecting wrong wire goes into receiver from ESC.
2. When I opened the ESC shrink tube I noticed that a little amount of moisture in ESC's heat shrink.
3. My Turnigy 2500mAH lipo's manufacturing defect.

My question is that what is the possible error of frying the ESCs?

Just to double check... in your first post, you mean the "lipo" when you said "power supply" ?

Also, was this the very first time you used this ESC ?

If you connection is per the diagram I pointed to, then I am not sure how the "connecting wrong wire goes into receiver from ESC" can happen.  Like I said before, it is most like due to wrong connections. It can happen (but is pretty rare) that the ESC was defective, that is why asked about whether this is the first time you used it.

how about uploding a simple diagram (using MS paintbrush) as to how you connected everything together..

Quote from: chanduvcrc on July 30, 2010, 05:00:22 PM
2. When I opened the ESC shrink tube I noticed that a little amount of moisture in ESC's heat shrink.

Water and electronics don't mix. How did the moisture get there ?

I was avoiding this thread because of the words blast and explosion. That would scare off any newbies and people  who are not familiar. ESC is just an electronic device and doesn't contain anything that can explode. Worst case, the electrolytic caps can pop off if you apply reverse polarity. Suggest you edit the post after you have come to terms with your loss.

This is a simple paint brush diagram for helicopter setup.
I hope it helps.

Dorwin.

Dont mind the LIPO value! It was printed for my personal use!

chanduvcrc, can you post a diagram of your setup like controlflyer has posted? We may be able to help you diagnose the problem..

Quote from: chanduvcrc on July 30, 2010, 05:00:22 PM
1. Connecting wrong wire goes into receiver from ESC.

This should not cause a problem, It just powers the reciever and listens for the signal from that channel. As Rajesh said, the polarity might be wrong. Also by mistkae the company might have soledered the wire wrong internally. battery wont be a problem.

Just wondering if there was a short inside the motor coils that might have overloaded the ESC. Just my 2 cents.

Quote from: RotorZone on July 30, 2010, 07:02:37 PM
Water and electronics don't mix. How did the moisture get there ?

The big question is... is it really moisture ?  Can it be melted glue of some kind or even part of the stuff inside capacitors ?

Fellas..... Sorry for my confusing & dreadful language like blast. It was the capacitor which pop off. But friends I am a newbie and even a small pop off in electronics feels like "blast" to me.

Anwar dear, power supply means its just the lipo and you are right I examined the ESC thoroughly and it is some kind of paste inside the capacitor which spread out when capacitor pops off .

I had used this ESC about 8-10 flight in my Tigermoth 400. Now I wanted to use it in my newly built pipercub.

Here is my design and original photographs of electronics as connected before accident.

Tell me if I connect the ESC's triwire (red+black+white) into the receiver wrongly (means if black wire connects into the signal point of receiver instead of negative point) then it is possible to fry the ESC within seconds?

If so, then that was the possible reason of frying my ESC. Because I don't know how to sort out which point is "signal" in receiver.

In your first set of pictures the polarity is wrong.

In the second set it seems to be proper.

as rotorzone states the polarity is wring in teh fist set of pics... the white colour is the signal wire and sometimes the esc / servos have orange, red and brown wires, then orange is the signal side...if you place the servo wires reverse from the esc to the rx nothing will happen to the esc or the rx

Quote from: chanduvcrc on July 30, 2010, 11:09:02 PM
Fellas..... Sorry for my confusing & dreadful language like blast. It was the capacitor which pop off. But friends I am a newbie and even a small pop off in electronics feels like "blast" to me.

Anwar dear, power supply means its just the lipo and you are right I examined the ESC thoroughly and it is some kind of paste inside the capacitor which spread out when capacitor pops off .

I had used this ESC about 8-10 flight in my Tigermoth 400. Now I wanted to use it in my newly built pipercub.

Here is my design and original photographs of electronics as connected before accident.

hi,
1.   i think the only problem may have been the moisture, if the heat shrink on the esc was transparent, u will see the moisture, and in that case there would have been moisture on the circuit board which would not be visible, dry it out first and only then power up.
2.   As far as the esc connection to motor is conserned, u can connect the 3 wires any which way, does not matter, and if u find the prop rotating in the wrong direction, just interchange any 2 wires and the prop will rotate correctly.
3.    Esc to Rx, simple, only 2 codes being used, black red white, so white is signal, and brown red orange, so orange is signal, and on the rx, if tutaba, u will find a notch on one side of all connector inputs, that is the signal side. and in Jr or spectrum type, the rx body has printed signs -, +, and sighnal which is a wave form looking like a horizontal s.
4.    ESC to Batt, u had better be 1000% correct every time u connect.
5.   One precaution, always connect the lipo last, and disconnect lipo first.after motor and rx have been connected to the esc.
6.   If there was no moisture, then probabily u just got a bad esc, sheer bad luck.
7.   only one other probability remains, that the windings in the motor have been wrong at manufacture, which u will only come to know when u put a new ESC and it too blasts soon after power up.
8.   There have however been case where a 14 turn motor has actually only 10 turn, during manuf, the labeling must have got mixed up or just got wired wrong. Same motor bodies are use with the familiy, say 2204, 8t or 10t, or 12t will use the same body, only the labelling is different for different turns.
9.  In all probability moisture was the cause.
10.   Finally, all the best, and if u Delhi, come home.
Ramesh Tahlan

Got it guys

"Might be it was happen due to wrong polarity" as many user said.

Thanx for the suggestions.

hi chanduvcrc,
since u in lucknow, u must be knowing Vibhu, he also in lucknow, and btw, i did my school upto 9th at LaMartinere.
regards
Ramesh Tahlan

Thanx ramesh.

As you illustrate in written matter.

I would also like to post some links which are very helpful to newbie for the first time electronic installation.

Part 1:
http://www.youtube.com/watch?v=48MQR3UV7x0&feature=related

Part 2:
http://www.youtube.com/watch?v=Mi5j2xOt33o&feature=related

Part 3:
http://www.youtube.com/watch?v=VjhQ5c2LDFc&feature=related

With best regards
Chandra Sekhar
Lucknow