Tripped breaker while running Transformer test

[miesahead]

:-[

Hi everyone

While running the Power Transformer Secondary Test, the circuit breaker tripped in my apts. main electrical box.

There was a slight smell of burnt in the air, but the fuse does not look burnt at all.

I am doublechecking all my solders, but wanted to hear if anyone had any guidance/advice?

Safe to plug in after I re-check all the solders? Or any other diagnostics I should run?

 

[Paul Birkeland]

I would post some photos of your build so far.

-PB

 

[miesahead]

Thanks for taking a look! (my voltage is 220v)

 

[Paul Birkeland]

What was your measured powerline voltage?

 

[miesahead]

Hi!
This is what I got during that step: 213v

 

[reglys]

Hi Milesahead

Disconnect your power cord from the Crack. Put your multimeter in Ohms reading. Clip the black probe to the ground tab and use your red probe to check L on IEC module , N on IEC module, transformer terminal 13 , 14, 16 and 17. Any of those point should measure below 1 ohm. In fact, it should read O/L (open loop).

 

[reglys]

I should have said: None of those points should measure below 1 ohm.

 

[miesahead]

Hi Milesahead

Disconnect your power cord from the Crack. Put your multimeter in Ohms reading. Clip the black probe to the ground tab and use your red probe to check L on IEC module , N on IEC module, transformer terminal 13 , 14, 16 and 17. Any of those point should measure below 1 ohm. In fact, it should read O/L (open loop).

Thanks for the advice.

Confirming I got a OL reading on all the points mentioned above.

I got a non-OL measurement on Pin8 (.4).

 

[reglys]

Pin 8 is connected to the ground tab. It is normal that you have a very low ohm reading.

 

[reglys]

Did your breaker tripped when you were measuring the voltage between pin 7 and 9 or when you were measuring pin 11 and pin 12. Very important that the probe do not touch each other while you are measuring pin 11 and pin 12 otherwise you are shorting the secondary side of your transformer. Same thing while you are measuring pin 7 and pin 9. If the metal of one of your probe is touching pin 8, you are shorting the secondary side of your transfo.

 

[miesahead]

Thanks for the advice and feedback !

After rechecking all my solders and resistance checks, I plugged it in, and got accurate measurements.

Must have been a short I caused with my multimeter somehow.

Now just need to get some replacement LEDs because I broke one  ;D

 

[reglys]

Keep going Milesahead. You will be rewarded at the end. The HLMP-6000 LED is the worst part of soldering.

 

[miesahead]

Keep going Milesahead. You will be rewarded at the end. The HLMP-6000 LED is the worst part of soldering.

Thanks friend. Happy to report my Crack was completed earlier today, and I've been rocking it ever since. Blown away by the sound.

I borrowed a HLMP-6000 from the Speedball kit, and have replacements arriving tomorrow.

I'll save the delight of installing Speedball for the new year