(Topic ID: 182412)

Circuit breaker - Help needed

By jimy_speedt

2 years ago

Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 2 years ago by Atari_Daze
  • Topic is favorited by 1 Pinsider


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    #1 2 years ago


    I am working on a Zaccaria machine. under the playfield, there are 2 fuses 3,15A which protect the solenoid circuit. One of them blows at game start. Because I do not want to blow all my fuses one by one while investigating, I use a circuit breaker 3A soldered on a blown fuse. When measuring between the 2 ends of the fuse, there is continuity, so I presume the circuit breaker is "armed" and operational. Then I insert the assembly in the fuse holder, and start the game. The circuit breaker does not "blow". Instead the 5A fuse further on the Power supply board blows, this fuse is a second line protection level for the Solenoid circuits.

    It means that the 3A circuit breaker has not played it role.

    I am wondering why

    Here attached is a 5A circuit breaker, but it is the exact same brand and assembly as the 3A that I am using.

    Can someone help me ?

    Thank you

    IMG_0001 (resized).JPG

    #2 2 years ago

    Need to check your trip curve for the breaker, typically they are slower to react than fuses, even for a 3 - 5 amp delta.
    CB's are good for some trouble shooting but as you have found, not always.

    #3 2 years ago

    thank you for your reply. Do you recommend another solution, or should I use my fast blow fuses ?

    #4 2 years ago

    No other alternative but to use fuses it sounds like. I would try and locate that short before you go through too many fuses.

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