Hello I have installed a 100amp contactor in a generator control system I have designed tested and installed
its a simple basic design
two 230v ac contactors controlled individually by 12v 250v contact relays (12v relay used to get away with a cat5 between shed and house) and to change it all over a 230v coil Dp dt relay so when the generator is running the supply is disconnected and the house runs off the generator regardless wether the mains is live or not and disconnects when the generator is off to protect the generator
but the issue I'm having is the contactor on the mains side is humming or buzzing (how ever you would like to put it)
quickly got a app for an idea of how loud the noise is and got arround 30-40 db
the contactor is a abb b50 100a contactor it doesn't do much switching it's pretty much engaged all the time and when i press hard on the test button for dead testing the hum reduces, it's defiantly not arcing
is there a way I can reduce the noise?
Thanks bernie
its a simple basic design
two 230v ac contactors controlled individually by 12v 250v contact relays (12v relay used to get away with a cat5 between shed and house) and to change it all over a 230v coil Dp dt relay so when the generator is running the supply is disconnected and the house runs off the generator regardless wether the mains is live or not and disconnects when the generator is off to protect the generator
but the issue I'm having is the contactor on the mains side is humming or buzzing (how ever you would like to put it)
quickly got a app for an idea of how loud the noise is and got arround 30-40 db
the contactor is a abb b50 100a contactor it doesn't do much switching it's pretty much engaged all the time and when i press hard on the test button for dead testing the hum reduces, it's defiantly not arcing
is there a way I can reduce the noise?
Thanks bernie