Forum Discussion
MrWizard
Dec 19, 2016Moderator
A 50 amp transfer switch uses (2) three pole relays
Some new coils are DC with a rectifier control board, eliminates humming
The older versions all use 120v coils in the relays
The really good ones have mechanical interlock between the two contactors, do only one can pull in at any time
"Todd" Transfer switches were Built that way
Finding a single replacement part could be hard to do
Some new coils are DC with a rectifier control board, eliminates humming
The older versions all use 120v coils in the relays
The really good ones have mechanical interlock between the two contactors, do only one can pull in at any time
"Todd" Transfer switches were Built that way
Finding a single replacement part could be hard to do
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