I am getting ready to install a Victron Multi Plus 3K unit. I am using the current transfer switch for the shore vs generator power on a Winnebago Travato. The MultiPlus specifies the use of a magnetic or fuse breaker on the AC input side. Do I still install a breaker between the transfer switch and AC input or will the ATS provide the necessary protection? This is a 30 amp system.
A switch that is used to transfer power supply automatically from its main source to a backup power source once it detects a power outage within the main source is known as an automatic transfer switch or ATS. Whenever a power outage occurs within the main power system, then this switch invokes a standby power source like a UPS or uninterruptible power supply.
Once the automatic transfer switch is connected to both primary & backup power sources, then it acts as an electrical relay to serve as a mediator between equipment as well as the power supplies.
It's probably a good idea to have a breaker ahead of the Multi's AC input (after the ATS). If the ATS has internal breakers of suitable size then you might get away without one between the ATS and the Multi.
