Considering a soft starter, how to size the line contactor?
The line contactor must be sized in AC-3 category with [...]
Considering a soft starter, how to size the external bypass contactor?
Bypass contactor should be AC-1 rated for the motor full [...]
How to command the line contactor when using a soft starter?
The command of the line contactor is managed automatically by [...]
Considering a soft starter, can I replace its line contactor with a breaker?
Yes, it can be used circuit breaker with undervoltage trip. [...]
What is the purpose of the line contactor for a soft starter? Is it mandatory?
It is a contactor installed upstream the soft starter to [...]
In photovoltaic applications, where are contactors installed?
In the construction of photovoltaic systems, international standards and national [...]
Can BFD contactors be used for applications other than photovoltaics?
BFD contactors are contactors specifically designed to interrupt DC loads. [...]
What is the utilization category of a contactor?
The utilization category specifies the nominal electrical performance of the [...]
How do the performances of a contactor change by connecting the contacts in series or in parallel?
On the contactors the contacts are connected in series to [...]
What is the limit ambient temperature for the correct operation of the contactors?
The standard IEC / EN60947-4-1, referred to the contactor, of [...]
