In which applications are the undervoltage trip releases with early make contacts used?
This type of undervoltage trip release has the purpose of [...]
Which is the motor protection circuit breaker behaviour in case of phase loss?
Phase failure is a fault condition that can cause damage [...]
In the technical data of the motor protection circuit breakers, what does “utilization category: A” mean?
The category of use of a circuit breaker is defined [...]
Is it possible to use the motor protection circuit breakers to protect single-phase motors?
Yes, but a simple trick in the wiring must be [...]
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 [...]
