• NOARK Residual Current Circuit Breaker 3-phase 4P 40A 300mA 6kA TypeA (108370)

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Ex9L residual current circuit breakers are designed for residential and industrial applications. Their construction
is based on the classic principle of permanent magnet and polarized relay operation. The advantage of
of such a solution is the independence of protective functions from voltage. The corresponding voltage value is
necessary only during the periodic test of the residual current circuit breaker with the "T" button.
Residual current circuit breakers should be tested regularly every month.