Office Building Solution

BU I LDI NG SOLUT IONS

19

— RCD

It is important to choose the type of earth leakage circuit breaker according to the type of application and ground fault current that may occur.

Earth leakage circuit breakers are classified into different categories, as follows, according to their ability to provide protection against different types of earth fault currents:

AC differential circuit breaker

Type A differential switch

Type B residual current circuit breaker

The opening of the circuit breaker is ensured for differential sinusoidal alternating currents applied instantaneously or slowly increasing

the opening of the switch is ensured as for the type AC; for unidirectional pulsating currents and for unidirectional pulsating currents, applied instantaneously or slowly increasing

the opening of the circuit breaker is ensured as for type A and in addition for differential sinusoidal alternating currents up to 1000 Hz, for continuous differential currents without ripples, applied instantaneously or slowly increasing.

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