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What is the difference between type A & AC class RCCB ?

In Class A (Tripping is ensured for sinusoidal, alternating residual currents as well as for pulsed ,DC residual currents, whether they are quickly applied or slowly increased.
Application: loads with electronics, rectifiers, and instruments.)
Class AC Tripping is ensured for sinusoidal, alternating currents, whether they are quickly applied or slowly increased .

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