Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
392 Manual, 03/2019, A5E03603177010-03
A special "ADVANCED" residual current device has been developed for use with 3VA2
molded case circuit breakers.
The RCD820 series is suitable for use in applications with exacting technical requirements:
● High residual current response values
● Long delay time settings for selective grading
● Onboard interface to a fieldbus communication system
● Graded alarm system
The key features of the RCD820 series are:
● Residual current devices available with ratings up to 630 A
● Type A
● Response current I
Δn
adjustable in ten steps from 0.03 A to 30 A
● Delay time Δt adjustable in ten steps from 0 to 10000 ms
● 3 and 4-pole versions
● LEDs to signal "ready" state, pre-alarms and communication status
● Auxiliary contacts for tripped signals and pre-alarms
● With remote acknowledgement and remote commissioning capability
● Remote tripping possible via communication link or auxiliary contact
● Suitable for use in 1-phase and 3-phase systems
● Suitable for use as a display unit only
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