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.
Advanced RCD820
The RCD820 series is suitable for use in applications with exacting technical requirements:
●
High residual current response values
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Long delay time settings for selective grading
●
Onboard interface to a fieldbus communication system
●
Graded alarm system
Features
The key features of the RCD820 series are:
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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
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Auxiliary contacts for tripped signals and pre-alarms
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With remote acknowledgement and remote commissioning capability
●
Remote tripping possible via communication link or auxiliary contact
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Suitable for use in 1-phase and 3-phase systems
●
Suitable for use as a display unit only
