Accessories
4.8 Residual current devices
3VA molded case circuit breakers with IEC certificate
Manual, 03/2019, A5E03603177010-03
395
Residual current devices for mounting on circuit breakers
The RCD310, RCD510, RCD320, RCD520, RCD520B and RCD820 residual current devices
are available as accessories for mounting on specific 3VA molded case circuit breakers up to
the largest circuit breaker size/current rating.
Combination with circuit breakers
After a residual current device has been mounted on a molded case circuit breaker or switch
disconnector, the specifications of the breaker or disconnector remain unchanged with
respect to the following characteristics:
● Standards
● Conductor cross-sections
● Use of connection accessories
● Isolating features
● Selective behavior
When a basic type residual current device is mounted on a 3VA1 molded case circuit
breaker or a 3VA1 switch disconnector, the electrical rating of the equipment combination is
automatically downgraded to the lower electrical rating of the residual current device.
Example:
U
e
: 3VA1 ≤ 690 V AC
3VA1 and Basic residual current device ≤ 480 V AC
For more information, refer to chapter Technical specifications (Page 472).
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