Accessories
4.6 Motor operators
3VA molded case circuit breakers with IEC certificate
350
Manual, 03/2019, A5E03603177010-03
LOCK
In LOCK mode (slide switch on the right, only possible in the OFF (O) position), the SEO520
motor operator can be interlocked to prevent reclosing. The locking device can be locked
with up to three padlocks (shackle diameter 5.0 mm to 8.0 mm).
Padlocks are not included in the scope of supply.
4.6.3.2
Closing, opening and resetting the 3VA molded case circuit breaker
Closing and opening
In MANUAL mode
In MANUAL mode, the molded case circuit breaker is operated using the buttons on the front
panel of the SEO520 motor operator. Remote control is not possible.
Operating the ON (I) button causes the contacts of the molded case circuit breaker to close.
Operating the OFF (O) button causes the contacts to open. This is not performed by means
of a TRIP. It is an actual switch-off operation.
In AUTO mode
In AUTO mode, the molded case circuit breaker can be closed and opened by means of
electrical signals at the terminal block.
Versions with the communication module can be closed and opened via the connection to
the COM060 communication module in the molded case circuit breaker. This takes place via
the communication environment selected for the 3VA2 molded case circuit breaker, e.g.
PROFIBUS, PROFINET, Ethernet (Modbus TCP). ON/OFF commands can also be issued
via the powerconfig commissioning and parameterization software. Here too, an actual
switch-off operation is performed and not a TRIP.
In AUTO mode, the OFF (O) button on the SEO520 operator can be used. The ON (I) button
cannot be operated.