SIEMENS
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Siemens IC 10 · 2017
Motor Starter Protectors/Circuit Breakers
SIRIUS 3RV2 Motor Starter Protectors/Circuit Breakers
Accessories
Rotary operating mechanisms
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Overview
Door-coupling rotary operating mechanisms
Motor starter protectors/circuit breakers with a rotary operating
mechanism can be mounted in a control cabinet and operated
externally by means of a door-coupling rotary operating mecha-
nism. When the cabinet door with motor starter protector/circuit
breaker is closed, the operating mechanism is coupled. When
the motor starter protector/circuit breaker closes, the coupling is
locked which prevents the door from being opened unintention-
ally. This interlock can be defeated by the maintenance person-
nel. In the OPEN position, the rotary operating mechanism can
be secured against reclosing with up to three padlocks. Inadver-
tent opening of the door is not possible in this case either.
SIRIUS 3RV2926-0K door-coupling rotary operating mechanism
SIRIUS 3RV2926-2B door-coupling rotary operating mechanism for
arduous conditions
Remote motorized operating mechanisms
3RV motor starter protectors are manually operated switching
devices. They automatically trip in response to an overload or
short circuit. Intentional remote-controlled tripping is possible by
means of a shunt release or an undervoltage release. Reclosing
is only possible directly at the motor starter protector/circuit
breaker.
The remote motorized operating mechanism allows the motor
starter protectors/circuit breakers to be opened and closed by
electrical commands. This enables a load or an installation to be
isolated from the network or reconnected to it from an operator
panel.
If the motor starter protector/circuit breaker is tripped as a result
of overload or short circuit, it will be in the tripped position. For
reclosing, the remote motorized operating mechanism must first
be set manually or electrically to the 0 position (electrically by
means of the Open command). Then it can be reclosed.
The remote motorized operating mechanism is available for
motor starter protectors/circuit breakers in size S3 for control
voltages of 230 V AC and 24 V DC. The motor starter protector/
circuit breaker is fitted into the remote motorized operating
mechanism as shown in the drawing.
In the "MANUAL" position, the motor starter protector/circuit
breaker in the remote motorized operating mechanism can
continue to be switched manually on site. In the "AUTOMATIC"
position, the motor starter protector/circuit breaker is switched
by means of electrical commands. The switching command
must be applied for a minimum of 100 ms. The remote motorized
operating mechanism closes the motor starter protector after a
maximum of 1 s. On voltage failure during the switching opera-
tion it is ensured that the motor starter protector/circuit breaker
remains in the "OPEN" or "CLOSED" position. In the "MANUAL"
and "OFF" position, the remote motorized operating mechanism
can be locked with a padlock.
RESET function
The RESET button on the motorized operating mechanism
serves to reset any 3RV2921-1M signaling switch that might be
installed.
SIRIUS 3RV1946-3A.. remote motorized operating mechanism
NSB0_01078a
NSB0_01079b
NSB0_00007b
© Siemens AG 2016