Siemens SIRIUS System Manual

3RV1 circuit breakers
SIRIUS System Manual
2-6
GWA 4NEB 430 0999-02b
2.2.1 General description
Fields of application
The 3RV1 circuit breakers are suitable for:
• Motor and plant protection
• Transformer protection
• Starter protection (short-circuit protection)
The 3RV16 11-0BD10 circuit breaker, frame size S00, is used for fuse moni-
toring.
Releases
3RV1 circuit breakers have:
• Inverse-time delay, thermal overload releases
• Instantaneous short-circuit releases
The overload releases can be set to the load current.
The short-circuit releases are set permanently to 12 times the rated current,
which allows motors to start up without problems. Circuit breakers used for
transformer protection are set to 19 times the rated current to avoid being
tripped by the high inrush current.
When the circuit breakers are tripped, in the case of frame size S00 the tog-
gle switch goes into the tripped position, and in the case of frame sizes S0
to S3 the rotary switch switches to the tripped position. Before it is
switched on again, the rotary switch must be put in the 0 position manually
to avoid switching to the fault inadvertently.
In the case of circuit breakers with a rotary switch, the tripping operation
can also be reported electrically by means of an alarm switch.
Tripping classes
In acc. with IEC 947-4-1:
• Frame sizes S00 to S3: class 10
• Frame sizes S2/S3: class 20
Auxiliary release
The circuit breakers can also be equipped with one of the following auxiliary
releases:
• Shunt release
• Undervoltage release
• Undervoltage release with leading auxiliary contacts
Auxiliary contact ele-
ments
The circuit breakers can be equipped with a transverse auxiliary switch, an
electronically optimized transverse auxiliary switch or a lateral auxiliary
switch (Section 2.4 Accessories).
Shock protection
Shock protection can be improved by covering the terminals and connec-
tions. This can be achieved with the following accessories:
• Frame size S00, S0: protective caps for transverse auxiliary switches
• Frame size S2, S3: terminal covers for box terminals
• Terminal covers for lug and bar connection

Siemens SIRIUS Specifications

General

Product brand name	Siemens
Series	SIRIUS
Coil Voltage	24V DC, 110V AC, 230V AC
Switching Capacity	Up to 10A
Mounting Type	DIN rail
Product designation	SIRIUS
Contact Material	Silver alloy
Contact Rating	Varies depending on the specific SIRIUS relay model (e.g., 6 A at 250 V AC, 10 A at 250 V AC)
Switching Voltage	Varies depending on the specific SIRIUS relay model (e.g., 250 V AC, 400 V AC)
Mechanical Life	Up to 10 million operations
Electrical Life	Up to 100, 000 operations
Operating Temperature	-25°C to +55°C
Protection Class	IP20
Size of relay base	Varies depending on the specific SIRIUS relay model