SIEMENS
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Siemens IC 10 · 2017
Motor Starter Protectors/Circuit Breakers
SIRIUS 3RV2 Motor Starter Protectors/Circuit Breakers
3RV29 infeed system
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Overview
The 3RV29 infeed system is a convenient means of energy
supply and distribution for a group of several motor starter
protectors or complete load feeders with screw or spring-type
terminals in sizes S00 and S0. Motor starter protectors or load
feeders with a rated current of maximum 32 A each can be used.
3RV21, 3RV27 and 3RV28 motor starter protectors/circuit
breakers cannot be deployed in this system.
The system is based on a basic module complete with a lateral
incoming unit (three-phase busbar with infeed). This infeed with
spring-type terminals is mounted on the right or left, depending
on the version, and can be supplied with a maximum conductor
cross-section of 25 mm
2
(with end sleeve). A basic module has
two sockets onto each of which a motor starter protector can be
snapped.
Expansion modules (three-phase busbars for system expan-
sion) are available for extending the system. The individual
modules are connected through an expansion plug.
The electrical connection between the three-phase busbars and
the motor starter protectors is implemented through plug-in
connectors. The complete system can be mounted on a TH 35
standard mounting rail to IEC 60715, and can be expanded as
required up to a maximum current carrying capacity of 63 A.
The system is mounted extremely quickly and easily thanks to
the simple plug-in technique. Thanks to the lateral infeed, the
system also saves space in the control cabinet. The additional
height required for the infeed unit is only 30 mm. The alternative
infeed possibilities on each side offer a high degree of flexibility
for configuring the control cabinet: Infeed on left-hand or right-
hand side as well as infeed on one side and outfeed on the other
side to supply further loads are all possible. A terminal block with
spring-type connections in combination with a standard mount-
ing rail enables the integration of not only SIRIUS motor starter
protectors but also single-phase, 2-phase and 3-phase compo-
nents such as 5SY miniature circuit breakers or SIRIUS relay
components.
The 3RV29 infeed system is approved in accordance with IEC to
500 V. It is also UL-approved and authorized for "Self-Protected
Combination Motor Controller" (Type E starter) as well as for
Type F starter (Type E starter + contactor).
SIRIUS 3RV29 infeed systems
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2
3a
4
6
5
7
3b
8
6
6
7
8
1
2
3a
3b
4
5
Terminal block for device infeed
3-phase busbar with infeed
3-phase busbar for system expansion
Expansion plug
Extra-wide expansion plug
Plug-in connector
Contactor base
Terminal block
End cover
IC01_00634
© Siemens AG 2016