User's Manual

Combination Starters & Starters for Group Installation
SIRIUS 3RA2 Motor Starters
3RV29 infeed system for motor starters
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SIRIUS Innovations Supplement 2011
6
■ Overview
Types of infeed for 3RA2 motor starters
On the whole, four different power infeed possibilities are
available:
• Parallel wiring
• Use of insulated three-phase busbars (combination with
SIRIUS motor starter protectors and contactors possible)
• 8US busbar adapters for 60 mm systems
• SIRIUS 3RV29 infeed systems
Insulated three-phase busbar systems
Three-phase busbar systems provide an easy, time-saving and
clearly arranged means of feeding 3RA2 motor starters with
screw terminals. Different versions are available for sizes S00
and S0 and can also be used for the various different types of
motor starter protectors.
The busbars are suitable for between 2 and 5 starters. However,
any kind of extension is possible by clamping the tags of an ad-
ditional busbar (rotated by 180°) underneath the terminals of the
respective last motor starter protector.
A combination of starters of different sizes is possible with sizes
S00 and S0. Connecting pieces are available for this purpose.
The motor starter protectors are supplied by appropriate starter
terminals.
Three-phase insulated busbar system size S00/S0
The three-phase busbar systems are finger-safe. They are de-
signed for any short-circuit stress which can occur at the output
side of connected motor starter protectors.
The three-phase busbar systems can also be used to construct
"Type E Starters" of size S0 or S2 according to UL/CSA. Special
type E terminals must be used for this purpose however.
For selection and ordering data see Chapter 5 "Protection
Equipment" --> "SIRIUS 3RV2 Motor Starter Protectors up to
40 A" --> "Accessories" --> "Busbar Accessories".
8US busbar adapters for 60 mm systems
The motor starters are mounted directly with the aid of busbar
adapters on busbar systems with 60 mm center-to-center clear-
ance in order to save space and to reduce infeed times and
costs.
The busbar adapters for busbar systems with 60 mm center-to-
center clearance are suitable for copper busbars with a width of
12 to 30 mm. The busbars can be 5 mm or 10 mm thick.
The starters are snapped onto the adapter and connected on
the line side. This prepared unit is then plugged directly onto the
busbar system, and is connected both mechanically and electri-
cally at the same time.
For "Selection and ordering data" see page 6/27.
Motor starters with busbar adapters snapped onto busbars
SIRIUS 3RV29 infeed systems
The 3RV29 infeed system is a convenient means of energy sup-
ply and distribution for a group of several motor starter protec-
tors or complete motor starters with a screw or spring-type con-
nection up to size S0.
The system is based on a basic module complete with a lateral
incoming unit (three-phase busbar with infeed) which has two
slots.
Expansion modules are available for extending the system
(three-phase busbars for system expansion).
For 3RV29 infeed system see Chapter 5 "Protection Equipment"
--> "SIRIUS 3RV2 Motor Starter Protectors up to 40 A"
--> "Accessories" --> "3RV29 Infeed System".
NSB0_02079
3RV19 15-6AB
3RV29 15-5B
3RV29 25-5AB
3RV19 15-1CB
NSB0_02080
© Siemens AG 2011