SIEMENS
7/40
Siemens IC 10 · 2017
Motor Starter Protectors/Circuit Breakers
SIRIUS 3RV2 Motor Starter Protectors/Circuit Breakers
Accessories
Busbar accessories
7
■
Overview
Insulated three-phase busbar system
Three-phase busbar systems provide an easy, time-saving and
clearly arranged means of feeding 3RV2 motor starter
protectors/circuit breakers with screw terminals. Different
versions are available for sizes S00 to S2 and can be used for
the various different types of motor starter protectors/circuit
breakers (size S0 up to 32 A).
The 3RV1915 and 3RV1935 three-phase busbar systems are
generally unsuitable for the 3RV21 motor starter protectors for
motor protection with overload relay function and 3RV27 and
3RV28 circuit breakers according to UL 489/CSA C22.2 No. 5.
The busbars are suitable for between two and five motor starter
protectors/circuit breakers. However, any kind of extension is
possible by clamping the tags of an additional busbar (rotated
by 180°) underneath the terminals of the respective last motor
starter protector/circuit breaker.
A combination of motor starter protectors/circuit breakers of size
S00 and S0 is possible. The motor starter protectors/circuit
breakers are supplied by appropriate infeed terminals.
SIRIUS three-phase busbar system size S00/S0
SIRIUS three-phase busbar system size S2
The three-phase busbar systems are finger-safe. They are
designed for any short-circuit stress which can occur at the
output side of connected motor starter protectors/circuit
breakers.
The three-phase busbar systems can also be used to construct
"Type E Starters" according to UL/CSA. Special infeed terminals
must be used for this purpose, however
(see "Selection and
ordering data", page 7/41)
.
8US busbar adapters for 60 mm systems
The motor starter protectors/circuit breakers are mounted di-
rectly with the aid of busbar adapters on busbar systems with
60 mm center-to-center clearance in order to save space and to
reduce infeed times and costs.
Busbar adapters for busbar systems with 60 mm center-to-
center clearance are suitable for copper busbars with a width of
12 mm to 30 mm. The busbars can be 5 mm or 10 mm thick.
The motor starter protectors/circuit breakers are snapped onto
the adapter and connected on the line side. This prepared unit
is then plugged directly onto the busbar system, and is thus
connected both mechanically and electrically at the same time.
For further busbar adapters for snap-mounting direct-on-line
starters and reversing starters as well as additional accessories
such as incoming and outgoing terminals, flat copper profile
etc.,
see Catalog LV 10
.
SIRIUS load feeders with busbar adapters snapped onto busbars
NSB0_02079c
3RV1915-6AB
3RV2915-5B
3RV2925-5AB
3RV1915-1CB
3RV2935-5A
3RV1935-6A
3RV1935-1A
NSB0_01074e
3RV1935-1C
NSB0_02080a
© Siemens AG 2016