SIEMENS
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Siemens IC 10 · 2017
Motor Starter Protectors/Circuit Breakers
SIRIUS 3RV2 Motor Starter Protectors/Circuit Breakers
3RV29 infeed system
7
$
Three-phase busbars with infeed
A three-phase busbar with infeed unit is required for connecting
the incoming supply. These modules comprise one infeed
module and two sockets which each accept one motor starter
protector. A choice of two versions with infeed on the left or right
is available. The infeed is connected to spring-type terminals.
They permit an infeed with conductor cross-sections of up to
25 mm
2
with end sleeve. An end cover is supplied with each
module.
%
Three-phase busbars for system expansion
The three-phase busbars for system expansion support expan-
sion of the system. There is a choice of modules with two or three
sockets. The system can be expanded as required up to a
maximum current carrying capacity of 63 A. An expansion plug
is supplied with each module.
&
a
Expansion plug
The expansion plug is used for electrical connection of adjacent
three-phase busbars. The current carrying capacity of this plug
equals 63 A. One expansion plug is supplied with each three-
phase busbar for system expansion. Additional expansion plugs
are therefore only required as spare parts.
&
b
Extra-wide expansion plug
The wide expansion plug makes the electrical connection
between two three-phase busbars, thus performing the same
function as the 3RV2917-5BA00 expansion plug; the electrical
characteristics (e.g. a current carrying capacity of 63 A) are
identical.
The 3RV2917-5E expansion plug is 10 mm wider than the
3RV2917-5BA00 expansion plug, hence in the plugged state
there is a distance of 10 mm between the connected three-
phase busbars. This distance can be used to lay the auxiliary
current and control current wiring ("wiring duct"). The motor
starter protector and contactor can be wired from underneath,
which means that the complete cable duct above the system
can be omitted.
(
End cover
The end cover is used to cover the three-phase busbar at the
open end of the system. This cover is therefore only required
once for each system. An end cover is supplied with each
three-phase busbar system with infeed. Further end covers are
therefore only required as spare parts.
)
Terminal block for device infeed
A new addition to the system is a connector for outfeeding to a
device slot within a module. This offers the option not only of
connecting three-phase loads to the system, but also of integrat-
ing single-phase loads into the infeed system.
*
Plug-in connector
The plug-in connector is used for the electrical connection
between the three-phase busbar and the 3RV2 motor starter
protector. These plug-in connectors are available for screw or
spring-type terminals.
+
Contactor base
Load feeders can be assembled in the system using the S00
and S0 contactor base. The contactor bases are suitable for
contactors sizes S00 and S0 with spring-type and screw termi-
nals and are simply snapped onto the three-phase busbars.
Direct-on-line starters and reversing starters are possible. One
contactor base is required for direct-on-line starters and two are
required for reversing starters.
To assemble load feeders for reversing starters, the contactor
bases can be arranged alongside each other (90 mm overall
width). In this case the mechanical interlocking of the contactors
is possible. The S0 contactor bases are also suitable for soft
starters size S00 and S0 with screw terminal.
The infeed system is designed for mounting onto a TH 35 stan-
dard mounting rail with 7.5 mm overall depth. This standard
mounting rail gives the contactor base a stable mounting sur-
face to sit on. If standard mounting rails with a depth of 15 mm
are used, the spacer connected to the bottom of the contactor
base must be knocked out and plugged into the standard
mounting rail mating piece, which is also located on the under-
side. Then the contactor base also has a stable mounting
surface. When standard mounting rails with a depth of 7.5 mm
are used, the spacer has no function and can be removed.
The link modules are used for direct start load feeders, in which
case the use of a contactor base is not absolutely necessary.
Motor starter protector and contactor assemblies can then be
directly snapped onto the sockets of the three-phase busbars.
For feeders of sizes S00 and S0, the corresponding
3RA1921-1
....
, 3RA2911-2
....
, 3RA2921-1
....
or 3RA2921-2
....
link modules should generally be used.
,
Terminal block
The 3RV2917-5D terminal block enables the integration of not
only SIRIUS motor starter protectors but also single-phase,
2-phase and 3-phase components. The three phases can be fed
out of the system using the terminal block; which means that
single-phase loads can also be integrated in the system. The
terminal block is plugged into the slot of the expansion plug and
thus enables outfeeding from the middle or end of the infeed
system. The terminal block can be rotated through 180° and be
locked to the support modules of the infeed system. In addition,
the 45 mm wide TH 35 3RV1917-7B standard mounting rail
option for screwing onto the support plate facilitates plugging
the single-phase, two-phase and three-phase components onto
the infeed system.
© Siemens AG 2016