3RT1/3RH1 contactors
SIRIUS System Manual
3-22
GWA 4NEB 430 0999-02b
3.3.3 3RT13 and 3RT15 contactors with 4 main contacts
Model
There are two variants of the contactors with 4 main contacts :
• 3RT13 with 4 NO contacts
• 3RT15 with 2 NO and 2 NC contacts
You can use the accessories for both the 3-pole SIRIUS contactors and the
4-pole variants.
Field of application
The following table gives the fields of application for the 3RT13 and 3RT15
contactors:
Table 3-11: Applications of 4-pole contactors
Auxiliary contacts
The following table specifies the maximum number of auxiliary contacts
that can be attached:
Table 3-12: 4-pole contactors and auxiliary contacts
Contactor combination
with mechanical inter-
locking
The 4-pole 3RT13 contactors with 4 NO contacts as main contacts in frame
sizes S0 to S3 are suitable for putting together contactor combinations with
mechanical locking for use, for example, in supply switchovers.
The following tables show how the contactor combinations are put together
in different frame sizes:
3RT13 contactors with 4 NO
contacts
3RT15 contactors with 2 NO + 2 NC
contacts
• Switching of resistive loads
• Isolation of networks with
ungrounded or badly
grounded neutral conductors
• Supply switchovers in the
case of alternative AC power
supplies
• As a contactor - for example,
in variable-speed drives that
only have to carry the current,
not switch it
• Pole switchover in the case of
crane-type motors
• Switching of 2 separate loads
Frame size S00 Frame size S0 Frame sizes S2 and S3
4 auxiliary contacts Maximum 2 auxiliary con-
tacts (built on at the side or
snapped on at the top)
Maximum of 4 auxiliary
contacts
(built on at the side or
snapped on at the top)
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