3RT1/3RH1 contactors
SIRIUS System Manual
3-56
GWA 4NEB 430 0999-02b
Contactors with 4 main contacts and capacitor-switching contactors
Table 3-26: Possible auxiliary switch combinations with 4-pole/capacitor-switching contactors
Switching of the auxil-
iary contact elements
With the standard type of auxiliary switch, when the contactors are
switched on, first the NC contacts are opened and then the NO contacts are
closed.
Figure 3-33: Switching of the auxiliary contact elements
Auxiliary contact ele-
ments with make-
before-break contact-
ing
Table 3-27: Auxiliary switches with make-before-break contacting
1) Leading NO contact
S00 S0 S2/S3
Contactors with
4 main contacts
4 auxiliary con-
tacts
Maximum of 2 auxiliary
contacts
(attached at the side or
snapped on at the top)
Maximum 4 auxiliary
contacts (attached at the
side or snapped on at the
top)
Capacitor-swit-
ching contactors
An additional 2-pole auxiliary switch block on each side
(3RH1921-1EA..: 2 NO, 2 NC or 1 NO + 1 NC contact)
N
S
On
Off
Off
On
Off
On
Contactor
Standard
auxiliary
switch
S00
Auxiliary switch
type
S0 - S3
Auxiliary switch type
3RH1911-1FC22 22U, 2 NO + 2 NC
contacts
Screw-type terminal
3RH1921-1FC22 22U, 2 NO + 2 NC
contacts
Screw-type terminal
3RH1911-1FB11 11U, 1 NO + 1 NC
contact
Screw-type terminal
3RH1911-1FB22 11/11U.
1NO+1NC+1PS
1
)
+1lagging NC
contact
Screw-type terminal
3RH1911-2FC22 22U, 2 NO + NC
contact
Cage Clamp
3RH1911-2FB11 11U, 1 NO + 1 NC
contact
Cage Clamp
3RH1921-1CD10 1 NO contact, lead-
ing
Screw-type terminal
3RH1921-1CD01 1 NC contact, lagging
Screw-type terminal
3RH1921-2FC22 22 U, 2 NO + 2 NC
Cage Clamp
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