User Guide

3RT1 contactors/3RH1 control relays
SIRIUS System Manual
GWA 4NEB 430 0999-02 DS 01
3-67
Components of the
wye-delta-combina-
tions
The following table shows you the features of the fully assembled wye-delta
combinations with time-delay auxiliary switch blocks with the wye-delta
function (3RT19.6-2B...) and solid-state time relays with semiconductor out-
put and the possible configuration, if you use the self-assembly kit:
Important
If a time-delay auxiliary switch block is mounted on the front of K3, an auxil-
iary switch block can only be mounted on the side of K3.
Accessories The following basic unit accessories can also be used for wye-delta combi-
nations:
• Auxiliary switch blocks (front, side)
• Surge suppressors
• Time-delay auxiliary switch blocks with wye-delta function
In addition, there are special accessories available for the wye-delta combi-
nations:
• 3-phase feed-in terminals
• Wye-point links (parallel links)
• Terminals for contactor coils (S2/S3)
• Mechanical connectors
• Wiring modules
Terminal for
contactor coils
In order to more easily reach coil terminals A1 and A2 in the wye-delta com-
bination from contactors in frame sizes S2 and S3, extension terminals for
contactor coils can be used.
For each combination, 2 x A1 and 1 x A2 are required.
Infeed With conductor cross-sections > 2 x 2.5 mm
2
and 1x>4 mm
2
, a feed-in
terminal block must be used for the wye-delta combination in frame size
S00. This makes the following conductor cross-sections possible:
• Frame size S00: up to 6 mm
2
• Frame size S0: up to 25 mm
2
• Frame size S2: up to 50 mm
2
Frame size S00 Frame sizes S0 to S3 Frame sizes S6 to S12
Fully assembled At front
(time-delay auxiliary
switch block)
at the side (timing relay)
—
Kit At front • at the side (timing relay)
• At front
(time-delay auxiliary contact
block)
• at the side (timing relay)
• At front
(time-delay auxiliary contact
block)
Table 3-28: Configuration of the wye-delta combinations