Contactors With An Extended Operating Range (3Rh1122-2K.40, 3Rt1017-2K.4., 3Rt102.-3K.40); 3Rh1 Auxiliary Contactors - Siemens sirius System Manual

3.3.5.2 Contactors with an extended operating range
(3RH1122-2K.40, 3RT1017-2K.4., 3RT102.-3K.40)
Installation
Ambient temperature

3.3.6 3RH1 auxiliary contactors

Terminal markings
Frame size and features
Screw-type terminals
SIRIUS System Manual
GWA 4NEB 430 0999-02b
Contactors of frame size S00: 3RH11 22-2K.40, 3RT1017-2K.4. and frame
size S0: 3RT102.-3K.40 have the following features:
• Extended operating range of 0.7 to 1.25 x U
• The magnet coils are wired with a varistor; an additional series resistor is
not required
• Permissible ambient temperature 60 °C
Note the following:
• Frame size S00: an auxiliary switch block cannot be attached
• Frame size S0: a maximum of two 1-pole auxiliary switch blocks can be
attached
At an ambient temperature > 60 °C < 70 °C, there must be spacing of
10 mm when installing in series.
The permissible ambient temperature for operating the contactors at the full
operating range of the magnet coils is -35 °C to +70 °C. During continuous
operation with temperatures > +55 °C, the mechanical service life, the cur-
rent-carrying capacity of the conducting paths, and the switching frequency
are reduced.
Auxiliary contactors are switching devices for auxiliary circuits for control-
ling, reporting, and interlocking. Auxiliary contactors have to meet specific
requirements in terms of clear terminal markings and a time- and cost-sav-
ing terminal system.
The SIRIUS 3RH1 auxiliary contactors (frame size S00) meet these require-
ments
The terminal markings comply with EN 50 011 and EN 50 005 (for a more
detailed explanation, see Section 3.4.1, Auxiliary switches).
3RH1 auxiliary contactors are available with the following:
• Frame size S00
• With AC and DC operation
• Format as for motor contactor of frame size S00
• 4-pole basic version
• Can be extended to 8 poles with snap-on auxiliary switch blocks
• Screw-type or Cage Clamp terminals
The 3RH1 auxiliary contactors have captive screws (cross-tip Pozidriv,
size 2), with all the terminal points open on delivery. The screwdriver guides
allow screwdriving machines to be used.
3RT1/3RH1 contactors
s
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