3RT1/3RH1 contactors
SIRIUS System Manual
3-30
GWA 4NEB 430 0999-02b
Cage Clamp terminals
The 3RH11 auxiliary contactors are also available with Cage Clamp terminals
- a screwless terminal system. This type of terminal is particularly suitable if
strong shaking or vibrations can be expected at the installation location.
These terminals are also suitable for two-conductor connections. All the ter-
minals are accessible from the front and are easily visible.
Soldering pin
connections
Both the 4-pole basic version as well as the auxiliary contactors that have an
auxiliary switch block attached at the front (see Section 3.4, Accessories)
can be soldered onto printed circuit boards using a soldering pin adapter.
Contact reliability
All the switching elements of the 3RH1 auxiliary contactors are equipped
with contact pieces that have particularly high contact stability, ensuring
high contact reliability even at low voltages and currents. This subject is dis-
cussed in detail in Section 3.2.3.2, "Contact reliability".
3RH14 latched
auxiliary contactors
If there is a short circuit in the low-voltage network, or when large drive
motors are switched on directly, the control supply voltage for the auxiliary
contactors may fail briefly or fall under the permissible tolerance level. To
ensure continuous operation, the variant with mechanical latching (3RH14)
can be used with the auxiliary contactors.
These auxiliary contactors latch mechanically after power-up and remain in
an energized state even in the event of a power failure. The auxiliary contac-
tor can be unlocked electrically using an interlock release magnet or manu-
ally using a button on the front of the attached latched block. When the volt-
age returns, the production program can be resumed immediately without
resetting times due to the storage feature of the auxiliary contactors. The
contactor coil and the coil of the release magnet are both designed for con-
tinuous operation.
The power input is the same for the contactor coil and the release coil. The
mechanical service life is 1 million operating cycles.
3.3.7 3RT10 contactor relays for switching motors (interface) and 3RH11 contactor relays for
switching auxiliary circuits
Contactor relays are available in the SIRIUS modular system for switching
motors and auxiliary circuits for the purpose of smooth interaction with elec-
tronic controllers. These are variants of the 3RT10/3RH11 contactor series
with the following features:
• Low power input
• Wide operating range of the magnet coil 0.7 to 1.25 x U
s
• High contact reliability of the auxiliary contacts
• Integrated or attachable overvoltage damping
To Next Page
Loading...
Need help?
General
