Siemens SIRIUS 3RH Series - Configuration; Overview of Applications for Contactors and Contactor Assemblies

SIRIUS 3RT2 contactors/contactor assemblies
2.4 Configuration
SIRIUS Innovations
116 System Manual, 01/2011, A8E56203870002-03
2.4 Configuration
2.4.1 Overview of applications for contactors and contactor assemblies
The table below provides an overview of the most important applications for contactors and
contactor assemblies.
Application area Description and suitable contactor versions
Switching motorized
loads
Contactors for switching three-phase motors (utilization category AC-3)
 3RT20 3-pole motor contactors
Switching resistive
loads
Contactors for switching resistive loads (utilization category AC-1)
 3RT20 3-pole power contactors
 3RT23 4-pole power contactors (4 NO contacts)
 3RT25 4-pole power contactors (2 NO contacts + 2 NC contacts)
Changing the polarity
of hoisting gear motors
Changing the polarity of hoisting gear motors or switching two separate loads.
 3RT25 4-pole contactors (2 NO contacts + 2 NC contacts)
Switching in the
auxiliary circuit
Switching devices for control and auxiliary circuits (utilization
categories AC-12/AC-15/AC-14/DC-12/DC-13).
 3RH21 4-pole contactor relays
 3RH22 8-pole contactor relays
Contactors with UC
drive
Contactors of size S0 for switching electrical loads in the main circuit with
a wide voltage range and extended operating range.
 3RT202: 3-pole motor contactors (3RT202.-.N…)
Contactors for
railway applications
Contactors for switching electrical loads in the main and control circuits
with extended operating and temperature ranges, e.g. for railway
applications or for use in rolling mills (special versions of contactor range
3RT20/3RH21).
 3RT2 3-pole power contactors
 3RH2 4-pole contactor relays
 3RT2 3-pole coupling relays
 3RH2 4-pole auxiliary coupling relays
Contactors with
extended operating
range
Coupling relays The coupling relays are tailored to the special requirements of working
with electronic controls (extended operating range and reduced coil
power). Different versions are available for main and control circuits
(special versions of contactor range 3RT20/3RH21).
 3RT20 3-pole coupling relays
 3RH21 4-pole auxiliary coupling relays