SIRIUS 3RT2 contactors/contactor assemblies
2.2 Product description
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
113
2.2.3 Applications
Utilization categories
According to DIN EN 60947-4-1, the application area of and the load applied to power
contactors can be identified by looking at the specified utilization category in conjunction with
the specified rated operational current or the motor power and the rated voltage. The table
below lists the most important utilization categories for contactors.
Utilization categories
AC Main circuit contacts: Utilization category for AC voltages
AC-1 Non-inductive or slightly inductive loads, resistance furnaces
AC-2 Slip-ring motors: starting, switching off
AC-3 Squirrel-cage motors: starting, switching-off motors during running
AC-4 Squirrel-cage motors: starting, plugging, inching
AC-5a Switching of discharge lamp controls
AC-5b Switching of incandescent lamps
AC-6a Switching of transformers
AC-6b Switching of capacitor banks
DC Main circuit contacts: Utilization category for DC voltages
DC-1 Non-inductive or slightly inductive loads, resistance furnaces
DC-3 Slip-ring motors: starting, switching off
DC-5 Squirrel-cage motors: starting, switching-off motors during running
AC Auxiliary circuit contacts: Utilization category for AC voltages
AC-12 Control of resistive loads and solid-state loads with isolation by opto couplers
AC-14 Control of small electromagnetic loads (max. 72 VA)
AC-15 Control of electromagnetic loads (over 72 VA)
DC Auxiliary circuit contacts: Utilization category for DC voltages
DC-12 Control of resistive loads and solid-state loads with isolation by opto couplers
DC-13 Control of electromagnets
Reference
More information ... Can be found in the chapter titled ...
About contactor relay and power contactor
applications
Configuration (Page 116)
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