For isolating systems with ungrounded or poorly grounded neutral conductors
For system transfers when alternative AC power supplies are used
Use as contactors which only carry current and do not have to switch in case of inductive loads – e.g. variable-speed operating mechanisms
For switching mixed loads in distribution systems (e.g. for supplying heaters, lamps, motors, PC power supply units) with p.f. > 0.8 according to IEC 60947-4-1, test conditions for utilization category AC-1.
For a general description of sizes S00 to S2 of 3RT contactors, see "Power contactors for switching motors" > "SIRIUS 3RT contactors, 3-pole up to 250 kW".
