Standards

IEC 60947-1, DIN EN 60947-1,

IEC 60947-4-1, DIN EN 60947-4-1,

IEC 60947-5-1, EN 60947-5-1 (auxiliary switches)

The contactors are suitable for use in any climate. They are finger-safe according to IEC 60529.

3RT contactors: 4 contactors are used for switching resistive loads (AC-1) or as contactors, for example for variable-speed operating mechanisms that normally only have to carry the current.

The accessories and spare parts for the 3RT contactors can also be used here; see "Accessories and spare parts" > "for SIRIUS 3RT2 Contactors and SIRIUS 3RH2 Auxiliary Switches".

For a general description of sizes S3 to S12 of 3RT contactors, see "Power contactors for switching motors" > "SIRIUS 3RT contactors, 3-pole up to 250 kW".

Size S3: AC or AC/DC operation

• Coil circuits (varistors, diodes, etc.) retrofittable
• Auxiliary switches can be retrofitted
• Main and control conductors: Screw terminals

Sizes S6 to S12: AC/DC operating mechanism (50/60 Hz AC and DC)

• withdrawable coils with integrated coil switch (varistor)
• Auxiliary and control conductors: Screw terminals
• Main conductors: busbar connections

Operating mechanism types

Two types of solenoid operation are available:

• Conventional operating mechanisms
• Solid-state operating mechanism
  • The operating mechanism for the contactors features solid-state control of the contactor coil. Overvoltage damping of the operating mechanism coil is already integrated in the electronics. The operating mechanisms are powered via a supply voltage with an operating range of 0.7 to 1.25 x U_s, optionally also controlled depending on the chosen mode of operation. Alternatively, control is via the separate 24 V DC control signal input. Various rated voltage ranges for AC/DC control are available.
  • This version is additionally available with a 24 V DC PLC relay output and a remaining lifetime indicator (RLT).