Contactor assemblies for star-delta (wye-delta) starting consisting of SIRIUS 3RT and 3TF6 contactors, up to 710 kW

G_IC01_XX_00896 G_IC01_XX_00896 G_IC01_XX_00896 G_IC01_XX_00896 G_IC01_XX_00896 G_IC01_XX_00896

Video: Mounting a SIRIUS star-delta (wye-delta) combination – configuration example with 75 kW contactors

The individual parts for the contactor assemblies for star-delta (wye-delta) starting for customer assembly must be ordered separately.

• 3RT contactors and 3RT12 and 3TF6 vacuum contactors:
  The operating times of the individual contactors are rated in such a way that no overlapping of the contact making and the arcing time between two contactors can occur on reversing, providing they are interlocked by way of their auxiliary switches (NC contact interlock) and the mechanical interlock.
  For assemblies with AC operation and 50/60 Hz, a dead interval of 50 ms must be provided when used with voltages over 500 V; a dead interval of 30 ms is recommended for use with voltages up to and including 400 V. These dead times do not apply to assemblies with DC operation. The operating times of the individual contactors are not affected by the mechanical interlock.
• Mechanical interlocks
  • 3RT contactors and 3RT12 vacuum contactors: Adapter and mechanical interlock to interlock S6 and S3
  • 3TF68 vacuum contactors: Locking device for mechanical interlock
• Wiring kits consisting of link rails and neutral bridges
  • 3RT contactors and 3RT12 vacuum contactors
  • 3TF68 vacuum contactors
• Base plates
  • 3RT contactors and 3RT12 vacuum contactors
  • 3TF68 vacuum contactors

Additional components

• For momentary-contact operation: auxiliary switch (NO contact) for self-locking
• 3RB2 overload relays, SIMOCODE pro 3UF7 motor management and control devices or 3RN2 thermistor motor protection relays can be used for overload protection. The overload relay can either be mounted on the line contactor or fitted separately. It must be set to 0.58 times the rated motor current.
• Optional surge suppression for the S3 contactors; the contactors in sizes S6 to S12 are wired as standard with varistors.

The contactor assemblies for star-delta (wye-delta) starting for customer assembly are designed for standard applications.

Note:

Contactor assemblies for star-delta (wye-delta) starting in special applications such as very heavy starting¹⁾ or star-delta (wye-delta) starting of special motors must be customized. Help with designing such special applications is available from our Technical Support,
www.siemens.com/support-request.

¹⁾ For effective assistance from Technical Support, you must provide the following details:
- Rated motor voltage
- Rated motor current
- Service factor, operating values
- Motor starting current factor
- Startup time
- Ambient temperature

Contactor assemblies for star-delta (wye-delta) starting for customer assembly · Sizes S6-S6-S3 · Up to 160 kW

Contactor assemblies for star-delta (wye-delta) starting for customer assembly · Sizes S6-S6-S6 · Up to 160 kW

Video: Mounting a SIRIUS star-delta (wye-delta) combination – configuration example with 75 kW contactors

Contactor assemblies for star-delta (wye-delta) starting for customer assembly · Sizes S10-S10-S6 · Up to 250 kW

Video: Mounting a SIRIUS star-delta (wye-delta) combination – configuration example with 75 kW contactors

Contactor assemblies for star-delta (wye-delta) starting for customer assembly · Sizes S10-S10-S10 · Up to 250 kW

Video: Mounting a SIRIUS star-delta (wye-delta) combination – configuration example with 75 kW contactors

Contactor assemblies for star-delta (wye-delta) starting for customer assembly · Sizes S12-S12-S10 · Up to 500 kW

Video: Mounting a SIRIUS star-delta (wye-delta) combination – configuration example with 75 kW contactors

Contactor assemblies for star-delta (wye-delta) starting for customer assembly · Sizes S12-S12-S12 · Up to 500 kW

Video: Mounting a SIRIUS star-delta (wye-delta) combination – configuration example with 75 kW contactors

Contactor assemblies for star-delta (wye-delta) starting for customer assembly · Sizes 14-14-S12 · Up to 710 kW