Why Choose the ABB CT-SAC.22 Star-Delta Timer?
The ABB CT-SAC.22 is a compact single-function electronic star-delta timer relay designed to provide controlled transition from star to delta operation in motor starting applications. As part of the established ABB CT-C timer range, it provides adjustable timing and a defined transition period for reliable motor control.
The CT-SAC.22 provides four selectable time ranges from 0.05 s to 10 min, with the transition time between star and delta adjustable from 20 ms to 100 ms. This allows the timing sequence to be configured to suit different motor starting requirements.
With a rated control supply of 24–48 V DC or 24–240 V AC and two normally open output contacts, the CT-SAC.22 provides dedicated switching for star and delta contactors. Its compact 17.5 mm wide DIN rail housing is suitable for space-efficient motor control panels.
Key Advantages
- Compact electronic star-delta timer relay for motor starting applications.
- Four selectable time ranges from 0.05 s to 10 min.
- Adjustable transition time from 20 ms to 100 ms.
- 24–48 V DC or 24–240 V AC control supply.
- 2 n/o output contacts for star and delta contactor control.
- Output contacts rated at 250 V / 4 A.
- Compact 17.5 mm wide housing for efficient control panel installation.
- DIN rail mounting and screw terminals simplify installation and wiring.
Key Features
- ABB CT-C timer relay range.
- Star-delta motor starting function.
- Four selectable timing ranges.
- 0.05 s to 10 min adjustable time range.
- 20 ms to 100 ms adjustable star-delta transition time.
- 2 n/o contacts for star and delta switching.
- 250 V / 4 A rated output contacts.
- 24–48 V DC / 24–240 V AC rated control supply.
- DIN rail mounting for straightforward control cabinet installation.
- Screw terminals for secure industrial wiring.
Reliable Star-Delta Motor Starting Control
The ABB CT-SAC.22 provides the timed switching sequence required for star-delta motor starting. During the starting phase, the motor can be connected in star to reduce starting conditions before the timer initiates the transition to delta operation for normal running.
The adjustable transition period helps provide a controlled changeover between the star and delta contactors. Combined with selectable timing ranges and flexible AC/DC control supply compatibility, the CT-SAC.22 offers a practical solution for integrating star-delta starting sequences into industrial motor control panels.
Typical Applications
- Star-delta motor starter circuits.
- Industrial motor control panels.
- Three-phase induction motor starting systems.
- Industrial automation and control equipment.
- Motor control applications requiring reduced starting conditions.
- Machinery and plant electrical control systems.
