Why Choose the ABB 1SVR508211R0100 CT-SDC.22 Star-Delta Timer Relay?
The ABB 1SVR508211R0100, also known as the CT-SDC.22 star-delta timer relay, is a compact and reliable electronic time relay designed for automatic control of star-delta motor starting sequences in industrial applications. As part of the ABB CT-C timer relay range, it provides precise timing control, dependable switching and easy integration into motor control systems.
The CT-SDC.22 provides a dedicated star-delta timing function with seven adjustable time ranges from 0.05 seconds to 10 minutes and a fixed transition time of 50 ms. This allows controlled switching between star and delta motor configurations, helping reduce motor starting current and mechanical stress.
With a wide control supply range of 24–240 V AC and 24–48 V DC, two normally open output contacts and compact DIN rail mounting, the ABB CT-SDC.22 is ideal for industrial motor starters, automation panels and electrical control systems requiring reliable time-based switching.
Key Advantages
- Dedicated star-delta timer relay for motor starting applications.
- Seven selectable time ranges from 0.05 s to 10 min.
- Fixed 50 ms transition time between star and delta operation.
- Wide 24–240 V AC / 24–48 V DC supply range.
- Compact 17.5 mm DIN rail mounting design.
- Reliable ABB solution for industrial motor control systems.
Key Features
- ABB CT-C electronic timer relay series.
- Model: CT-SDC.22.
- Product ID: 1SVR508211R0100.
- Function: Star-delta timing control.
- Output: 2 normally open contacts.
- Time range: 0.05 s to 10 min.
- Transition time: Fixed 50 ms.
- DIN rail mounting design.
- Screw terminal connections.
Reliable Timing Control for Motor Starters
Star-delta starters are commonly used in industrial motor applications to reduce inrush current during startup. The ABB CT-SDC.22 timer relay provides accurate switching control between star and delta contactors, improving motor starting performance and protecting mechanical and electrical components.
The compact CT-C series design allows easy installation inside electrical control panels while maintaining reliable operation. Its flexible voltage range and dedicated star-delta function make it suitable for a wide variety of industrial automation and motor control applications.
Typical Applications
- Star-delta motor starter panels.
- Industrial motor control systems.
- Pumps and compressors.
- Manufacturing machinery.
- Automation control cabinets.
- OEM electrical equipment.
